The M10 is the engine that saved BMW. Launched in 1962 in the Neue Klasse saloon, this cast-iron four-cylinder with a single overhead camshaft went on to power the 02 Series, the first 3 and 5 Series, and — in turbocharged form — the Formula One engine that won the 1983 world title.
Today the M10 is bought by restorers of E21, E30, E12 and 02 cars, by historic racers and by owners who want a period-correct unit with matching character. Units are simple, durable and easy to rebuild, but most survivors are now more than thirty-five years old, so condition matters more than mileage.
- Production: 1962–1988
- Versions covered: M10B15, M10B16, M10B18 and M10B20
- Output range: 80–125 hp
- Fuel and layout: petrol inline-4
- Fitted to: 10 BMW models across 4 chassis generations
- In our stock now: ask the desk for the next arrival — browse all M10 engines
The M10 at a glance
The table lists every M10 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 |
|---|---|---|---|---|---|
| M10B15 | 1.5 L | Inline-4, naturally aspirated | 80 hp | 118 Nm | 1962–1964 |
| M10B16 | 1.6 L | Inline-4, naturally aspirated | 90 hp | 130 Nm | 1962–1988 |
| M10B18 | 1.8 L | Inline-4, naturally aspirated | 105 hp | 145 Nm | 1962–1988 |
| M10B20 | 2.0 L | Inline-4, naturally aspirated | 125 hp | 170 Nm | 1962–1988 |
Across 4 versions, output runs from 80 to 125 hp. The spread reflects different capacities, tuning for different markets and the technical updates BMW made over 27 years of production.
History of the M10
BMW designed the M10 under Alex von Falkenhausen with a canted block, a chain-driven camshaft and a crossflow aluminium head. It grew from 1.5 to 2.0 litres, moved from twin Solex carburettors to Kugelfischer mechanical injection, then to Bosch K-Jetronic and L-Jetronic, and survived until 1988 in the E30 316 and 318.
1962: the M10B15 arrived with 1.5 L and 80 hp in the BMW 115 1500 and BMW 116 1600.
1962: the M10B16 arrived with 1.6 L and 90 hp in the BMW E21 316 and BMW E30 316. Compared with the M10B15, it added 10 hp.
1962: the M10B18 arrived with 1.8 L and 105 hp in the BMW E21 318, BMW E30 318 and BMW E12 518. Compared with the M10B16, it added 15 hp.
1962: the M10B20 arrived with 2.0 L and 125 hp in the BMW E12 520, BMW E21 320 and BMW E28 520. Compared with the M10B18, it added 20 hp.
Every M10 version explained
M10B15 (1.5 L, 80 hp)
M10B15: 1.5 L, inline-4, petrol, naturally aspirated. Output is 80 hp with 118 Nm of torque, and production ran from 1962 to 1964. That is about 53 hp and 79 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M10 family, the M10B16 (90 hp), M10B18 (105 hp) and M10B20 (125 hp) are more powerful. It was fitted to the BMW 115 1500 and BMW 116 1600.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 10 is the family number; B stands for petrol (from the German Benzin); 15 is the capacity in decilitres, so 1.5 litres.
M10B16 (1.6 L, 90 hp)
Built from 1962 to 1988, the M10B16 displaces 1.6 L in an inline-4 layout and is naturally aspirated. It produces 90 hp and 130 Nm on petrol. That is about 56 hp and 81 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M10 family, the M10B18 (105 hp) and M10B20 (125 hp) are more powerful, while the M10B15 (80 hp) is milder. It was fitted to the BMW E21 316 and BMW E30 316.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 10 is the family number; B stands for petrol (from the German Benzin); 16 is the capacity in decilitres, so 1.6 litres.
M10B18 (1.8 L, 105 hp)
M10B18: 1.8 L, inline-4, petrol, naturally aspirated. Output is 105 hp with 145 Nm of torque, and production ran from 1962 to 1988. That is about 58 hp and 81 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M10 family, the M10B20 (125 hp) is more powerful, while the M10B15 (80 hp) and M10B16 (90 hp) are milder. It was fitted to the BMW E21 318, BMW E30 318 and BMW E12 518.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 10 is the family number; B stands for petrol (from the German Benzin); 18 is the capacity in decilitres, so 1.8 litres.
M10B20 (2.0 L, 125 hp)
Built from 1962 to 1988, the M10B20 displaces 2.0 L in an inline-4 layout and is naturally aspirated. It produces 125 hp and 170 Nm on petrol. That is about 63 hp and 85 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M10 family, it is the most powerful version, while the M10B15 (80 hp), M10B16 (90 hp) and M10B18 (105 hp) are milder. It was fitted to the BMW E12 520, BMW E21 320 and BMW E28 520.
Reading the code: M marks an M-series code, the naming BMW used for its engine families up to the early 2000s; 10 is the family number; B stands for petrol (from the German Benzin); 20 is the capacity in decilitres, so 2.0 litres.
Which cars use the M10
The M10 was fitted to 10 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.
Other models with the M10
The M10 also powered the 115 1500 (M10B15, 80 hp) and 116 1600 (M10B15, 80 hp).
BMW E21 first 3 Series (1975–1983)
In the first 3 Series, built 1975–1983 as a two-door saloon, the M10 powered the 316 (M10B16, 90 hp), 318 (M10B18, 105 hp) and 320 (M10B20, 125 hp).
For an E21, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update.
BMW E30 second 3 Series (1982–1994)
In the second 3 Series, built 1982–1994 as a saloon, Touring, coupé, convertible, the M10 powered the 316 (M10B16, 90 hp) and 318 (M10B18, 105 hp).
When ordering for an E30, 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 E30 engines in stock.
BMW E12 first 5 Series (1972–1981)
In the first 5 Series, built 1972–1981 as a saloon, the M10 powered the 518 (M10B18, 105 hp) and 520 (M10B20, 125 hp).
When ordering for an E12, 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.
BMW E28 second 5 Series (1981–1988)
In the second 5 Series, built 1981–1988 as a saloon, the M10 powered the 520 (M10B20, 125 hp).
The quickest way to confirm the right M10 for your E28 is to send us the VIN; we check the engine code, the gearbox and the drive type. All E28 engines in stock.
Will an M10 fit my BMW? Model-by-model answers
Short answers for every model that left the factory with an M10, with prices from our current stock.
Will the M10B15 fit my BMW 115 1500?
Yes, the BMW 115 1500 left the factory with the M10B15, so an M10B15 from another car is the direct replacement. 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 115 1500?
We do not have an M10B15 on the shelf for the 115 1500 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 M10B15 fit my BMW 116 1600?
Yes, the BMW 116 1600 left the factory with the M10B15, so an M10B15 from another car is the direct replacement. 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 116 1600?
We do not have an M10B15 on the shelf for the 116 1600 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 M10B16 fit my BMW E21 316?
The M10B16 is the original engine for the BMW E21 316, which makes it the straightforward choice. The first 3 Series was built 1975–1983, and the M10B16 was produced 1962–1988, 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 E21 316?
We do not have an M10B16 on the shelf for the E21 316 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 M10B16 fit my BMW E30 316?
The M10B16 is the original engine for the BMW E30 316, which makes it the straightforward choice. The second 3 Series was built 1982–1994, and the M10B16 was produced 1962–1988, 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 E30 316?
We do not have an M10B16 on the shelf for the E30 316 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 M10B18 fit my BMW E21 318?
The M10B18 is the original engine for the BMW E21 318, which makes it the straightforward choice. The first 3 Series was built 1975–1983, and the M10B18 was produced 1962–1988, 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 E21 318?
We do not have an M10B18 on the shelf for the E21 318 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 M10B18 fit my BMW E30 318?
For the BMW E30 318, the M10B18 is the factory engine and the one to order. The second 3 Series was built 1982–1994, and the M10B18 was produced 1962–1988, 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 E30 318?
We do not have an M10B18 on the shelf for the E30 318 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 M10B18 fit my BMW E12 518?
For the BMW E12 518, the M10B18 is the factory engine and the one to order. The first 5 Series was built 1972–1981, and the M10B18 was produced 1962–1988, 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 518?
We do not have an M10B18 on the shelf for the E12 518 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 M10B20 fit my BMW E12 520?
Yes, the BMW E12 520 left the factory with the M10B20, so an M10B20 from another car is the direct replacement. The first 5 Series was built 1972–1981, and the M10B20 was produced 1962–1988, 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 520?
We do not have an M10B20 on the shelf for the E12 520 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 M10B20 fit my BMW E21 320?
The M10B20 is the original engine for the BMW E21 320, which makes it the straightforward choice. The first 3 Series was built 1975–1983, and the M10B20 was produced 1962–1988, 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 E21 320?
We do not have an M10B20 on the shelf for the E21 320 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 M10B20 fit my BMW E28 520?
Yes, the BMW E28 520 left the factory with the M10B20, so an M10B20 from another car is the direct replacement. The second 5 Series was built 1981–1988, and the M10B20 was produced 1962–1988, 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 520?
We do not have an M10B20 on the shelf for the E28 520 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.
M10 model-year guide
Use this year-by-year guide to see which M10 versions were in production when your car was built.
1962 — M10B15, M10B16, M10B18 and M10B20 were in production. New this year: M10B15, M10B16, M10B18 and M10B20.
1963 — M10B15, M10B16, M10B18 and M10B20 were in production.
1964 — M10B15, M10B16, M10B18 and M10B20 were in production. Last year for M10B15.
1965 — M10B16, M10B18 and M10B20 were in production.
1966 — M10B16, M10B18 and M10B20 were in production.
1967 — M10B16, M10B18 and M10B20 were in production.
1968 — M10B16, M10B18 and M10B20 were in production.
1969 — M10B16, M10B18 and M10B20 were in production.
1970 — M10B16, M10B18 and M10B20 were in production.
1971 — M10B16, M10B18 and M10B20 were in production.
1972 — M10B16, M10B18 and M10B20 were in production.
1973 — M10B16, M10B18 and M10B20 were in production.
1974 — M10B16, M10B18 and M10B20 were in production.
1975 — M10B16, M10B18 and M10B20 were in production.
1976 — M10B16, M10B18 and M10B20 were in production.
1977 — M10B16, M10B18 and M10B20 were in production.
1978 — M10B16, M10B18 and M10B20 were in production.
1979 — M10B16, M10B18 and M10B20 were in production.
1980 — M10B16, M10B18 and M10B20 were in production.
1981 — M10B16, M10B18 and M10B20 were in production.
1982 — M10B16, M10B18 and M10B20 were in production.
1983 — M10B16, M10B18 and M10B20 were in production.
1984 — M10B16, M10B18 and M10B20 were in production.
1985 — M10B16, M10B18 and M10B20 were in production.
1986 — M10B16, M10B18 and M10B20 were in production.
1987 — M10B16, M10B18 and M10B20 were in production.
1988 — M10B16, M10B18 and M10B20 were in production. Last year for M10B16, M10B18 and M10B20.
Common M10 problems and what to check
No engine is perfect. These are the faults our workshop sees most often on the M10, what causes them and how to check a used unit before you buy.
Camshaft and rocker wear
Lobes and rocker pads wear when the oil spray bar is blocked or oil changes were neglected. A worn cam loses lift and the engine feels flat above 4,000 rpm.
How to check: Remove the rocker cover and look at the lobes and rocker faces for pitting or a polished flat.
Timing chain guides and tensioner
The duplex chain lasts well, but the plastic guide and the spring tensioner age. A rattle on a cold start that fades as oil pressure builds is the usual sign.
How to check: Listen at the front cover during the first seconds after a cold start.
Warped head after overheating
The aluminium head on an iron block does not forgive an overheat. A warped head shows as coolant loss, white exhaust smoke or oil in the coolant.
How to check: Ask for a compression or leak-down test and check the coolant for oil.
Valve stem seals
Hardened seals let oil run down the guides overnight, so the engine puffs blue smoke on start-up and then clears.
How to check: Watch the exhaust for the first ten seconds after a cold start.
Oil leaks from age
Rear main seal, timing cover and sump gaskets all seep after decades. Leaks are not fatal but should be priced into the job.
How to check: Look under the bellhousing and around the front cover for fresh oil.
Diagnosing a failing M10: 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 M10 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 M10?
As a rule, bolt-on faults are worth repairing and internal damage is not. Seals, sensors, coils, injectors, pumps and turbos can be replaced in the car. Once the bearings, crankshaft, bores or head of an M10 are damaged, a used engine is usually cheaper and quicker than a rebuild.
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.
M10 maintenance and running costs
| Item | Recommendation |
|---|---|
| Engine oil | A good 15W-40 or 20W-50 mineral or semi-synthetic oil with zinc protection for flat-tappet cams, about 4.0 to 4.5 litres with filter. |
| Timing drive | Single-row or duplex timing chain on the front of the engine; no scheduled change, inspect guides when the head is off. |
| Service interval | Oil every 5,000 to 7,500 km for a classic driven in short trips; valve clearances checked every 15,000 km. |
Valve clearance is adjusted cold with eccentric adjusters on the rocker arms. Fit a new spray bar if the old one is blocked or loose.
Shorter oil intervals than the factory maximum are the cheapest insurance for an M10. Most of the expensive faults on BMW engines start with tired oil.
Buying a used M10: the full checklist
Work through these points before you order a used M10, 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.
M10 prices: what you should pay
We do not have an M10 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.
M10 engines in stock now
Fitting a replacement M10
These are the steps we recommend to every workshop fitting one of our M10 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
The M10 responds to a sharper camshaft, a 2.0 litre conversion on 1.8 cars and twin Weber or Dellorto carburettors. Historic racers often fit a 2002 tii head and injection. Keep the original block if the car's identity matters.
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.
M10 compared with similar BMW engines
Buyers often compare the M10 with these engines. Here is how they line up.
| Engine | Power | Years | Median price in stock |
|---|---|---|---|
| M10 | 80–125 hp | 1962–1988 | on request |
| M40 | 102–113 hp | 1987–1994 | on request |
| M43 | 102–118 hp | 1993–2002 | on request |
| N43 | 122–170 hp | 2007–2011 | 848,00 € |
The M40 is milder (up to 113 hp against 125 hp) and uses rubber timing belt with tensioner, changed on time. Its best-known faults are timing belt and camshaft lobe wear. Read the M40 guide.
The M43 is milder (up to 118 hp against 125 hp) and uses single-row timing chain with a plastic guide rail and hydraulic tensioner. Its best-known faults are timing chain guide rail and valve cover gasket leaks. Read the M43 guide.
The N43 reaches higher outputs (up to 170 hp against 125 hp) and uses timing chain at the front. Its best-known faults are piezo injectors and ignition coils and spark plugs. Read the N43 guide.
Delivery, warranty and payment
Before an M10 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.
Every engine carries a 12-month warranty on eligible internal failure when a qualified workshop fits it with new fluids and filters. Payment is by card, bank transfer or crypto; your invoice is emailed as soon as you order.
We deliver M10 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 M10
Will the M10B18 engine fit my BMW E30 316?
Yes, if your BMW E30 316 was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E30 316 from about 1975 to 1988.
In our records the M10B18 is the engine for the E30 316, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E30 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 M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E30 316?
A used M10B18 for the BMW E30 316 costs from about 800 € to 1.450 € 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 M10B18 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 M10 Engines · Search M10B18 in the shop
Will the M10B18 engine fit my BMW E30 318i?
Yes, if your BMW E30 318i was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E30 318i from about 1975 to 1988.
Some E30 318i cars were built with a different engine: the M40B18. These look alike from the outside, so check the code on your engine or send us your VIN.
Also tell us if your E30 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 M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E30 318i?
A used M10B18 for the BMW E30 318i costs from about 800 € to 1.450 € 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 M10B18 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 M10 Engines · Search M10B18 in the shop
Will the M10B18 engine fit my BMW E21 316?
Yes, if your BMW E21 316 was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E21 316 from about 1975 to 1988.
In our records the M10B18 is the engine for the E21 316, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E21 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 M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E21 316?
A used M10B18 for the BMW E21 316 costs from about 800 € to 1.450 € 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 M10B18 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 M10 Engines · Search M10B18 in the shop
Will the M10B18 engine fit my BMW E21 318i?
Yes, if your BMW E21 318i was built with the M10B18. BMW used this 1.8 liter (1,766 cc) petrol engine with 77 kW (105 HP) in the E21 318i from about 1975 to 1988.
In our records the M10B18 is the engine for the E21 318i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E21 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 M10 Engines · Search M10B18 in the shop
How much is a replacement M10B18 engine for a BMW E21 318i?
A used M10B18 for the BMW E21 318i costs from about 800 € to 1.450 € 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 M10B18 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 M10 Engines · Search M10B18 in the shop
What is the BMW M10B18 engine?
The BMW M10B18 is a 1.8 liter (1,766 cc) petrol engine from the M10 family. It has an inline 4, SOHC, 8 valve layout with no turbo (naturally aspirated), and makes 77 kW (105 HP) with 145 Nm of torque. BMW built it from 1975 to 1988 and it meets the Euro 1 emission standard.
You find the M10B18 in the BMW E30 316, BMW E30 318i, BMW E21 316 and BMW E21 318i. What we list: BMW M10 four-cylinder petrol engines for E30 316 and E21.
At Autowerke Engines every M10B18 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 M10 Engines · Search M10B18 in the shop
How much does a used BMW M10B18 engine cost?
A used BMW M10B18 engine in our yard usually costs between 800 € and 1.450 €. 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 M10 Engines · Search M10B18 in the shop
Which cars use the BMW M10B18 engine?
BMW fitted the M10B18 to the BMW E30 316, BMW E30 318i, BMW E21 316 and BMW E21 318i. These cars were built with this engine from about 1975 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.
The M10B18 is the only M10 version we list, which makes it easy to pick, but the wiring and the engine computer still need to match 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.
See all M10 Engines · Search M10B18 in the shop
How much power and torque does the BMW M10B18 have?
From the factory the BMW M10B18 makes 77 kW (105 HP) and 145 Nm of torque. It is a 1.8 liter (1,766 cc) inline 4, SOHC, 8 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 M10B18 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 M10 Engines · Search M10B18 in the shop
How do I know a used M10B18 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 M10B18, 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 M10 Engines · Search M10B18 in the shop
What comes with a used M10B18 engine?
Each M10B18 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 M10 Engines · Search M10B18 in the shop
Is the BMW M10B18 a diesel or petrol engine?
The M10B18 is a petrol engine. It is a 1.8 liter (1,766 cc) inline 4, SOHC, 8 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 M10 Engines · Search M10B18 in the shop
Are there other versions of the BMW M10B18?
In our yard the M10B18 is the only listed version of the M10 family. It makes 77 kW (105 HP) and 145 Nm, and was built from 1975 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 M10 Engines · Search M10B18 in the shop
How long does delivery of an M10B18 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 M10 Engines · Search M10B18 in the shop
What should I replace when I fit a used M10B18 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 M10 Engines · Search M10B18 in the shop
Does a used M10B18 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 M10 Engines · Search M10B18 in the shop
Can you check if an M10B18 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 M10B18, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E30 316, BMW E30 318i, BMW E21 316 and BMW E21 318i.
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 M10 Engines · Search M10B18 in the shop
What should I know about the BMW M10 engine?
BMW M10 four-cylinder petrol engines for E30 316 and E21. We list one version: M10B18 (1.8 liter (1,766 cc), 77 kW (105 HP), 1975 to 1988).
Because there is only one version, the code is easy to match. You still need the engine computer and wiring that suit your car.
The M10 family was used in chassis E30 and E21. 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.
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 M10 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 M10 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.
Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide. 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 M10 Engines · Inspection certificate
Which years were BMW M10 engines made?
BMW built the M10 engines we list from about 1975 to 1988. The M10B18 ran from 1975 to 1988.
They went into chassis E30 and E21. 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.
More answers from the Hamburg desk
These are further questions buyers ask us when choosing a replacement engine, answered by the people who check, pack and ship the engines.
Can I reuse parts from my old engine?
Often yes. Turbos, injectors, the alternator and other ancillaries can move over if they are in good condition.
Parts that failed with the old engine, or that look worn, should be replaced. A worn turbo can damage a good engine.
Always use new gaskets and seals where parts are moved over.
Our listings show what is fitted to each unit, so you can plan what to reuse.
Do you sell to workshops and trade customers?
Yes. Many of our customers are workshops, dealers and fleet owners.
Approved workshops and fleet operators can order on 30-day terms. Write to autowerkeengines@gmail.com with your company details to apply.
Trade customers get the same checks and photos on every engine, and a VAT invoice with every order.
Ask the desk about regular orders or sourcing a specific engine.
Do I pay customs or import duty?
Inside the EU, there is no import duty and no customs paperwork.
For the UK, Switzerland, Norway and other non-EU countries, the receiver pays import duty and local VAT.
We supply a commercial invoice and origin documents where they apply, which makes customs clearance faster.
Ask the desk for a delivery quote for your country before you order.
How long does engine delivery to the Canary Islands take?
Delivery from our Hamburg yard to the Canary Islands takes 4 to 8 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.
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.
The Canary Islands is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.
The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.
Should a workshop fit my engine?
Yes. The warranty asks that the engine is fitted by a qualified mechanic or workshop.
An engine swap involves lifting gear, wiring, coding and fluids. A workshop has the tools and the know-how to do it right.
Ask your workshop to keep a record of the fluids and parts they use.
If your workshop has questions about the unit, they can call the desk directly.
What is the inspection certificate?
The inspection certificate is a sheet that records the unit that leaves our yard.
It notes that the engine or gearbox code was checked against the listing, that the parts were recorded as fitted, that the openings were sealed, and that the unit was photographed and packed with a tracking number.
You can ask for the certificate on any unit in the yard. It is sent with the order confirmation.
Many buyers keep it with the car's service papers.
How do I buy an engine from Autowerke Engines?
Find the engine in the shop, check the code, the year and the mileage, and add it to the cart. At checkout you enter your details and pick a payment method.
After the order, we confirm the unit and send the payment details. Card payments use a secure link that we email to you, so your card number is never typed on our site.
If you are not sure the engine fits, send us your VIN before you order. The check is free.
Once paid, the engine is packed on a pallet and leaves Hamburg with tracking.
How do I make a warranty claim?
Contact the desk with your order number, a short description of the problem, and photos or a video.
We may ask for a mechanic's inspection report.
If the claim is approved, we repair, replace or refund the engine.
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.
How long does engine delivery to Poland take?
Delivery from our Hamburg yard to Poland takes 2 to 5 working days after dispatch. Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.
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.
Poland is in the EU customs area for this shipment, so there is no import duty and no customs paperwork.
The carrier delivers to the kerb or a loading bay. Please have a forklift, a pallet truck or an engine crane ready, and check the wrapping before you sign.
Can I reserve an engine before I pay?
Yes. Once your order is placed, the unit is held for you while the payment comes in.
With a bank transfer, we hold the unit for five working days while the money clears. With USDT or Bitcoin, the unit stays reserved until the transfer is confirmed.
If you need more time, talk to the desk. We are flexible for workshops and repeat customers.
We only reserve an engine once we know it fits, so send your VIN first if you are not sure.
Is it safe to pay by card?
Yes. Card payments are handled by trusted payment providers with industry-standard encryption.
You never type your card number on our site. We email you a secure payment link after you place the order, and 3-D Secure applies.
Payment is taken when the order is confirmed.
We do not store any card details.
Can I order more than one engine on one order?
Yes. You can add several engines, gearboxes or kits to one cart.
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.
Large orders may ship on more than one pallet. We tell you how they will travel before dispatch.
For bulk orders, ask the desk. We can bundle units and paperwork to make it easy.
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
The M10 rewards owners who understand it. 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 M10 will give years of service.
Ready to order, or need help choosing? Browse every M10 in stock, contact the Hamburg desk or send us your VIN on WhatsApp.
