BMW N74B66 engine: specs, problems and prices

The N74B66 is a 6.6 L petrol V12 from BMW's N74 family, built 2016–2022 and rated at 610 hp and 850 Nm. It powered the BMW G12 M760Li and Rolls-Royce Dawn.

This guide is about the N74B66 specifically: its specification, the cars that use it, how it differs from the other N74 versions, what to check, prices from our stock and fitment answers for each model. For the history of the whole family, read our N73 and N74 guide.

• Capacity and layout: 6.6 L, V12, twin-turbo
• Output: 610 hp and 850 Nm
• Production: 2016–2022
• Fitted to: 2 models across 1 chassis generation
• In our stock: 43 units from 8.291,00 € — N74B66 engines for sale

N74B66 specifications

N74B66: 6.6 L, V12, petrol, twin-turbo. Output is 610 hp with 850 Nm of torque, and production ran from 2016 to 2022. That is about 92 hp and 129 Nm per litre, a strong figure for a road engine of its era. Within the N74 family, it is the most powerful version, while the N74B68 (571 hp) is milder. It was fitted to the BMW G12 M760Li and Rolls-Royce Dawn.

What the code N74B66 means

• N marks an N-series code, the generation of BMW engines introduced from 2001.
• 74 is the family number.
• B stands for petrol (from the German Benzin).
• 66 is the capacity in decilitres, so 6.6 litres.

Which BMW models use the N74B66

In the G12 sixth 7 Series long-wheelbase (2015–2022), the N74B66 powered the M760Li. We have 22 N74B66 units from G12 donor cars. All G12 engines

N74B66 compared with other N74 versions

N74B66 or N74B60?

The N74B60 has the same 610 hp as the N74B66, from the same 6.6 L, and was built 2009–2022. Versions of the same size share the block and most mounting points, but the turbo or intake, injectors, software and sometimes the sump differ. Fitting one in place of the other usually means transferring parts and coding the engine control unit, so the simplest choice is the code your car left the factory with.

N74B66 or N74B68?

The N74B68 has 39 hp less than the N74B66 (571 against 610 hp), from 6.75 L instead of 6.6 L, and was built 2009–2020. 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 N74B66 problems

The N74B66 shares its weak points with the rest of the N74 family. These are the faults to check on a used unit and on your own engine. The full explanation of each is in the N73 and N74 guide.

Ignition coils and spark plugs. Coils fail and cause misfires.

N74B66 maintenance

• 5W-30 BMW Longlife-01.
• Oil every 10,000 km.
• Timing chains, one per bank.

Will the N74B66 fit my car?

N74B66 prices

Across 43 N74B66 units in our stock today, prices start at 8.291,00 € and reach 12.215,00 €. The median — the price in the middle of the range — is 9.938,00 €.

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.

N74B66 prices by model year

Engines from 2015–2019 have a median of 9.875,00 €, while units from 2020–2024 sit at 10.172,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

N74B66 prices by mileage

Mileage matters less than history on a well-maintained BMW engine, but it is a useful guide. A low-mileage unit from a younger car gives you more life for a modest premium.

N74B66 engines in stock

Here is a selection of N74B66 engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.

BMW F01 760Li N74B66 Engine 2022, 50,400 km11.311,00 €BMW F01 760Li N74B66 Engine 2022, 117,900 km9.747,00 €BMW G12 M760Li N74B66 Engine 2020, 36,600 km10.170,00 €BMW G12 M760Li N74B66 Engine 2017, 152,800 km9.938,00 €BMW G12 M760Li N74B66 Engine 2021, 58,400 km11.534,00 €BMW F01 760Li N74B66 Engine 2017, 18,300 km8.893,00 €BMW F01 760Li N74B66 Engine 2021, 136,800 km9.868,00 €BMW F01 760Li N74B66 Engine 2019, 106,700 km9.875,00 €BMW G12 M760Li N74B66 Engine 2019, 182,200 km10.592,00 €BMW F01 760Li N74B66 Engine 2016, 80,600 km8.904,00 €BMW G12 M760Li N74B66 Engine 2020, 110,800 km9.047,00 €BMW G12 M760Li N74B66 Engine 2020, 119,800 km8.291,00 €

BMW F01 760Li N74B66 Engine 2022, 50,400 km — 11.311,00 €, reduced from 12.100,00 €. It comes from a 2022 donor car with 50,400 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.

BMW F01 760Li N74B66 Engine 2022, 117,900 km — 9.747,00 €, reduced from 10.500,00 €. It comes from a 2022 donor car with 117,900 km, and 17 units are available. The listing shows every side of the engine and the fitted parts.

BMW G12 M760Li N74B66 Engine 2020, 36,600 km — 10.170,00 €, reduced from 11.250,00 €. It comes from a 2020 donor car with 36,600 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.

BMW G12 M760Li N74B66 Engine 2017, 152,800 km — 9.938,00 €, reduced from 10.650,00 €. It comes from a 2017 donor car with 152,800 km, and 24 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW G12 M760Li N74B66 Engine 2021, 58,400 km — 11.534,00 €, reduced from 12.550,00 €. It comes from a 2021 donor car with 58,400 km, and 25 units are available. We can confirm fitment against your VIN the same day.

BMW F01 760Li N74B66 Engine 2017, 18,300 km — 8.893,00 €, reduced from 10.100,00 €. It comes from a 2017 donor car with 18,300 km, and 22 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F01 760Li N74B66 Engine 2021, 136,800 km — 9.868,00 €, reduced from 11.050,00 €. It comes from a 2021 donor car with 136,800 km, and 11 units are available. We can confirm fitment against your VIN the same day.

BMW F01 760Li N74B66 Engine 2019, 106,700 km — 9.875,00 €, reduced from 10.700,00 €. It comes from a 2019 donor car with 106,700 km, and 12 units are available. We can confirm fitment against your VIN the same day.

BMW G12 M760Li N74B66 Engine 2019, 182,200 km — 10.592,00 €, reduced from 11.450,00 €. It comes from a 2019 donor car with 182,200 km, and 14 units are available. We can confirm fitment against your VIN the same day.

BMW F01 760Li N74B66 Engine 2016, 80,600 km — 8.904,00 €, reduced from 9.550,00 €. It comes from a 2016 donor car with 80,600 km, and 7 units are available. The listing shows every side of the engine and the fitted parts.

BMW G12 M760Li N74B66 Engine 2020, 110,800 km — 9.047,00 €, reduced from 9.800,00 €. It comes from a 2020 donor car with 110,800 km, and 9 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW G12 M760Li N74B66 Engine 2020, 119,800 km — 8.291,00 €, reduced from 8.850,00 €. It comes from a 2020 donor car with 119,800 km, and 17 units are available. The listing shows every side of the engine and the fitted parts.

Buying a used N74B66: checklist

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. Injectors and high-pressure fuel pump. Direct-injection engines rely on high-pressure pumps and precise injectors. Ask whether the injectors are original or updated and whether there were fuel pressure faults.
8. Both cylinder banks and both ECUs. V12 engines often use separate management for each bank. Read faults from both and compare compression across all twelve cylinders.

Questions about the N74B66

Will the N74B66 engine fit my BMW F02 760Li?

Yes, if your BMW F02 760Li was built with the N74B66. BMW used this 6.6 liter (6,592 cc) petrol engine with 448 kW (610 HP) in the F02 760Li from about 2009 to 2022.

In our records the N74B66 is the engine for the F02 760Li, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F02 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 N74 Engines · Search N74B66 in the shop

Will the N74B66 engine fit my BMW F01 760Li?

Yes, if your BMW F01 760Li was built with the N74B66. BMW used this 6.6 liter (6,592 cc) petrol engine with 448 kW (610 HP) in the F01 760Li from about 2009 to 2022.

In our records the N74B66 is the engine for the F01 760Li, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F01 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 N74 Engines · Search N74B66 in the shop

How much power and torque does the BMW N74B66 have?

From the factory the BMW N74B66 makes 448 kW (610 HP) and 800 Nm of torque. It is a 6.6 liter (6,592 cc) V12, DOHC, 48 valve petrol engine with twin turbochargers.

Because it is turbocharged, the torque comes in low in the rev range, which makes the car feel strong in everyday driving. A healthy turbo, a clean intercooler and tight boost pipes 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 N74B66 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 N74 Engines · Search N74B66 in the shop

Are there other versions of the BMW N74B66?

In our yard the N74B66 is the only listed version of the N74 family. It makes 448 kW (610 HP) and 800 Nm, and was built from 2009 to 2022.

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 N74 Engines · Search N74B66 in the shop

How much is a replacement N74B66 engine for a BMW F01 760Li?

A used N74B66 for the BMW F01 760Li costs from about 8.050 € to 12.200 € 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 N74B66 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 N74 Engines · Search N74B66 in the shop

How much is a replacement N74B66 engine for a BMW G12 M760Li?

A used N74B66 for the BMW G12 M760Li costs from about 8.050 € to 12.200 € 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 N74B66 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 N74 Engines · Search N74B66 in the shop

Which cars use the BMW N74B66 engine?

BMW fitted the N74B66 to the BMW G12 M760Li, BMW F01 760Li and BMW F02 760Li. These cars were built with this engine from about 2009 to 2022.

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 N74B66 is the only N74 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 N74 Engines · Search N74B66 in the shop

How much does a used BMW N74B66 engine cost?

A used BMW N74B66 engine in our yard usually costs between 8.050 € and 12.200 €. 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 N74 Engines · Search N74B66 in the shop

What is the BMW N74B66 engine?

The BMW N74B66 is a 6.6 liter (6,592 cc) petrol engine from the N74 family. It has a V12, DOHC, 48 valve layout with twin turbochargers, and makes 448 kW (610 HP) with 800 Nm of torque. BMW built it from 2009 to 2022 and it meets the Euro 6 emission standard.

You find the N74B66 in the BMW G12 M760Li, BMW F01 760Li and BMW F02 760Li. What we list: BMW N74 6.6 twin-turbo V12 engines for the 760Li and M760Li.

At Autowerke Engines every N74B66 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 N74 Engines · Search N74B66 in the shop

How long does delivery of an N74B66 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.

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What comes with a used N74B66 engine?

Each N74B66 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 N74 Engines · Search N74B66 in the shop

Is the BMW N74B66 a diesel or petrol engine?

The N74B66 is a petrol engine. It is a 6.6 liter (6,592 cc) V12, DOHC, 48 valve unit with twin turbochargers, and it was built to the Euro 6 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 N74 Engines · Search N74B66 in the shop

Will the N74B66 engine fit my BMW G12 M760Li?

Yes, if your BMW G12 M760Li was built with the N74B66. BMW used this 6.6 liter (6,592 cc) petrol engine with 448 kW (610 HP) in the G12 M760Li from about 2009 to 2022.

In our records the N74B66 is the engine for the G12 M760Li, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your G12 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 N74 Engines · Search N74B66 in the shop

What should I replace when I fit a used N74B66 engine?

A used engine lasts longest when it starts life in your car with fresh fluids and new seals. Clean the intercooler and the intake pipes, and fill the turbo oil feed with clean oil before the first start, so the turbo never runs dry. 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.

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How do I know a used N74B66 engine is in good shape?

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. 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. If you want more photos or a short video of a unit, ask the desk and we send them before you pay.

On a petrol engine like the N74B66, 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 N74 Engines · Search N74B66 in the shop

Does a used N74B66 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 N74 Engines · Search N74B66 in the shop

How much is a replacement N74B66 engine for a BMW F02 760Li?

A used N74B66 for the BMW F02 760Li costs from about 8.050 € to 12.200 € 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 N74B66 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 N74 Engines · Search N74B66 in the shop

Can you check if an N74B66 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 N74B66, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW G12 M760Li, BMW F01 760Li and BMW F02 760Li.

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 N74 Engines · Search N74B66 in the shop

Delivery, warranty and payment

Before an N74B66 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.

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.

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