BMW N55B30O0 engine: specs, problems and prices

The N55B30O0 is a 3.0 L petrol inline-6 from BMW's N55 family, built 2013–2016 and rated at 326 hp and 450 Nm. It powered the BMW F22 M235i and BMW F30 335i.

This guide is about the N55B30O0 specifically: its specification, the cars that use it, how it differs from the other N55 versions, what to check, prices from our stock and fitment answers for each model. For the history of the whole family, read our N55 guide.

• Capacity and layout: 3.0 L, inline-6, turbocharged
• Output: 326 hp and 450 Nm
• Production: 2013–2016
• Fitted to: 2 models across 2 chassis generations
• In our stock: 3 units from 2.404,00 €

N55B30O0 specifications

N55B30O0: 3.0 L, inline-6, petrol, turbocharged. Output is 326 hp with 450 Nm of torque, and production ran from 2013 to 2016. That is about 109 hp and 150 Nm per litre, a strong figure for a road engine of its era. Within the N55 family, it is the most powerful version, while the N55B30 (306 hp) and N55B30T0 (306 hp) are milder. It was fitted to the BMW F22 M235i and BMW F30 335i.

What the code N55B30O0 means

• N marks an N-series code, the generation of BMW engines introduced from 2001.
• 55 is the family number.
• B stands for petrol (from the German Benzin).
• 30 is the capacity in decilitres, so 3.0 litres.
• O0 identifies the version or output stage.

Which BMW models use the N55B30O0

In the F22 first 2 Series coupé (2014–2021), the N55B30O0 powered the M235i. We have 1 N55B30O0 unit from F22 donor cars. All F22 engines

In the F30 sixth 3 Series (2011–2019), the N55B30O0 powered the 335i. We have 1 N55B30O0 unit from F30 donor cars. All F30 engines

N55B30O0 compared with other N55 versions

N55B30O0 or N55B30?

The N55B30 has 20 hp less than the N55B30O0 (306 against 326 hp), from the same 3.0 L, and was built 2009–2017. 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.

N55B30O0 or N55B30T0?

The N55B30T0 has 20 hp less than the N55B30O0 (306 against 326 hp), from the same 3.0 L, and was built 2009–2016. 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.

Common N55B30O0 problems

The N55B30O0 shares its weak points with the rest of the N55 family. These are the faults to check on a used unit and on your own engine. The full explanation of each is in the N55 guide.

Charge pipe. The plastic charge pipe cracks under boost.

N55B30O0 maintenance

• 5W-30 or 0W-30 BMW Longlife-01, about 6.5 litres.
• Oil every 10,000 to 15,000 km.
• Timing chain at the front.

Will the N55B30O0 fit my car?

Will the N55B30O0 fit my BMW F22 M235i?

For the BMW F22 M235i, the N55B30O0 is the factory engine and the one to order. The first 2 Series coupé was built 2014–2021, and the N55B30O0 was produced 2013–2016, 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 F22 M235i?

We have 1 N55B30O0 engine from F22 donor cars, priced from 2.524,00 €. 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 N55B30O0 fit my BMW F30 335i?

The N55B30O0 is the original engine for the BMW F30 335i, which makes it the straightforward choice. The sixth 3 Series was built 2011–2019, and the N55B30O0 was produced 2013–2016, 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 F30 335i?

We have 1 N55B30O0 engine from F30 donor cars, priced from 2.533,00 €. 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.

N55B30O0 prices

We currently hold 3 N55B30O0 engines. The cheapest is 2.404,00 €, the most expensive 2.533,00 €, and half of them cost less than 2.524,00 €.

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.

N55B30O0 engines in stock

Here is a selection of N55B30O0 engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.

BMW F30 335i N55B30O0 Complete Engine2.533,00 €BMW F22 M235i N55B30O0 Complete Engine2.524,00 €BMW N55B30O0 Engine2.404,00 €

BMW F30 335i N55B30O0 Complete Engine — 2.533,00 €, reduced from 3.000,00 €. It comes from a recorded donor car, and 15 units are available. We can confirm fitment against your VIN the same day.

BMW F22 M235i N55B30O0 Complete Engine — 2.524,00 €, reduced from 3.000,00 €. It comes from a recorded donor car, and 23 units are available. We can confirm fitment against your VIN the same day.

BMW N55B30O0 Engine — 2.404,00 €, reduced from 3.000,00 €. It comes from a recorded donor car, and 15 units are available. Ask the desk for compression figures or extra photographs before you order.

Buying a used N55B30O0: checklist

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. 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.
3. 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.
4. 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.
5. 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.
6. Turbocharger shaft play and oil. Rotate the compressor wheel by hand. A small amount of side play is normal; in-and-out play or wheel contact with the housing is not. Oil pooled in the intake or intercooler pipes points to worn seals.
7. 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.
8. 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.
9. Double VANOS units and solenoids. Ask for the adaptation values or fault history if the engine was running. Solenoids are inexpensive and are often replaced as a matter of course on a used engine.
10. Valvetronic motor and eccentric shaft sensor. The Valvetronic motor and its sensor cause limp-mode faults when they fail. Inspect the connector and the seal around the motor for oil.
11. 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.
12. Electric water pump. This engine uses an electric water pump. It fails without warning and needs a diagnostic bleeding routine when it is replaced or the system is refilled.

Questions about the N55B30O0

Will the N55B30 engine fit my BMW F32 435i?

Yes, if your BMW F32 435i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F32 435i from about 2010 to 2017.

In our records the N55B30 is the engine for the F32 435i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F32 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 N55 Engines · Search N55B30 in the shop

Will the N55B30 engine fit my BMW F31 335i?

Yes, if your BMW F31 335i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F31 335i from about 2010 to 2017.

In our records the N55B30 is the engine for the F31 335i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F31 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 N55 Engines · Search N55B30 in the shop

Which cars use the BMW N55B30 engine?

BMW fitted the N55B30 to the BMW F30 335i, BMW F31 335i, BMW E92 335i, BMW F32 435i, BMW F20 M135i, BMW F15 X5 xDrive35i and BMW F25 X3 xDrive35i. These cars were built with this engine from about 2010 to 2017.

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 N55B30 is the only N55 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 N55 Engines · Search N55B30 in the shop

How much does a used BMW N55B30 engine cost?

A used BMW N55B30 engine in our yard usually costs between 3.100 € and 4.850 €. 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 N55 Engines · Search N55B30 in the shop

Does a used N55B30 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 N55 Engines · Search N55B30 in the shop

What is in the N55 BMW complete conversion kit?

The N55 BMW complete conversion kit includes: BMW E36 engine mounts for a N55B30; Bellhousing adapter, clutch and flywheel; Custom engine loom and sensor patch; Cooling hoses, intercooler pipes and downpipe; Power-steering and fuel-line kit; Step-by-step fitting guide.

It is made for the BMW E36, BMW E46 and BMW E39 (1990–2005), and replaces the M52, M54 and M50. Gearbox set-ups we support are the ZF GS6 and Getrag 420G.

This kit costs about 2.620 € to 3.630 €, depending on the exact listing. The engine is not included, so you can use your own N55B30 or buy one from our yard.

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 are not sure which kit you need, tell us your vehicle, its year and its current engine and gearbox. We help for free.

See all N55 BMW Conversion Kits · Conversion guide

What comes with a used N55B30 engine?

Each N55B30 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 N55 Engines · Search N55B30 in the shop

Are there other versions of the BMW N55B30?

In our yard the N55B30 is the only listed version of the N55 family. It makes 225 kW (306 HP) and 400 Nm, and was built from 2010 to 2017.

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 N55 Engines · Search N55B30 in the shop

How much is a replacement N55B30 engine for a BMW F30 335i?

A used N55B30 for the BMW F30 335i costs from about 3.100 € to 4.850 € 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 N55B30 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 N55 Engines · Search N55B30 in the shop

What is the BMW N55B30 engine?

The BMW N55B30 is a 3.0 liter (2,979 cc) petrol engine from the N55 family. It has an inline 6, DOHC, 24 valve layout with a twin-scroll turbocharger, and makes 225 kW (306 HP) with 400 Nm of torque. BMW built it from 2010 to 2017 and it meets the Euro 5 emission standard.

You find the N55B30 in the BMW F30 335i, BMW F31 335i, BMW E92 335i, BMW F32 435i, BMW F20 M135i, BMW F15 X5 xDrive35i and BMW F25 X3 xDrive35i. What we list: BMW N55 3.0 single-turbo petrol engines for F30 335i, M135i and X5 35i.

At Autowerke Engines every N55B30 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 N55 Engines · Search N55B30 in the shop

How hard is an N55 BMW swap?

A N55B30 swap into the BMW E36, BMW E46 and BMW E39 is a big job, but a good workshop can do it with a complete kit. Most of the time goes into the mounts, the adapter and the wiring.

The usual steps are: remove the old engine, fit the new mounts and the adapter plate, set the engine in, connect the wiring and the engine computer, then fit the cooling and the exhaust. A test drive and a final check follow.

Our kits come with parts that are made to work together, which saves time and guesswork. What we list: N55 turbo petrol conversions for older BMW chassis.

Before you start, check your local rules for registration and road tests after an engine change. We supply invoices and documents that help with this.

See all N55 BMW Conversion Kits · Conversion guide

What should I check on a used BMW N55 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 N55 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 N55 Engines · Inspection certificate

Delivery, warranty and payment

Every N55B30O0 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.

N55 engine guide · All N55 engines · Send us your VIN