BMW built the M52B20 from 1994 to 2000. It is a 2.0 L naturally aspirated petrol inline-6 with 150 hp and 190 Nm, part of the M52 family. You will find it in the BMW E36 320i, BMW E39 520i and BMW Z3 2.0.
This guide is about the M52B20 specifically: its specification, the cars that use it, how it differs from the other M52 versions, what to check, prices from our stock and fitment answers for each model. For the history of the whole family, read our M52 guide.
- Capacity and layout: 2.0 L, inline-6, naturally aspirated
- Output: 150 hp and 190 Nm
- Production: 1994–2000
- Fitted to: 3 models across 3 chassis generations
- In our stock: 5 units from 1.311,00 €
M52B20 specifications
| Item | Value |
|---|---|
| Engine code | M52B20 |
| Family | M52 |
| Capacity | 2.0 L |
| Layout | Inline-6 |
| Fuel | Petrol |
| Aspiration | Naturally aspirated |
| Power | 150 hp |
| Torque | 190 Nm |
| Specific output | 75 hp per litre |
| Production | 1994–2000 |
| Models | 3 |
Built from 1994 to 2000, the M52B20 displaces 2.0 L in an inline-6 layout and is naturally aspirated. It produces 150 hp and 190 Nm on petrol. That is about 75 hp and 95 Nm per litre, a strong figure for a road engine of its era. Within the M52 family, the M52B25 (170 hp), M52B28 (193 hp) and M52TUB28 (193 hp) are more powerful. It was fitted to the BMW E36 320i, BMW E39 520i and BMW Z3 2.0.
What the code M52B20 means
- M marks an M-series code, the naming BMW used for its engine families up to the early 2000s.
- 52 is the family number.
- B stands for petrol (from the German Benzin).
- 20 is the capacity in decilitres, so 2.0 litres.
Which BMW models use the M52B20
| Model | Generation | Built |
|---|---|---|
| BMW E36 320i | third 3 Series | 1990–2000 |
| BMW E39 520i | fourth 5 Series | 1995–2004 |
| BMW Z3 2.0 | Z3 roadster and coupé | 1995–2002 |
In the E36 third 3 Series (1990–2000), the M52B20 powered the 320i. We have 1 M52B20 unit from E36 donor cars. All E36 engines
In the E39 fourth 5 Series (1995–2004), the M52B20 powered the 520i. We have 1 M52B20 unit from E39 donor cars. All E39 engines
In the Z3 Z3 roadster and coupé (1995–2002), the M52B20 powered the 2.0. We have 1 M52B20 unit from Z3 donor cars. All Z3 engines
M52B20 compared with other M52 versions
| Code | Capacity | Power | Torque | Years |
|---|---|---|---|---|
| M52B20 | 2.0 L | 150 hp | 190 Nm | 1994–2000 |
| M52B25 | 2.5 L | 170 hp | 245 Nm | 1995–2000 |
| M52B28 | 2.8 L | 193 hp | 280 Nm | 1995–2000 |
| M52TUB28 | 2.8 L | 193 hp | 280 Nm | 1998–2000 |
M52B20 or M52B25?
The M52B25 has 20 hp more than the M52B20 (170 against 150 hp), from 2.5 L instead of 2.0 L, and was built 1995–2000. A different capacity means a different crankshaft, pistons or head, and different software. It can be fitted as an upgrade with the matching engine control unit and wiring, but it is a conversion rather than a straight replacement.
M52B20 or M52B28?
The M52B28 has 43 hp more than the M52B20 (193 against 150 hp), from 2.8 L instead of 2.0 L, and was built 1995–2000. A different capacity means a different crankshaft, pistons or head, and different software. It can be fitted as an upgrade with the matching engine control unit and wiring, but it is a conversion rather than a straight replacement.
M52B20 or M52TUB28?
The M52TUB28 has 43 hp more than the M52B20 (193 against 150 hp), from 2.8 L instead of 2.0 L, and was built 1998–2000. A different capacity means a different crankshaft, pistons or head, and different software. It can be fitted as an upgrade with the matching engine control unit and wiring, but it is a conversion rather than a straight replacement.
Common M52B20 problems
The M52B20 shares its weak points with the rest of the M52 family. These are the faults to check on a used unit and on your own engine. The full explanation of each is in the M52 guide.
| Known fault | What to check |
|---|---|
| Nikasil bore wear | A compression or leak-down test is the only reliable check; Alusil and iron-block units are not affected. |
| Cooling system | Look at the date of the last cooling refresh and check for a metal impeller. |
| VANOS seals and solenoids | Listen for a diesel-like rattle at idle and check for torque loss low down. |
| DISA valve (M52TU) | Remove the DISA valve and check the flap pin for play. |
| Crankcase ventilation | Look for oil in the intake and smoke on start. |
DISA valve (M52TU). The flap inside the DISA valve can break and be drawn into the engine.
M52B20 maintenance
- 5W-30 or 5W-40 synthetic to BMW Longlife standard, about 6.5 litres with filter.
- Oil every 10,000 to 15,000 km; VANOS seals and cooling every 100,000 km.
- Duplex lower and single upper chains at the front with hydraulic tensioner.
Will the M52B20 fit my car?
Will the M52B20 fit my BMW E36 320i?
Yes, the BMW E36 320i left the factory with the M52B20, so an M52B20 from another car is the direct replacement. The third 3 Series was built 1990–2000, and the M52B20 was produced 1994–2000, 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 E36 320i?
We have 1 M52B20 engine from E36 donor cars, priced from 3.000,00 €. Delivery to your door is included, and the engine carries a 12-month warranty when fitted by a qualified workshop. Add fitting labour and the parts you replace at the same time — seals, cooling parts and mounts — to estimate the total.
Will the M52B20 fit my BMW E39 520i?
The M52B20 is the original engine for the BMW E39 520i, which makes it the straightforward choice. The fourth 5 Series was built 1995–2004, and the M52B20 was produced 1994–2000, 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 E39 520i?
We have 1 M52B20 engine from E39 donor cars, priced from 1.320,00 €. Delivery to your door is included, and the engine carries a 12-month warranty when fitted by a qualified workshop. Add fitting labour and the parts you replace at the same time — seals, cooling parts and mounts — to estimate the total.
Will the M52B20 fit my BMW Z3 2.0?
For the BMW Z3 2.0, the M52B20 is the factory engine and the one to order. The Z3 roadster and coupé was built 1995–2002, and the M52B20 was produced 1994–2000, 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 Z3 2.0?
We have 1 M52B20 engine from Z3 donor cars, priced from 1.311,00 €. Delivery to your door is included, and the engine carries a 12-month warranty when fitted by a qualified workshop. Add fitting labour and the parts you replace at the same time — seals, cooling parts and mounts — to estimate the total.
M52B20 prices
Our M52B20 stock runs to 5 units, priced from 1.311,00 € to 3.000,00 € with a median of 1.414,00 €.
Prices depend on the exact version, the donor's mileage, how complete the engine is and the demand for that code. Higher-output versions, low mileage and dressed engines with turbo, injectors and ancillaries cost more; long blocks and higher mileage cost less.
M52B20 engines in stock
Here is a selection of M52B20 engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.
BMW E36 320i M52B20 Engine, Premium Grade — 3.000,00 €, reduced from 3.600,00 €. It comes from a recorded donor car, and 9 units are available. The listing shows every side of the engine and the fitted parts.
BMW Z3 2.0 M52B20 Complete Engine — 1.311,00 €, reduced from 1.900,00 €. It comes from a recorded donor car, and 27 units are available. Ask the desk for compression figures or extra photographs before you order.
Buying a used M52B20: checklist
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- VANOS operation. Rough idle, a rattle from the front of the head and a loss of torque at low revs point to VANOS seals or solenoids. These are serviceable parts and are easier to renew with the engine out.
- Bore coating. Early engines with Nikasil bores can be damaged by high-sulphur fuel. A compression or leak-down test is the only reliable check; units with Alusil or iron bores are not affected.
- Plastic cooling parts. Expansion tanks, thermostat housings and water pump impellers made of plastic crack with age. Plan to replace them when the engine is fitted.
Questions about the M52B20
How much is a replacement M52B28 engine for a BMW E38 728i?
A used M52B28 for the BMW E38 728i costs from about 1.500 € to 2.450 € 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 M52B28 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 M52 Engines · Search M52B28 in the shop
Is the BMW M52B28 a diesel or petrol engine?
The M52B28 is a petrol engine. It is a 2.8 liter (2,793 cc) inline 6, DOHC, 24 valve unit with no turbo (naturally aspirated), and it was built to the Euro 2 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 M52 Engines · Search M52B28 in the shop
How much is a replacement M52B28 engine for a BMW E39 528i?
A used M52B28 for the BMW E39 528i costs from about 1.500 € to 2.450 € 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 M52B28 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 M52 Engines · Search M52B28 in the shop
What is the difference between the BMW M52 engines?
BMW M52 petrol engines for E36, E39, E46 and Z3. We list 2 versions: M52B28 (2.8 liter (2,793 cc), 142 kW (193 HP), 1995 to 2000); M52B25 (2.5 liter (2,494 cc), 125 kW (170 HP), 1995 to 2000).
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 M52 family was used in chassis E36, E39, E46, Z3 and E38. 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.
Which cars use the BMW M52B25 engine?
BMW fitted the M52B25 to the BMW E36 323i, BMW E39 523i and BMW E46 323i. These cars were built with this engine from about 1995 to 2000.
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 M52 family are the M52B28 (193 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 M52 Engines · Search M52B25 in the shop
How much power and torque does the BMW M52B28 have?
From the factory the BMW M52B28 makes 142 kW (193 HP) and 280 Nm of torque. It is a 2.8 liter (2,793 cc) inline 6, DOHC, 24 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 M52B28 on our site lists its year and mileage. If you want more photos or a short video of a unit, ask the desk and we send them before you pay.
See all M52 Engines · Search M52B28 in the shop
Will the M52B28 engine fit my BMW E39 528i?
Yes, if your BMW E39 528i was built with the M52B28. BMW used this 2.8 liter (2,793 cc) petrol engine with 142 kW (193 HP) in the E39 528i from about 1995 to 2000.
In our records the M52B28 is the engine for the E39 528i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E39 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 M52 Engines · Search M52B28 in the shop
Will the M52B25 engine fit my BMW E36 323i?
Yes, if your BMW E36 323i was built with the M52B25. BMW used this 2.5 liter (2,494 cc) petrol engine with 125 kW (170 HP) in the E36 323i from about 1995 to 2000.
In our records the M52B25 is the engine for the E36 323i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E36 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 M52 Engines · Search M52B25 in the shop
Will the M52B28 engine fit my BMW Z3 2.8?
Yes, if your BMW Z3 2.8 was built with the M52B28. BMW used this 2.8 liter (2,793 cc) petrol engine with 142 kW (193 HP) in the Z3 2.8 from about 1995 to 2000.
In our records the M52B28 is the engine for the Z3 2.8, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your Z3 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 M52 Engines · Search M52B28 in the shop
Which years were BMW M52 engines made?
BMW built the M52 engines we list from about 1995 to 2000. The M52B28 ran from 1995 to 2000. The M52B25 ran from 1995 to 2000.
They went into chassis E36, E39, E46, Z3 and E38. 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.
What comes with a used M52B25 engine?
Each M52B25 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 M52 Engines · Search M52B25 in the shop
Can you check if an M52B25 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 M52B25, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E36 323i, BMW E39 523i and BMW E46 323i.
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 M52 Engines · Search M52B25 in the shop
Delivery, warranty and payment
Every M52B20 we sell is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped before it leaves Hamburg. You receive photographs of the packed engine and a tracking number.
Delivery is door to door and included in the price. Most European addresses receive the engine within five to ten working days; Germany and its neighbours are usually faster.
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.
