The M30 is the 'Big Six', the straight-six that powered BMW's large cars for more than a quarter of a century. It went into the E3, E9, E12, E23, E24, E28, E32 and E34, and its 3.5 litre version drove the M535i and 635CSi.
Collectors and drivers buy M30 units for E28 and E24 restorations, for E30 and E36 swaps, and because the block is famously tough. This guide also covers the M90, the 3.5 litre sister engine from 1979 that sits between the early M30 and the later Motronic units.
- Production: 1968–1994
- Versions covered: M30B25, M30B28, M30B30, M30B32, M90, M30B34 and M30B35
- Output range: 150–218 hp
- Fuel and layout: petrol inline-6
- Fitted to: 18 BMW models across 6 chassis generations
- In our stock now: ask the desk for the next arrival — browse all M30 engines
The M30 at a glance
The table lists every M30 version we supply with its capacity, layout, output and production years. Use it with your car's engine code to find the right unit.
| Engine code | Capacity | Layout | Power | Torque | Years |
|---|---|---|---|---|---|
| M30B25 | 2.5 L | Inline-6, naturally aspirated | 150 hp | 215 Nm | 1968–1994 |
| M30B28 | 2.8 L | Inline-6, naturally aspirated | 184 hp | 240 Nm | 1968–1994 |
| M30B30 | 3.0 L | Inline-6, naturally aspirated | 188 hp | 260 Nm | 1968–1994 |
| M30B32 | 3.2 L | Inline-6, naturally aspirated | 197 hp | 285 Nm | 1976–1984 |
| M90 | 3.5 L | Inline-6, naturally aspirated | 218 hp | 310 Nm | 1979–1986 |
| M30B34 | 3.4 L | Inline-6, naturally aspirated | 218 hp | 310 Nm | 1982–1994 |
| M30B35 | 3.5 L | Inline-6, naturally aspirated | 211 hp | 305 Nm | 1988–1994 |
Across 7 versions, output runs from 150 to 218 hp. The spread reflects different capacities, tuning for different markets and the technical updates BMW made over 27 years of production.
History of the M30
Introduced in 1968 at 2.5 and 2.8 litres, the M30 kept its iron block and single chain-driven camshaft throughout. Capacity grew to 3.0, 3.3, 3.4 and 3.5 litres. The M90 (3.5 litres, 218 hp) ran from 1979 in the E12 M535i, E23 735i and E24 635CSi, before the Motronic M30B34 and M30B35 replaced it.
1968: the M30B25 arrived with 2.5 L and 150 hp in the BMW E12 525, BMW E28 525i and BMW E24 525i.
1968: the M30B28 arrived with 2.8 L and 184 hp in the BMW E28 528i, BMW E24 628CSi and BMW E23 728i. Compared with the M30B25, it added 34 hp.
1968: the M30B30 arrived with 3.0 L and 188 hp in the BMW E9 3.0 CS, BMW E24 630CS and BMW E3 3.0 Si. Compared with the M30B28, it added 4 hp.
1976: the M30B32 arrived with 3.2 L and 197 hp in the BMW E28 533i, BMW E24 633CSi and BMW E23 733i. Compared with the M30B30, it added 9 hp.
1979: the M90 arrived with 3.5 L and 218 hp in the BMW E12 M535i, BMW E24 635CSi and BMW E23 735i. Compared with the M30B32, it added 21 hp.
1982: the M30B34 arrived with 3.4 L and 218 hp in the BMW E28 535i, BMW E24 635CSi and BMW E23 735i. It matched the M90 for power.
1988: the M30B35 arrived with 3.5 L and 211 hp in the BMW E34 535i and BMW E32 735i. It was a lower-output version for smaller or more economical models.
Every M30 version explained
M30B25 (2.5 L, 150 hp)
The M30B25 is a 2.5 L inline-6 petrol engine, naturally aspirated, rated at 150 hp and 215 Nm. BMW built it from 1968 to 1994. That is about 60 hp and 86 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, the M30B28 (184 hp), M30B30 (188 hp) and M30B32 (197 hp) are more powerful. It was fitted to the BMW E12 525, BMW E28 525i and BMW E24 525i.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 25 is the capacity in decilitres, so 2.5 litres.
M30B28 (2.8 L, 184 hp)
M30B28: 2.8 L, inline-6, petrol, naturally aspirated. Output is 184 hp with 240 Nm of torque, and production ran from 1968 to 1994. That is about 66 hp and 86 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, the M30B30 (188 hp), M30B32 (197 hp) and M90 (218 hp) are more powerful, while the M30B25 (150 hp) is milder. It was fitted to the BMW E28 528i, BMW E24 628CSi and BMW E23 728i.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 28 is the capacity in decilitres, so 2.8 litres.
M30B30 (3.0 L, 188 hp)
M30B30: 3.0 L, inline-6, petrol, naturally aspirated. Output is 188 hp with 260 Nm of torque, and production ran from 1968 to 1994. That is about 63 hp and 87 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, the M30B32 (197 hp), M90 (218 hp) and M30B34 (218 hp) are more powerful, while the M30B25 (150 hp) and M30B28 (184 hp) are milder. It was fitted to the BMW E9 3.0 CS, BMW E24 630CS and BMW E3 3.0 Si.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 30 is the capacity in decilitres, so 3.0 litres.
M30B32 (3.2 L, 197 hp)
Built from 1976 to 1984, the M30B32 displaces 3.2 L in an inline-6 layout and is naturally aspirated. It produces 197 hp and 285 Nm on petrol. That is about 62 hp and 89 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, the M90 (218 hp), M30B34 (218 hp) and M30B35 (211 hp) are more powerful, while the M30B25 (150 hp), M30B28 (184 hp) and M30B30 (188 hp) are milder. It was fitted to the BMW E28 533i, BMW E24 633CSi and BMW E23 733i.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 32 is the capacity in decilitres, so 3.2 litres.
M90 (3.5 L, 218 hp)
M90: 3.5 L, inline-6, petrol, naturally aspirated. Output is 218 hp with 310 Nm of torque, and production ran from 1979 to 1986. That is about 62 hp and 89 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, it is the most powerful version, while the M30B25 (150 hp), M30B28 (184 hp) and M30B30 (188 hp) are milder. It was fitted to the BMW E12 M535i, BMW E24 635CSi and BMW E23 735i.
M30B34 (3.4 L, 218 hp)
Built from 1982 to 1994, the M30B34 displaces 3.4 L in an inline-6 layout and is naturally aspirated. It produces 218 hp and 310 Nm on petrol. That is about 64 hp and 91 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, it is the most powerful version, while the M30B25 (150 hp), M30B28 (184 hp) and M30B30 (188 hp) are milder. It was fitted to the BMW E28 535i, BMW E24 635CSi and BMW E23 735i.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 34 is the capacity in decilitres, so 3.4 litres.
M30B35 (3.5 L, 211 hp)
M30B35: 3.5 L, inline-6, petrol, naturally aspirated. Output is 211 hp with 305 Nm of torque, and production ran from 1988 to 1994. That is about 60 hp and 87 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M30 family, the M90 (218 hp) and M30B34 (218 hp) are more powerful, while the M30B25 (150 hp), M30B28 (184 hp) and M30B30 (188 hp) are milder. It was fitted to the BMW E34 535i and BMW E32 735i.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 30 is the family number; B stands for petrol (from the German Benzin); 35 is the capacity in decilitres, so 3.5 litres.
Which cars use the M30
The M30 was fitted to 18 models. The list below is grouped by chassis generation so you can find your car quickly. Always confirm the exact code with your VIN, because BMW often used more than one engine in the same model.
BMW E12 first 5 Series (1972–1981)
In the first 5 Series, built 1972–1981 as a saloon, the M30 powered the 525 (M30B25, 150 hp) and M535i (M90, 218 hp).
For an E12, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update.
BMW E28 second 5 Series (1981–1988)
In the second 5 Series, built 1981–1988 as a saloon, the M30 powered the 525i (M30B25, 150 hp), 528i (M30B28, 184 hp), 533i (M30B32, 197 hp) and 535i (M30B34, 218 hp).
When ordering for an E28, check whether the car is rear-drive or xDrive and whether it has a manual or automatic gearbox, because the sump and flywheel can differ. All E28 engines in stock.
The 525i uses the M30B25. BMW 525i engines for sale.
The 528i uses the M30B28. BMW 528i engines for sale.
The 535i uses the M30B34. BMW 535i engines for sale.
BMW E24 first 6 Series (1976–1989)
In the first 6 Series, built 1976–1989 as a coupé, the M30 powered the 525i (M30B25, 150 hp), 628CSi (M30B28, 184 hp), 630CS (M30B30, 188 hp), 633CSi (M30B32, 197 hp), 635CSi (M90, 218 hp) and 635CSi (M30B34, 218 hp).
The quickest way to confirm the right M30 for your E24 is to send us the VIN; we check the engine code, the gearbox and the drive type.
The 525i uses the M30B25. BMW 525i engines for sale.
BMW E23 first 7 Series (1977–1986)
In the first 7 Series, built 1977–1986 as a saloon, the M30 powered the 728i (M30B28, 184 hp), 733i (M30B32, 197 hp), 735i (M90, 218 hp) and 735i (M30B34, 218 hp).
For an E23, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update.
Other models with the M30
The M30 also powered the E9 3.0 CS (M30B30, 188 hp) and E3 3.0 Si (M30B30, 188 hp).
BMW E34 third 5 Series (1988–1996)
In the third 5 Series, built 1988–1996 as a saloon, Touring, the M30 powered the 535i (M30B35, 211 hp).
For an E34, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update. All E34 engines in stock.
The 535i uses the M30B35. BMW 535i engines for sale.
BMW E32 second 7 Series (1986–1994)
In the second 7 Series, built 1986–1994 as a saloon, the M30 powered the 735i (M30B35, 211 hp).
The quickest way to confirm the right M30 for your E32 is to send us the VIN; we check the engine code, the gearbox and the drive type.
Will an M30 fit my BMW? Model-by-model answers
Short answers for every model that left the factory with an M30, with prices from our current stock.
Will the M30B25 fit my BMW E12 525?
For the BMW E12 525, the M30B25 is the factory engine and the one to order. The first 5 Series was built 1972–1981, and the M30B25 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E12 525?
We do not have an M30B25 on the shelf for the E12 525 at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B25 fit my BMW E28 525i?
For the BMW E28 525i, the M30B25 is the factory engine and the one to order. The second 5 Series was built 1981–1988, and the M30B25 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E28 525i?
We do not have an M30B25 on the shelf for the E28 525i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B25 fit my BMW E24 525i?
For the BMW E24 525i, the M30B25 is the factory engine and the one to order. The first 6 Series was built 1976–1989, and the M30B25 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 525i?
We do not have an M30B25 on the shelf for the E24 525i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B28 fit my BMW E28 528i?
For the BMW E28 528i, the M30B28 is the factory engine and the one to order. The second 5 Series was built 1981–1988, and the M30B28 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E28 528i?
We do not have an M30B28 on the shelf for the E28 528i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B28 fit my BMW E24 628CSi?
Yes, the BMW E24 628CSi left the factory with the M30B28, so an M30B28 from another car is the direct replacement. The first 6 Series was built 1976–1989, and the M30B28 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 628CSi?
We do not have an M30B28 on the shelf for the E24 628CSi at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B28 fit my BMW E23 728i?
For the BMW E23 728i, the M30B28 is the factory engine and the one to order. The first 7 Series was built 1977–1986, and the M30B28 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E23 728i?
We do not have an M30B28 on the shelf for the E23 728i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B30 fit my BMW E9 3.0 CS?
For the BMW E9 3.0 CS, the M30B30 is the factory engine and the one to order. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E9 3.0 CS?
We do not have an M30B30 on the shelf for the E9 3.0 CS at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B30 fit my BMW E24 630CS?
Yes, the BMW E24 630CS left the factory with the M30B30, so an M30B30 from another car is the direct replacement. The first 6 Series was built 1976–1989, and the M30B30 was produced 1968–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 630CS?
We do not have an M30B30 on the shelf for the E24 630CS at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B30 fit my BMW E3 3.0 Si?
For the BMW E3 3.0 Si, the M30B30 is the factory engine and the one to order. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E3 3.0 Si?
We do not have an M30B30 on the shelf for the E3 3.0 Si at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B32 fit my BMW E28 533i?
For the BMW E28 533i, the M30B32 is the factory engine and the one to order. The second 5 Series was built 1981–1988, and the M30B32 was produced 1976–1984, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E28 533i?
We do not have an M30B32 on the shelf for the E28 533i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B32 fit my BMW E24 633CSi?
The M30B32 is the original engine for the BMW E24 633CSi, which makes it the straightforward choice. The first 6 Series was built 1976–1989, and the M30B32 was produced 1976–1984, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 633CSi?
We do not have an M30B32 on the shelf for the E24 633CSi at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B32 fit my BMW E23 733i?
The M30B32 is the original engine for the BMW E23 733i, which makes it the straightforward choice. The first 7 Series was built 1977–1986, and the M30B32 was produced 1976–1984, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E23 733i?
We do not have an M30B32 on the shelf for the E23 733i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M90 fit my BMW E12 M535i?
For the BMW E12 M535i, the M90 is the factory engine and the one to order. The first 5 Series was built 1972–1981, and the M90 was produced 1979–1986, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E12 M535i?
We do not have an M90 on the shelf for the E12 M535i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M90 fit my BMW E24 635CSi?
Yes, the BMW E24 635CSi left the factory with the M90, so an M90 from another car is the direct replacement. The first 6 Series was built 1976–1989, and the M90 was produced 1979–1986, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 635CSi?
We do not have an M90 on the shelf for the E24 635CSi at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M90 fit my BMW E23 735i?
The M90 is the original engine for the BMW E23 735i, which makes it the straightforward choice. The first 7 Series was built 1977–1986, and the M90 was produced 1979–1986, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E23 735i?
We do not have an M90 on the shelf for the E23 735i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B34 fit my BMW E28 535i?
The M30B34 is the original engine for the BMW E28 535i, which makes it the straightforward choice. The second 5 Series was built 1981–1988, and the M30B34 was produced 1982–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E28 535i?
We do not have an M30B34 on the shelf for the E28 535i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B34 fit my BMW E24 635CSi?
The M30B34 is the original engine for the BMW E24 635CSi, which makes it the straightforward choice. The first 6 Series was built 1976–1989, and the M30B34 was produced 1982–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E24 635CSi?
We do not have an M30B34 on the shelf for the E24 635CSi at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the M30B34 fit my BMW E23 735i?
For the BMW E23 735i, the M30B34 is the factory engine and the one to order. The first 7 Series was built 1977–1986, and the M30B34 was produced 1982–1994, so check that your car's build date falls inside that window. Confirm the drive type (rear-drive or xDrive), the gearbox (manual or automatic) and the emissions standard, because these can change the sump, the flywheel and the software. Send us the VIN and we check all of it for you.
How much is a replacement engine for a BMW E23 735i?
We do not have an M30B34 on the shelf for the E23 735i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
M30 model-year guide
Use this year-by-year guide to see which M30 versions were in production when your car was built.
1968 — M30B25, M30B28 and M30B30 were in production. New this year: M30B25, M30B28 and M30B30.
1969 — M30B25, M30B28 and M30B30 were in production.
1970 — M30B25, M30B28 and M30B30 were in production.
1971 — M30B25, M30B28 and M30B30 were in production.
1972 — M30B25, M30B28 and M30B30 were in production.
1973 — M30B25, M30B28 and M30B30 were in production.
1974 — M30B25, M30B28 and M30B30 were in production.
1975 — M30B25, M30B28 and M30B30 were in production.
1976 — M30B25, M30B28, M30B30 and M30B32 were in production. New this year: M30B32.
1977 — M30B25, M30B28, M30B30 and M30B32 were in production.
1978 — M30B25, M30B28, M30B30 and M30B32 were in production.
1979 — M30B25, M30B28, M30B30, M30B32 and M90 were in production. New this year: M90.
1980 — M30B25, M30B28, M30B30, M30B32 and M90 were in production.
1981 — M30B25, M30B28, M30B30, M30B32 and M90 were in production.
1982 — M30B25, M30B28, M30B30, M30B32, M90 and M30B34 were in production. New this year: M30B34.
1983 — M30B25, M30B28, M30B30, M30B32, M90 and M30B34 were in production.
1984 — M30B25, M30B28, M30B30, M30B32, M90 and M30B34 were in production. Last year for M30B32.
1985 — M30B25, M30B28, M30B30, M90 and M30B34 were in production.
1986 — M30B25, M30B28, M30B30, M90 and M30B34 were in production. Last year for M90.
1987 — M30B25, M30B28, M30B30 and M30B34 were in production.
1988 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production. New this year: M30B35.
1989 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production.
1990 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production.
1991 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production.
1992 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production.
1993 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production.
1994 — M30B25, M30B28, M30B30, M30B34 and M30B35 were in production. Last year for M30B25, M30B28, M30B30, M30B34 and M30B35.
Common M30 problems and what to check
No engine is perfect. These are the faults our workshop sees most often on the M30, what causes them and how to check a used unit before you buy.
Head gasket and cracked heads
The large aluminium head is sensitive to overheating. Cracks between combustion chambers and failed head gaskets are the most common major fault.
How to check: Do a compression test and look for bubbles in the expansion tank with the engine running.
Cooling system age
Radiators, viscous fan clutches and hoses age. Most M30 failures start with a cooling fault rather than inside the engine.
How to check: Check the fan clutch resistance hot and the radiator for blocked cores.
Rocker arm wear
Like other BMW SOHC engines, rocker pads and cam lobes wear when oil is old or the spray bar is loose.
How to check: Inspect the cam surface with the valve cover off.
Timing chain tensioner
The duplex chain lasts, but the tensioner piston and guide rails wear on high-mileage units.
How to check: Listen for a cold-start rattle at the front of the engine.
Oil pressure sender and leaks
Sender leaks, valve cover gaskets and rear main seals seep with age.
How to check: Check for oil around the filter housing and the bellhousing.
Diagnosing a failing M30: symptoms and causes
If your current engine is showing one of these symptoms, this table helps you judge whether it can be repaired or whether a replacement M30 is the better route.
| Symptom | Likely cause |
|---|---|
| Knocking from the bottom of the engine | A deep knock that rises with engine speed usually means worn rod or main bearings. |
| Overheating or losing coolant | Coolant loss without visible leaks points to a head gasket or a cracked head; visible leaks point to the water pump, hoses, thermostat housing or expansion tank. |
| White smoke that smells sweet | Coolant burning in the cylinders, from a head gasket, a cracked head or, on diesels, a leaking EGR cooler. |
| Blue smoke | Oil burning in the cylinders. |
| Rough idle or misfire | Ignition coils, spark plugs, injectors and vacuum leaks are the usual causes. |
| Loss of power | Start with the simple things: air filter, boost leaks on turbo engines, fuel pressure and fault codes. |
| Rattle for a few seconds after a cold start | The classic sign of a weak timing chain tensioner or stretched chain. |
Knocking from the bottom of the engine. A deep knock that rises with engine speed usually means worn rod or main bearings. Stop driving: bearing failure ends with a broken connecting rod. A used engine is normally the most economical fix once the bottom end is damaged.
Overheating or losing coolant. Coolant loss without visible leaks points to a head gasket or a cracked head; visible leaks point to the water pump, hoses, thermostat housing or expansion tank. Overheating should be fixed before it warps the head.
White smoke that smells sweet. Coolant burning in the cylinders, from a head gasket, a cracked head or, on diesels, a leaking EGR cooler. Check the coolant level and look for oil in the coolant.
Blue smoke. Oil burning in the cylinders. A puff on start-up points to valve stem seals; constant smoke under load points to piston rings or, on turbo engines, turbo seals.
Rough idle or misfire. Ignition coils, spark plugs, injectors and vacuum leaks are the usual causes. A misfire on one cylinder that moves when you swap coils is a coil; one that stays is a plug, injector or compression problem.
Loss of power. Start with the simple things: air filter, boost leaks on turbo engines, fuel pressure and fault codes. A gradual loss with poor compression on a test points to internal wear.
Rattle for a few seconds after a cold start. The classic sign of a weak timing chain tensioner or stretched chain. It must be checked quickly: a chain that jumps a tooth can bend valves.
Repair or replace your M30?
Repair makes sense when the fault is outside the engine or in a part that can be replaced without opening it: sensors, coils, injectors, gaskets, the water pump or a turbo. Replacement makes sense when the bottom end, the crankshaft, the bores or the head are damaged, because rebuilding an M30 properly costs more than a good used unit.
Ask your workshop for a written diagnosis before deciding. A compression test, an oil analysis and a borescope inspection take an hour or two and remove most of the guesswork.
M30 maintenance and running costs
| Item | Recommendation |
|---|---|
| Engine oil | 10W-40 or 15W-40, about 5.75 litres with filter on most versions. |
| Timing drive | Duplex timing chain at the front with a hydraulic tensioner; no service interval. |
| Service interval | Oil every 7,500 km; valve clearances every 15,000 to 20,000 km. |
Valve clearances are set with eccentric adjusters at about 0.30 mm cold. Keep the cooling system fresh and the fan clutch healthy.
The single best thing you can do for an M30 is to change the oil more often than the longest factory interval. Clean oil protects bearings, chains, VANOS units and turbochargers, and costs far less than any of them.
Buying a used M30: the full checklist
Work through these points before you order a used M30, whoever you buy from.
- Confirm the exact engine code. Read the code stamped on the block and compare it with the code for your car. Send us the last seven characters of the VIN and we confirm the match before anything is paid.
- Ask how the donor car was damaged. Most good used engines come from cars with body damage. A front-end impact can crack sensors, the timing cover or the sump; a rear or side impact usually leaves the engine untouched. The yard records the damage on each unit.
- Compression or leak-down figures. Even compression across all cylinders tells you more than mileage. Ask for the figures, not just a pass or fail, and compare the highest and lowest readings: a spread above 10 to 15 percent deserves a question.
- Look at the oil and coolant. Clean oil without metal particles and coolant without oil are good signs. Milky oil, oily coolant or a burnt smell mean the engine needs further checks before it is fitted.
- Photographs from every side. Good suppliers photograph the actual engine you will receive. Look for the block stamp, the sump, the timing cover and any broken brackets or connectors in the pictures.
- List of what is fitted. Engines are sold with different ancillaries: some have the turbo, injectors, manifolds, alternator and starter, others are long blocks. Agree the list in writing so you know which parts must come from your old engine.
- Sump, oil pickup and drive variants. Rear-drive, xDrive and front-drive cars can use different sumps, oil pickups and engine mounts even with the same engine code. Check that the sump matches your subframe and front axle.
- Gearbox and flywheel match. Manual and automatic engines differ at the flywheel or flexplate, and sometimes at the crankshaft spigot. Make sure the engine you buy matches your gearbox or that you transfer the right parts.
- Warranty terms in writing. Read what the warranty covers, how long it runs and what fitting conditions apply. Most warranties require a qualified workshop, new fluids and filters, and replacement of the cooling parts that caused the original failure.
- Why your old engine failed. Before fitting a replacement, find out why the original failed. An overheating radiator, a blocked intercooler or a failed turbo can destroy a second engine if they are not fixed.
- Timing chain noise. Listen for a rattle at the front of the engine for the first seconds after a cold start. On an engine that cannot be run, look at the chain guides through the oil filler or with the valve cover off.
- Originality and numbers. For collectible cars, the engine number and correct ancillaries add value. Photograph the stamp and keep it with the car's documents.
M30 prices: what you should pay
We do not have an M30 on the shelf at the moment. Send us your VIN or the code you need and the desk will tell you when the next unit arrives and what it will cost.
M30 engines in stock now
Fitting a replacement M30
These are the steps we recommend to every workshop fitting one of our M30 engines.
- Compare the engines side by side. Put the replacement next to the old engine and compare sensors, brackets, connectors, the sump, the starter and the flywheel or flexplate. Note anything that must be transferred.
- Transfer the parts that differ. Move the parts that are specific to your car, such as the engine harness on some models, the sump on xDrive cars or the air conditioning compressor bracket. Use new seals and gaskets for everything you move.
- Replace the rear main seal and drive parts. With the engine out, the rear crankshaft seal is easy to reach. Fit a new one, inspect the flywheel and clutch on manual cars or the converter seal on automatics.
- Renew the cooling system. Most engine failures start with cooling. Fit a new water pump, thermostat and hoses, check the radiator and fan, and use the correct coolant.
- Fit new engine mounts. Old mounts transfer vibration and can let the engine move enough to damage hoses. They are cheap and easy to replace with the engine out.
- Inspect or replace the timing chain parts. Look at the guides and tensioner. On high-mileage engines, replacing them now costs far less than doing it later.
- Clean the intake. If the old engine failed internally, debris can be in the intake or intercooler. Clean them so nothing reaches the new engine.
- Fill with the right oil and prime it. Fill with new oil of the correct specification and a new filter. Crank with the fuel and ignition disabled until oil pressure builds.
- Coding and adaptations. On modern BMWs, the engine ECU must be matched to the car's immobiliser (CAS, FEM or BDC). Reset adaptations, register the battery and clear faults with diagnostic software.
- First start and leak check. Start the engine, let it idle and watch oil pressure, temperature and fault codes. Check for leaks and bleed the cooling system.
- First 1,000 km. Drive gently for the first few hundred kilometres, vary the engine speed and avoid full load. Change the oil and filter after about 1,000 km to remove any assembly debris.
Tuning and upgrades
M30 owners often fit a 3.5 litre unit in place of a 2.8 or 3.0, or build a turbocharged M30 using the strong bottom end. Head work and cam upgrades suit naturally aspirated builds.
Whatever you plan, start with a healthy engine: a compression test, fresh fluids and the known weak parts replaced. Power upgrades amplify any existing problem.
M30 compared with similar BMW engines
Buyers often compare the M30 with these engines. Here is how they line up.
| Engine | Power | Years | Median price in stock |
|---|---|---|---|
| M30 | 150–218 hp | 1968–1994 | on request |
| N54 | 306–306 hp | 2006–2016 | 3.595,00 € |
| N55 | 306–326 hp | 2009–2017 | 4.025,00 € |
| B58 | 340–374 hp | 2015–2026 | 5.870,00 € |
The N54 reaches higher outputs (up to 306 hp against 218 hp) and uses timing chain at the front. Its best-known faults are high-pressure fuel pump and wastegate rattle. Read the N54 guide.
The N55 reaches higher outputs (up to 326 hp against 218 hp) and uses timing chain at the front. Its best-known faults are oil filter housing gasket and valve cover gasket. Read the N55 guide.
The B58 reaches higher outputs (up to 374 hp against 218 hp) and uses timing chain at the rear (gearbox end). Its best-known faults are coolant leaks and oil filter housing. Read the B58 guide.
Delivery, warranty and payment
Before an M30 engine leaves our Hamburg yard it is drained of oil and coolant, every opening is sealed, and it is strapped to a pallet and wrapped. We send photographs of the packed unit and the tracking details.
Door-to-door delivery is included to the address you give at checkout. Typical delivery takes three to five working days within Germany and neighbouring countries and five to ten working days to the rest of Europe and the UK.
A 12-month warranty covers eligible internal failure when the engine is fitted by a qualified workshop with new fluids and filters. You can pay by card, bank transfer or crypto and receive the invoice by email straight away.
We deliver M30 engines from Hamburg to customers across Europe and beyond. Typical door-to-door times and customs status:
| Country | Typical delivery | Customs and VAT |
|---|---|---|
| Germany | 2–4 working days | No customs; German VAT on the invoice |
| Netherlands | 3–5 working days | EU delivery, no customs |
| Belgium | 3–5 working days | EU delivery, no customs |
| Austria | 3–5 working days | EU delivery, no customs |
| Denmark | 3–5 working days | EU delivery, no customs |
| Poland | 3–6 working days | EU delivery, no customs |
| Czech Republic | 3–6 working days | EU delivery, no customs |
| France | 4–7 working days | EU delivery, no customs |
| Italy | 5–8 working days | EU delivery, no customs |
| Spain | 5–8 working days | EU delivery, no customs |
| Portugal | 6–9 working days | EU delivery, no customs |
| Sweden | 5–8 working days | EU delivery, no customs |
| Norway | 6–10 working days | Export; import VAT and duty in Norway |
| Switzerland | 5–8 working days | Export; import VAT and duty in Switzerland |
| United Kingdom | 5–10 working days | Export; UK import VAT and duty on arrival |
| Ireland | 6–10 working days | EU delivery, no customs |
| United States | Quoted per order | Export; US import duties apply |
| United Arab Emirates | Quoted per order | Export; UAE import duties apply |
Times are typical for pallet delivery after dispatch and can vary with holidays and remote addresses. Business buyers in the EU with a valid VAT number can order without German VAT.
Questions buyers ask about the M30
Will the M30B35 engine fit my BMW E28 535i?
Yes, if your BMW E28 535i was built with the M30B35. BMW used this 3.5 liter (3,430 cc) petrol engine with 155 kW (211 HP) in the E28 535i from about 1982 to 1993.
In our records the M30B35 is the engine for the E28 535i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E28 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much is a replacement M30B35 engine for a BMW E28 535i?
A used M30B35 for the BMW E28 535i costs from about 1.800 € to 2.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B35 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
Will the M30B35 engine fit my BMW E34 535i?
Yes, if your BMW E34 535i was built with the M30B35. BMW used this 3.5 liter (3,430 cc) petrol engine with 155 kW (211 HP) in the E34 535i from about 1982 to 1993.
In our records the M30B35 is the engine for the E34 535i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E34 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much is a replacement M30B35 engine for a BMW E34 535i?
A used M30B35 for the BMW E34 535i costs from about 1.800 € to 2.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B35 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
Will the M30B35 engine fit my BMW E24 635CSi?
Yes, if your BMW E24 635CSi was built with the M30B35. BMW used this 3.5 liter (3,430 cc) petrol engine with 155 kW (211 HP) in the E24 635CSi from about 1982 to 1993.
In our records the M30B35 is the engine for the E24 635CSi, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E24 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much is a replacement M30B35 engine for a BMW E24 635CSi?
A used M30B35 for the BMW E24 635CSi costs from about 1.800 € to 2.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B35 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
Will the M30B35 engine fit my BMW E23 735i?
Yes, if your BMW E23 735i was built with the M30B35. BMW used this 3.5 liter (3,430 cc) petrol engine with 155 kW (211 HP) in the E23 735i from about 1982 to 1993.
In our records the M30B35 is the engine for the E23 735i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E23 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much is a replacement M30B35 engine for a BMW E23 735i?
A used M30B35 for the BMW E23 735i costs from about 1.800 € to 2.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B35 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
Will the M30B35 engine fit my BMW E32 735i?
Yes, if your BMW E32 735i was built with the M30B35. BMW used this 3.5 liter (3,430 cc) petrol engine with 155 kW (211 HP) in the E32 735i from about 1982 to 1993.
In our records the M30B35 is the engine for the E32 735i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E32 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much is a replacement M30B35 engine for a BMW E32 735i?
A used M30B35 for the BMW E32 735i costs from about 1.800 € to 2.950 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B35 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
Will the M30B34 engine fit my BMW E28 M5?
Yes, if your BMW E28 M5 was built with the M30B34. BMW used this 3.4 liter (3,430 cc) petrol engine with 160 kW (218 HP) in the E28 M5 from about 1985 to 1988.
Some E28 M5 cars were built with a different engine: the S38B36. These look alike from the outside, so check the code on your engine or send us your VIN.
Also tell us if your E28 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
How much is a replacement M30B34 engine for a BMW E28 M5?
A used M30B34 for the BMW E28 M5 costs from about 2.150 € to 3.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B34 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
Will the M30B34 engine fit my BMW E24 M635CSi?
Yes, if your BMW E24 M635CSi was built with the M30B34. BMW used this 3.4 liter (3,430 cc) petrol engine with 160 kW (218 HP) in the E24 M635CSi from about 1985 to 1988.
In our records the M30B34 is the engine for the E24 M635CSi, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E24 has a manual or an automatic gearbox. The flywheel or the flex plate and some sensors depend on it.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
How much is a replacement M30B34 engine for a BMW E24 M635CSi?
A used M30B34 for the BMW E24 M635CSi costs from about 2.150 € to 3.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.
A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The M30B34 you buy is photographed and checked in Hamburg before it is listed.
Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop. Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
What is the BMW M30B35 engine?
The BMW M30B35 is a 3.5 liter (3,430 cc) petrol engine from the M30 family. It has an inline 6, SOHC, 12 valve layout with no turbo (naturally aspirated), and makes 155 kW (211 HP) with 305 Nm of torque. BMW built it from 1982 to 1993 and it meets the Euro 1 emission standard.
You find the M30B35 in the BMW E28 535i, BMW E34 535i, BMW E24 635CSi, BMW E23 735i and BMW E32 735i. What we list: BMW M30 big-six petrol engines for E28, E24, E23 and E34.
At Autowerke Engines every M30B35 is a real used engine from our yard in Hamburg. Each engine in the yard is inspected in Hamburg. The code is matched to the listing, the parts on the engine are recorded, the openings are sealed and the real unit is photographed. Each listing shows the year, the mileage and the price, so you can compare units side by side.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much does a used BMW M30B35 engine cost?
A used BMW M30B35 engine in our yard usually costs between 1.800 € and 2.950 €. The exact price depends on the year, the mileage and the parts that come with the engine.
Our units show recorded mileage from about 22,000 km up to around 200,000 km. Lower mileage and more ancillaries mean a higher price. Each listing shows its own price, and the price you see is the price you pay. Prices include VAT for private buyers.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you order a gearbox or a second engine on the same order, the fee is still charged once.
Inside the EU there is no import duty. For the UK and other non-EU countries, import duty and local VAT are paid by the receiver, and we supply a commercial invoice.
See all M30 Engines · Search M30B35 in the shop
Which cars use the BMW M30B35 engine?
BMW fitted the M30B35 to the BMW E28 535i, BMW E34 535i, BMW E24 635CSi, BMW E23 735i and BMW E32 735i. These cars were built with this engine from about 1982 to 1993.
The badge on the boot is not enough to be sure. The same model name can hide two different engines, for example after a facelift or a change in emission rules. Always read the engine code stamped on the block, or look it up with your VIN.
Other engines in the same M30 family are the M30B34 (218 HP). They look alike but differ in power, parts and electronics, so they are not always a direct swap.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How much power and torque does the BMW M30B35 have?
From the factory the BMW M30B35 makes 155 kW (211 HP) and 305 Nm of torque. It is a 3.5 liter (3,430 cc) inline 6, SOHC, 12 valve petrol engine with no turbo (naturally aspirated).
Without a turbo, the power builds smoothly with the revs. A clean air intake, healthy ignition and the correct fuel are key to getting the full figure.
A used engine reaches its factory numbers when it is fitted with the matching engine computer and software, and serviced with the right oil and filters. If the engine computer from your car is a different version, a specialist may need to code it.
Every M30B35 on our site lists its year and mileage. You can ask for extra photos, a close-up of the code stamp or a short video before you order.
See all M30 Engines · Search M30B35 in the shop
How do I know a used M30B35 engine is in good shape?
Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive. An inspection certificate for the unit can travel with the order when you ask for it.
When you look at a listing, check the recorded mileage, the year and the photos of the ports and the stamp. Ask for photos of anything you want to see closer. Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide.
On a petrol engine like the M30B35, a careful fitter will also look at the spark plugs, the coils and the timing side before the engine goes in.
If the engine fails inside under normal use, the warranty covers you. Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop.
See all M30 Engines · Search M30B35 in the shop
What comes with a used M30B35 engine?
Each M30B35 is sold as described on its own listing. The yard writes down the parts that are fitted to that unit, such as the turbo, the injectors, the manifolds or the alternator, so you know what arrives.
Some units are long engines with few ancillaries, others are more complete. If you need a part that is not listed, ask the desk. We often have the matching items in the yard.
Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.
On delivery, the carrier brings the pallet to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready.
See all M30 Engines · Search M30B35 in the shop
Is the BMW M30B35 a diesel or petrol engine?
The M30B35 is a petrol engine. It is a 3.5 liter (3,430 cc) inline 6, SOHC, 12 valve unit with no turbo (naturally aspirated), and it was built to the Euro 1 emission standard.
The emission standard matters for registration and for low-emission zones in many cities. When you replace an engine with the same code, the car keeps the same paperwork and the same emission class.
Petrol versions need the correct catalytic converters and oxygen sensors on the car to stay legal and to keep the engine computer happy. Reuse the parts from your car if they are in good condition.
If you are not sure which version you need, send us your VIN. We tell you the right code for free.
See all M30 Engines · Search M30B35 in the shop
What is the difference between the M30B35 and other M30 engines?
The M30B35 makes 155 kW (211 HP) and 305 Nm. The other M30 engines are: M30B34 with 160 kW (218 HP) and 310 Nm (1985 to 1988).
Engines in one family share a basic block, but the turbo, the injection, the sensors and the engine computer can differ. A higher power version often has different pistons, a bigger turbo or a different fuel system.
This is why we ask for the exact code. Fitting a different version can work, but the wiring, the software and sometimes the gearbox must be changed to match.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B35 in the shop
How long does delivery of an M30B35 engine take?
Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day. Delivery to the Netherlands, Belgium, Germany, France, Luxembourg and Denmark takes 1 to 3 working days.
Spain, Italy, Portugal, Poland, Czechia, Austria, Ireland, the Nordics and the Baltics take 2 to 5 working days. Greek and Spanish islands, Malta, Cyprus and remote areas take 4 to 8 working days. The UK and other countries outside the EU are quoted one by one.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.
You get a tracking number when the pallet is collected. Check the wrapping before you sign, and note any damage on the paperwork.
See all M30 Engines · Search M30B35 in the shop
What should I replace when I fit a used M30B35 engine?
A used engine lasts longest when it starts life in your car with fresh fluids and new seals. Fit a new oil filter and fresh oil of the grade BMW lists for this engine, and refill the coolant with the correct BMW antifreeze mix. Check the spark plugs and the ignition coils, and make sure the fuel lines are clean and tight before you crank the engine. Change the drive belt, the thermostat and the water pump seals if they look tired, because they are cheap while the engine is out.
Look at the engine mounts and the clutch or the torque converter while the engine is out. Old mounts can crack a new engine's brackets, and a worn clutch is much easier to change now.
Before the first start, turn the engine over without fuel until the oil pressure light goes out. Then let it idle, check for leaks, and drive gently for the first few hundred kilometres.
The warranty asks for fitting by a qualified mechanic and the correct oil, coolant and filters. Keep your receipts in case you ever need to make a claim.
See all M30 Engines · Search M30B35 in the shop
Does a used M30B35 engine come with a warranty?
Yes. Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop.
The warranty does not cover damage from wrong fitting, overheating, low oil, wrong fluids or fuel, engines that were opened or modified without our approval, or labour and towing costs.
To claim, send us your order number, a short description of the problem, photos or a video, and a mechanic's report if we ask for one. If the claim is approved, we repair, replace or refund the engine.
Keep the receipts for the fitting, the oil and the filters. They make any claim quick and simple.
See all M30 Engines · Search M30B35 in the shop
Can you check if an M30B35 fits my car with my VIN?
Yes, and it is free. Send the 17-character VIN of your car and, if you have it, the gearbox code. We check the engine family, the build year window and the parts your car needs.
For the M30B35, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E28 535i, BMW E34 535i, BMW E24 635CSi, BMW E23 735i and BMW E32 735i.
We only reserve an engine once the match is confirmed, so you never pay for the wrong unit. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
You can also use the VIN check on our site. It reads the year, the make, the model and the engine from the public vehicle register.
See all M30 Engines · Search M30B35 in the shop
What is the BMW M30B34 engine?
The BMW M30B34 is a 3.4 liter (3,430 cc) petrol engine from the M30 family. It has an inline 6, SOHC, 12 valve layout with no turbo (naturally aspirated), and makes 160 kW (218 HP) with 310 Nm of torque. BMW built it from 1985 to 1988 and it meets the Euro 1 emission standard.
You find the M30B34 in the BMW E28 M5 and BMW E24 M635CSi. What we list: BMW M30 big-six petrol engines for E28, E24, E23 and E34.
At Autowerke Engines every M30B34 is a real used engine from our yard in Hamburg. The photos on each listing show the actual engine, not a stock picture. The yard checks the code, records what is bolted on, and seals the openings before the engine is offered. Each listing shows the year, the mileage and the price, so you can compare units side by side.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
How much does a used BMW M30B34 engine cost?
A used BMW M30B34 engine in our yard usually costs between 2.150 € and 3.450 €. The exact price depends on the year, the mileage and the parts that come with the engine.
Our units show recorded mileage from about 22,000 km up to around 200,000 km. Lower mileage and more ancillaries mean a higher price. Each listing shows its own price, and the price you see is the price you pay. Prices include VAT for private buyers.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. If you order a gearbox or a second engine on the same order, the fee is still charged once.
Inside the EU there is no import duty. For the UK and other non-EU countries, import duty and local VAT are paid by the receiver, and we supply a commercial invoice.
See all M30 Engines · Search M30B34 in the shop
Which cars use the BMW M30B34 engine?
BMW fitted the M30B34 to the BMW E28 M5 and BMW E24 M635CSi. These cars were built with this engine from about 1985 to 1988.
The badge on the boot is not enough to be sure. The same model name can hide two different engines, for example after a facelift or a change in emission rules. Always read the engine code stamped on the block, or look it up with your VIN.
Other engines in the same M30 family are the M30B35 (211 HP). They look alike but differ in power, parts and electronics, so they are not always a direct swap.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
How much power and torque does the BMW M30B34 have?
From the factory the BMW M30B34 makes 160 kW (218 HP) and 310 Nm of torque. It is a 3.4 liter (3,430 cc) inline 6, SOHC, 12 valve petrol engine with no turbo (naturally aspirated).
Without a turbo, the power builds smoothly with the revs. A clean air intake, healthy ignition and the correct fuel are key to getting the full figure.
A used engine reaches its factory numbers when it is fitted with the matching engine computer and software, and serviced with the right oil and filters. If the engine computer from your car is a different version, a specialist may need to code it.
Every M30B34 on our site lists its year and mileage. Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide.
See all M30 Engines · Search M30B34 in the shop
How do I know a used M30B34 engine is in good shape?
Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive. An inspection certificate for the unit can travel with the order when you ask for it.
When you look at a listing, check the recorded mileage, the year and the photos of the ports and the stamp. Ask for photos of anything you want to see closer. You can ask for extra photos, a close-up of the code stamp or a short video before you order.
On a petrol engine like the M30B34, a careful fitter will also look at the spark plugs, the coils and the timing side before the engine goes in.
If the engine fails inside under normal use, the warranty covers you. Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop.
See all M30 Engines · Search M30B34 in the shop
What comes with a used M30B34 engine?
Each M30B34 is sold as described on its own listing. The yard writes down the parts that are fitted to that unit, such as the turbo, the injectors, the manifolds or the alternator, so you know what arrives.
Some units are long engines with few ancillaries, others are more complete. If you need a part that is not listed, ask the desk. We often have the matching items in the yard.
Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.
On delivery, the carrier brings the pallet to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready.
See all M30 Engines · Search M30B34 in the shop
Is the BMW M30B34 a diesel or petrol engine?
The M30B34 is a petrol engine. It is a 3.4 liter (3,430 cc) inline 6, SOHC, 12 valve unit with no turbo (naturally aspirated), and it was built to the Euro 1 emission standard.
The emission standard matters for registration and for low-emission zones in many cities. When you replace an engine with the same code, the car keeps the same paperwork and the same emission class.
Petrol versions need the correct catalytic converters and oxygen sensors on the car to stay legal and to keep the engine computer happy. Reuse the parts from your car if they are in good condition.
If you are not sure which version you need, send us your VIN. We tell you the right code for free.
See all M30 Engines · Search M30B34 in the shop
What is the difference between the M30B34 and other M30 engines?
The M30B34 makes 160 kW (218 HP) and 310 Nm. The other M30 engines are: M30B35 with 155 kW (211 HP) and 305 Nm (1982 to 1993).
Engines in one family share a basic block, but the turbo, the injection, the sensors and the engine computer can differ. A higher power version often has different pistons, a bigger turbo or a different fuel system.
This is why we ask for the exact code. Fitting a different version can work, but the wiring, the software and sometimes the gearbox must be changed to match.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
See all M30 Engines · Search M30B34 in the shop
How long does delivery of an M30B34 engine take?
Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day. Delivery to the Netherlands, Belgium, Germany, France, Luxembourg and Denmark takes 1 to 3 working days.
Spain, Italy, Portugal, Poland, Czechia, Austria, Ireland, the Nordics and the Baltics take 2 to 5 working days. Greek and Spanish islands, Malta, Cyprus and remote areas take 4 to 8 working days. The UK and other countries outside the EU are quoted one by one.
Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.
You get a tracking number when the pallet is collected. Check the wrapping before you sign, and note any damage on the paperwork.
See all M30 Engines · Search M30B34 in the shop
What should I replace when I fit a used M30B34 engine?
A used engine lasts longest when it starts life in your car with fresh fluids and new seals. Check the spark plugs and the ignition coils, and make sure the fuel lines are clean and tight before you crank the engine. Fit a new oil filter and fresh oil of the grade BMW lists for this engine, and refill the coolant with the correct BMW antifreeze mix. Use new gaskets for the exhaust manifold, the intake and the sump plug, and check every hose clip before the first start.
Look at the engine mounts and the clutch or the torque converter while the engine is out. Old mounts can crack a new engine's brackets, and a worn clutch is much easier to change now.
Before the first start, turn the engine over without fuel until the oil pressure light goes out. Then let it idle, check for leaks, and drive gently for the first few hundred kilometres.
The warranty asks for fitting by a qualified mechanic and the correct oil, coolant and filters. Keep your receipts in case you ever need to make a claim.
See all M30 Engines · Search M30B34 in the shop
Does a used M30B34 engine come with a warranty?
Yes. Eligible engines come with a 12 months warranty from the delivery date. It covers internal mechanical failure under normal use and correct fitting by a qualified mechanic or workshop.
The warranty does not cover damage from wrong fitting, overheating, low oil, wrong fluids or fuel, engines that were opened or modified without our approval, or labour and towing costs.
To claim, send us your order number, a short description of the problem, photos or a video, and a mechanic's report if we ask for one. If the claim is approved, we repair, replace or refund the engine.
Keep the receipts for the fitting, the oil and the filters. They make any claim quick and simple.
See all M30 Engines · Search M30B34 in the shop
Can you check if an M30B34 fits my car with my VIN?
Yes, and it is free. Send the 17-character VIN of your car and, if you have it, the gearbox code. We check the engine family, the build year window and the parts your car needs.
For the M30B34, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E28 M5 and BMW E24 M635CSi.
We only reserve an engine once the match is confirmed, so you never pay for the wrong unit. You can reach the Hamburg desk by email at autowerkeengines@gmail.com, or by phone and WhatsApp on +49 15510 030835, Monday to Friday, 9:00 to 16:00 CET.
You can also use the VIN check on our site. It reads the year, the make, the model and the engine from the public vehicle register.
See all M30 Engines · Search M30B34 in the shop
What is the difference between the BMW M30 engines?
BMW M30 big-six petrol engines for E28, E24, E23 and E34. We list 2 versions: M30B35 (3.5 liter (3,430 cc), 155 kW (211 HP), 1982 to 1993); M30B34 (3.4 liter (3,430 cc), 160 kW (218 HP), 1985 to 1988).
The versions share the same basic design, but the power, the turbo or injection set-up, the electronics and the emission standard change. The right one for you is the one your car was built with.
The M30 family was used in chassis E28, E34, E24, E23 and E32. Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
What should I check on a used BMW M30 engine?
Start with the basics: the engine code on the block, the recorded mileage and the photos. Make sure the code matches your car and the parts you need are on the unit.
On an M30 petrol engine, a fitter usually checks the spark plugs, the coils, the timing side and the oil seals. These parts are easy to check before fitting and easy to change if needed.
If you want more photos or a short video of a unit, ask the desk and we send them before you pay. An inspection certificate can travel with the order on request.
Once fitted, change the oil and filter early and drive gently at first. Report any problem right away so the warranty stays valid.
See all M30 Engines · Inspection certificate
Which years were BMW M30 engines made?
BMW built the M30 engines we list from about 1982 to 1993. The M30B35 ran from 1982 to 1993. The M30B34 ran from 1985 to 1988.
They went into chassis E28, E34, E24, E23 and E32. The exact year of a car matters, because BMW sometimes changed the engine version or its parts in the middle of a model's life.
Each listing in our yard names the engine year, so you can match it to the build date of your car.
Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.
Glossary
- Long block — An engine with the block, head and internals but without most ancillaries such as manifolds, turbo, alternator or starter.
- Dressed engine — An engine with most ancillaries fitted, ready to install with fewer parts transferred.
- Compression test — A measurement of the pressure each cylinder builds when cranked. Even readings show healthy rings and valves.
- Leak-down test — A test that pressurises each cylinder and measures how much air escapes, showing where any leak is.
- LCI — Life Cycle Impulse, BMW's name for a mid-life update. Engines often change at the LCI.
- xDrive — BMW's all-wheel-drive system. xDrive cars often use a different sump and oil pickup.
- DME — Digital Motor Electronics, BMW's name for the engine control unit.
- CAS, FEM and BDC — The immobiliser and body modules that must be matched to the engine control unit on modern BMWs.
- Timing chain tensioner — A hydraulic or spring device that keeps the timing chain tight. Worn tensioners cause cold-start rattle.
- TU — Technical Update, BMW's suffix for a revised version of an engine.
Our verdict
Bought with care, the M30 is a sound choice. Check the code against your VIN, ask for compression figures and photographs, replace the known weak parts while the engine is out, and fit it with fresh fluids and filters. Do that and a used M30 will give years of service.
Ready to order, or need help choosing? Browse every M30 in stock, contact the Hamburg desk or send us your VIN on WhatsApp.
