BMW M31, M337 and S70 engine: the complete buyer's guide

These are three of BMW's rarest engines. The M31 is the turbocharged 2.0 litre from the 1973 2002 Turbo, Europe's first turbocharged production car. The M337 is the 2.0 litre six from the 501 and 502 saloons of the 1950s. The S70 is the 6.1 litre V12 that BMW Motorsport built for the McLaren F1.

They are collector's pieces. Buyers are restorers, museums and specialist builders, and documentation matters as much as condition.

• Production: 1952–1998
• Versions covered: M337, M31 and S70B56
• Output range: 65–627 hp
• Fuel and layout: petrol inline-6, petrol inline-4 and petrol V12
• Fitted to: 6 BMW models across 1 chassis generations
• In our stock now: ask the desk for the next arrival — browse all M31, M337 and S70 engines

The M31, M337 and S70 at a glance

The table lists every M31, M337 and S70 version we supply with its capacity, layout, output and production years. Use it with your car's engine code to find the right unit.

Across 3 versions, output runs from 65 to 627 hp. The spread reflects different capacities, tuning for different markets and the technical updates BMW made over 47 years of production.

History of the M31, M337 and S70

The M31 combined the M10 with a KKK turbocharger and Kugelfischer mechanical injection to make 170 hp. The M337 descended from BMW's pre-war sixes. The S70/2 was designed by Paul Rosche's team for Gordon Murray's McLaren F1 and produced 627 hp.

1952: the M337 arrived with 2.0 L and 65 hp in the BMW 501 2.0 and BMW 501A.

1973: the M31 arrived with 2.0 L and 170 hp in the BMW E20 2002 Turbo and BMW 2002 Turbo. Compared with the M337, it added 105 hp.

1993: the S70B56 arrived with 6.1 L and 627 hp in the McLaren F1 and McLaren F1 GTR. Compared with the M31, it added 457 hp.

Every M31, M337 and S70 version explained

M337 (2.0 L, 65 hp)

M337: 2.0 L, inline-6, petrol, naturally aspirated. Output is 65 hp with 130 Nm of torque, and production ran from 1952 to 1958. That is about 33 hp and 65 Nm per litre, a relaxed tune aimed at torque, durability and economy. Within the M31, M337 and S70 family, the M31 (170 hp) and S70B56 (627 hp) are more powerful. It was fitted to the BMW 501 2.0 and BMW 501A.

M31 (2.0 L, 170 hp)

Built from 1973 to 1975, the M31 displaces 2.0 L in an inline-4 layout and is turbocharged. It produces 170 hp and 240 Nm on petrol. That is about 85 hp and 120 Nm per litre, a strong figure for a road engine of its era. Within the M31, M337 and S70 family, the S70B56 (627 hp) is more powerful, while the M337 (65 hp) is milder. It was fitted to the BMW E20 2002 Turbo and BMW 2002 Turbo.

S70B56 (6.1 L, 627 hp)

S70B56: 6.1 L, V12, petrol, naturally aspirated. Output is 627 hp with 650 Nm of torque, and production ran from 1993 to 1998. That is about 103 hp and 107 Nm per litre, a strong figure for a road engine of its era. Within the M31, M337 and S70 family, it is the most powerful version, while the M337 (65 hp) and M31 (170 hp) are milder. It was fitted to the McLaren F1 and McLaren F1 GTR.

Reading the code: S marks an S-series code, reserved for engines developed by BMW M; 70 is the family number; B stands for petrol (from the German Benzin); 56 is the capacity in decilitres, so 5.6 litres.

Which cars use the M31, M337 and S70

The M31, M337 and S70 was fitted to 6 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 M31, M337 and S70

The M31, M337 and S70 also powered the 501 2.0 (M337, 65 hp), 501A (M337, 65 hp), 2002 Turbo (M31, 170 hp), McLaren F1 (S70B56, 627 hp) and McLaren F1 GTR (S70B56, 627 hp).

BMW E20 02 Series (1966–1977)

In the 02 Series, built 1966–1977 as a two-door saloon, Touring, cabriolet, the M31, M337 and S70 powered the 2002 Turbo (M31, 170 hp).

For an E20, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update.

Will an M31, M337 and S70 fit my BMW? Model-by-model answers

Short answers for every model that left the factory with an M31, M337 and S70, with prices from our current stock.

Will the M337 fit my BMW 501 2.0?

For the BMW 501 2.0, the M337 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 501 2.0?

We do not have an M337 on the shelf for the 501 2.0 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 M337 fit my BMW 501A?

Yes, the BMW 501A left the factory with the M337, so an M337 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 501A?

We do not have an M337 on the shelf for the 501A 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 M31 fit my BMW E20 2002 Turbo?

Yes, the BMW E20 2002 Turbo left the factory with the M31, so an M31 from another car is the direct replacement. The 02 Series was built 1966–1977, and the M31 was produced 1973–1975, 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 E20 2002 Turbo?

We do not have an M31 on the shelf for the E20 2002 Turbo 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 M31 fit my BMW 2002 Turbo?

Yes, the BMW 2002 Turbo left the factory with the M31, so an M31 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 2002 Turbo?

We do not have an M31 on the shelf for the 2002 Turbo 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 S70B56 fit my McLaren F1?

The S70B56 is the original engine for the McLaren F1, which makes it the straightforward choice. 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 McLaren F1?

We do not have an S70B56 on the shelf for the McLaren F1 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 S70B56 fit my McLaren F1 GTR?

Yes, the McLaren F1 GTR left the factory with the S70B56, so an S70B56 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 McLaren F1 GTR?

We do not have an S70B56 on the shelf for the McLaren F1 GTR 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.

M31, M337 and S70 model-year guide

Use this year-by-year guide to see which M31, M337 and S70 versions were in production when your car was built.

1952 — M337 was in production. New this year: M337.

1953 — M337 was in production.

1954 — M337 was in production.

1955 — M337 was in production.

1956 — M337 was in production.

1957 — M337 was in production.

1958 — M337 was in production. Last year for M337.

1973 — M31 was in production. New this year: M31.

1974 — M31 was in production.

1975 — M31 was in production. Last year for M31.

1993 — S70B56 was in production. New this year: S70B56.

1994 — S70B56 was in production.

1995 — S70B56 was in production.

1996 — S70B56 was in production.

1997 — S70B56 was in production.

1998 — S70B56 was in production. Last year for S70B56.

Common M31, M337 and S70 problems and what to check

No engine is perfect. These are the faults our workshop sees most often on the M31, M337 and S70, what causes them and how to check a used unit before you buy.

Age and storage

All of these engines are old or extremely rare. Corrosion, seized parts and missing components are the main risks.

How to check: Ask for photographs of the internals and the history.

Originality

Matching numbers and correct ancillaries add value.

How to check: Check the engine number against the car's documents.

Diagnosing a failing M31, M337 and S70: 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 M31, M337 and S70 is the better route.

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.

Repair or replace your M31, M337 and S70?

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 M31, M337 and S70 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.

M31, M337 and S70 maintenance and running costs

Keep documentation with the engine.

The single best thing you can do for an M31, M337 and S70 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 M31, M337 and S70: the full checklist

Work through these points before you order a used M31, M337 and S70, whoever you buy from.

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.

M31, M337 and S70 prices: what you should pay

We do not have an M31, M337 and S70 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.

M31, M337 and S70 engines in stock now

Fitting a replacement M31, M337 and S70

These are the steps we recommend to every workshop fitting one of our M31, M337 and S70 engines.

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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

Collectors keep them standard.

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.

M31, M337 and S70 compared with similar BMW engines

Buyers often compare the M31, M337 and S70 with these engines. Here is how they line up.

The M60 is milder (up to 286 hp against 627 hp) and uses duplex timing chains at the front, one per bank, with hydraulic tensioners. Its best-known faults are nikasil bore damage and timing chain guides and tensioners. Read the M60 guide.

The M30 is milder (up to 218 hp against 627 hp) and uses duplex timing chain at the front with a hydraulic tensioner; no service interval. Its best-known faults are head gasket and cracked heads and cooling system age. Read the M30 guide.

The N54 is milder (up to 306 hp against 627 hp) and uses timing chain at the front. Its best-known faults are high-pressure fuel pump and wastegate rattle. Read the N54 guide.

Delivery, warranty and payment

Every M31, M337 and S70 engine 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.

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 M31, M337 and S70 engines from Hamburg to customers across Europe and beyond. Typical door-to-door times and customs status:

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 M31, M337 and S70

What is the BMW S70B56 engine?

The BMW S70B56 is a 5.6 liter (5,576 cc) petrol engine from the S70 family. It has a V12, SOHC, 24 valve layout with no turbo (naturally aspirated), and makes 280 kW (381 HP) with 550 Nm of torque. BMW built it from 1992 to 1996 and it meets the Euro 1 emission standard.

You find the S70B56 in the BMW E31 850CSi. What we list: BMW S70 5.6 V12 engines from the E31 850CSi.

At Autowerke Engines every S70B56 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 S70 Engines · Search S70B56 in the shop

How much does a used BMW S70B56 engine cost?

A used BMW S70B56 engine in our yard usually costs between 11.550 € and 17.450 €. 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 S70 Engines · Search S70B56 in the shop

Which cars use the BMW S70B56 engine?

BMW fitted the S70B56 to the BMW E31 850CSi. These cars were built with this engine from about 1992 to 1996.

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 S70B56 is the only S70 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 S70 Engines · Search S70B56 in the shop

How much power and torque does the BMW S70B56 have?

From the factory the BMW S70B56 makes 280 kW (381 HP) and 550 Nm of torque. It is a 5.6 liter (5,576 cc) V12, SOHC, 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 S70B56 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 S70 Engines · Search S70B56 in the shop

How do I know a used S70B56 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 S70B56, 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 S70 Engines · Search S70B56 in the shop

What comes with a used S70B56 engine?

Each S70B56 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 S70 Engines · Search S70B56 in the shop

Is the BMW S70B56 a diesel or petrol engine?

The S70B56 is a petrol engine. It is a 5.6 liter (5,576 cc) V12, SOHC, 24 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 S70 Engines · Search S70B56 in the shop

Are there other versions of the BMW S70B56?

In our yard the S70B56 is the only listed version of the S70 family. It makes 280 kW (381 HP) and 550 Nm, and was built from 1992 to 1996.

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 S70 Engines · Search S70B56 in the shop

How long does delivery of an S70B56 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 S70 Engines · Search S70B56 in the shop

What should I replace when I fit a used S70B56 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 S70 Engines · Search S70B56 in the shop

Does a used S70B56 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 S70 Engines · Search S70B56 in the shop

Can you check if an S70B56 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 S70B56, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW E31 850CSi.

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 S70 Engines · Search S70B56 in the shop

What should I know about the BMW S70 engine?

BMW S70 5.6 V12 engines from the E31 850CSi. We list one version: S70B56 (5.6 liter (5,576 cc), 280 kW (381 HP), 1992 to 1996).

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 S70 family was used in chassis E31. 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.

See all S70 Engines

What should I check on a used BMW S70 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 S70 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 S70 Engines · Inspection certificate

Which years were BMW S70 engines made?

BMW built the S70 engines we list from about 1992 to 1996. The S70B56 ran from 1992 to 1996.

They went into chassis E31. 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.

See all S70 Engines

Will the S70B56 engine fit my BMW E31 850CSi?

Yes, if your BMW E31 850CSi was built with the S70B56. BMW used this 5.6 liter (5,576 cc) petrol engine with 280 kW (381 HP) in the E31 850CSi from about 1992 to 1996.

In our records the S70B56 is the engine for the E31 850CSi, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your E31 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 S70 Engines · Search S70B56 in the shop

How much is a replacement S70B56 engine for a BMW E31 850CSi?

A used S70B56 for the BMW E31 850CSi costs from about 11.550 € to 17.450 € 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 S70B56 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 S70 Engines · Search S70B56 in the shop

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.

How long does engine delivery to Italy take?

Delivery from our Hamburg yard to Italy 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.

Italy 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.

How long does engine delivery to Luxembourg take?

Delivery from our Hamburg yard to Luxembourg takes 1 to 3 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.

Luxembourg 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.

Do your prices include VAT?

Yes. Prices include VAT at the correct rate for private buyers.

A VAT invoice is issued with every order and emailed on dispatch.

Business buyers can ask about VAT treatment for their country.

Shipping is 249 € per order and is shown on the same invoice.

How do I pay with USDT or Bitcoin?

After you place the order, we email a wallet address and the amount in euro.

For USDT, the email also names the network. Send only on that network, or the payment may be lost.

The unit stays reserved until the transfer is confirmed on the network, then it is dispatched.

If anything is unclear, ask the desk before you send.

How long does engine delivery to Czechia take?

Delivery from our Hamburg yard to Czechia 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.

Czechia 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.

How long does engine delivery to Spain take?

Delivery from our Hamburg yard to Spain 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.

Spain 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.

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.

How long does engine delivery to Germany take?

Delivery from our Hamburg yard to Germany takes 1 to 3 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.

Germany 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.

How long does engine delivery to Sweden take?

Delivery from our Hamburg yard to Sweden 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.

Sweden 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.

How long does engine delivery to Cyprus take?

Delivery from our Hamburg yard to Cyprus 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.

Cyprus 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.

How long does engine delivery to Portugal take?

Delivery from our Hamburg yard to Portugal 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.

Portugal 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.

How long does engine delivery to the Netherlands take?

Delivery from our Hamburg yard to the Netherlands takes 1 to 3 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 Netherlands 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 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.

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 does paying by bank transfer work?

SEPA bank transfer is available on request. After your order we send the bank details and the amount.

We hold the unit for five working days while the transfer clears, then dispatch it.

Please use your order number as the payment reference so we can match it quickly.

A VAT invoice is emailed when the engine is dispatched.

What does the free VIN check do?

The VIN check on our site reads the year, the make, the model and the engine from the public vehicle register.

After that, our desk confirms the gearbox and the parts your car needs, so the engine you reserve is the right one.

The check is free and there is no obligation to buy.

Your VIN is 17 characters long. You find it on the registration papers, at the bottom of the windscreen or on the door pillar.

How long does engine delivery to France take?

Delivery from our Hamburg yard to France takes 1 to 3 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.

France 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.

How fast does my order leave the yard?

Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day.

You get a tracking number as soon as the carrier collects the pallet.

Delivery inside Western Europe usually takes 1 to 5 working days.

If you need the engine by a certain date, tell us when you order. We plan the dispatch around it.

How long does engine delivery to Austria take?

Delivery from our Hamburg yard to Austria 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.

Austria 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.

What does the warranty not cover?

The warranty does not cover damage from wrong fitting or wrong use.

It also does not cover overheating, low oil, poor servicing, wrong fluids, fuel or parts, or engines that were modified, opened or repaired without our approval.

Labour costs, towing, vehicle recovery and other losses are not covered.

Following the fitting advice and keeping your receipts is the best way to stay covered.

How long is the engine warranty?

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 engine must be fitted by a qualified mechanic or workshop, with the correct oil, coolant, filters and service parts.

Report any problem to us right away, and do not open or repair the engine without our written approval.

If a claim is approved, we repair, replace or refund the engine.

How long does engine delivery to Ireland take?

Delivery from our Hamburg yard to Ireland 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.

Ireland 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.

How long does engine delivery to Malta take?

Delivery from our Hamburg yard to Malta 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.

Malta 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.

How do I contact Autowerke Engines?

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 contact form on our site. We reply during working hours.

For a fast answer about fitment, include your VIN and the engine code in your first message.

Our yard and office are at Andreas Meyer Straße 38, 22113 Hamburg, Germany.

How much does shipping cost?

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.

The fee covers packing on a heat-treated pallet, shrink-wrapping and delivery by a freight carrier.

Inside the EU there is no import duty. For non-EU countries, the receiver pays import duty and local VAT.

The UK and other non-EU destinations get an individual quote for the delivery time.

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 if my engine arrives damaged?

Check the pallet before you sign. If the wrapping is damaged, note it on the paperwork and take photos.

Contact us within 48 hours of delivery with your order number and clear photos of the product and the packing.

If you got the wrong item or it arrived damaged, we pay the return shipping and put it right.

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 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.

How long does engine delivery to Finland take?

Delivery from our Hamburg yard to Finland 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.

Finland 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.

Who pays for return shipping?

If you change your mind, you pay the return shipping.

If we sent the wrong item or it arrived damaged, we cover the return.

Always contact us first. We arrange the pallet and the paperwork so the engine travels safely.

Returns are accepted within 14 days of delivery for unused items.

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.

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.

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.

Which payment methods do you accept?

You can pay by Visa, Mastercard or American Express through a secure link we email after you order. You can also pay by SEPA bank transfer, USDT or Bitcoin.

iDEAL, Bancontact and other local methods are offered based on your delivery country.

Approved workshops and fleet operators can order on 30-day terms.

Every payment runs over an encrypted connection, and we never see or store your card details.

Can I visit the yard in Hamburg?

Yes. Our yard is at Andreas Meyer Straße 38, 22113 Hamburg, Germany.

Please book a visit with the desk first, so the unit you want to see is ready and someone can show you around.

Opening hours for the desk are Monday to Friday, 9:00 to 16:00 CET.

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.

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.
• TU — Technical Update, BMW's suffix for a revised version of an engine.

Our verdict

The M31, M337 and S70 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 M31, M337 and S70 will give years of service.

Ready to order, or need help choosing? Browse every M31, M337 and S70 in stock, contact the Hamburg desk or send us your VIN on WhatsApp.

Guides to each M31, M337 and S70 version

• BMW S70B56 engine: specs, problems and prices