BMW N55 engine: the complete buyer's guide

The N55 is BMW's single twin-scroll turbo straight-six from 2009 to 2019. It powered the F10 535i, the F30 335i, the F32 435i, the F20 M135i, the F22 M235i, the M2, the E70 and F15 X5 35i, the F25 X3 35i and many more.

It is more reliable than the N54 and still tunes well. Most faults are leaks and bolt-on parts, so a used N55 is one of the safer high-power replacement engines.

• Production: 2009–2017
• Versions covered: N55B30, N55B30T0 and N55B30O0
• Output range: 306–326 hp
• Fuel and layout: petrol inline-6
• Fitted to: 7 BMW models across 7 chassis generations
• In our stock now: 421 units from 1.887,00 € — browse all N55 engines

The N55 at a glance

The table lists every N55 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 306 to 326 hp. The spread reflects different capacities, tuning for different markets and the technical updates BMW made over 9 years of production.

History of the N55

BMW introduced the N55 with a single twin-scroll turbo, Valvetronic and solenoid direct injectors. It replaced the N54 and later the N52 in many models. The B58 took over from 2015.

2009: the N55B30 arrived with 3.0 L and 306 hp in the BMW F30 335i, BMW F10 535i and BMW F20 M135i.

2009: the N55B30T0 arrived with 3.0 L and 306 hp in the BMW F30 335i, BMW F10 535i and BMW F32 435i. It matched the N55B30 for power.

2013: the N55B30O0 arrived with 3.0 L and 326 hp in the BMW F22 M235i and BMW F30 335i. Compared with the N55B30T0, it added 20 hp.

Every N55 version explained

N55B30 (3.0 L, 306 hp)

Built from 2009 to 2017, the N55B30 displaces 3.0 L in an inline-6 layout and is turbocharged. It produces 306 hp and 400 Nm on petrol. That is about 102 hp and 133 Nm per litre, a strong figure for a road engine of its era. Within the N55 family, the N55B30O0 (326 hp) is more powerful. It was fitted to the BMW F30 335i, BMW F10 535i, BMW F20 M135i, BMW F22 M235i, BMW E70 X5 35i and BMW F25 X3 35i. See every N55B30 in stock.

Reading the code: 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.

We have 418 N55B30 units in stock, priced from 1.887,00 € to 5.850,00 €.

N55B30T0 (3.0 L, 306 hp)

The N55B30T0 is a 3.0 L inline-6 petrol engine, turbocharged, rated at 306 hp and 400 Nm. BMW built it from 2009 to 2016. That is about 102 hp and 133 Nm per litre, a strong figure for a road engine of its era. Within the N55 family, the N55B30O0 (326 hp) is more powerful. It was fitted to the BMW F30 335i, BMW F10 535i and BMW F32 435i.

Reading the code: 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; T0 identifies the version or output stage.

We have 4 N55B30T0 units in stock, priced from 2.218,00 € to 2.328,00 €.

N55B30O0 (3.0 L, 326 hp)

Built from 2013 to 2016, the N55B30O0 displaces 3.0 L in an inline-6 layout and is turbocharged. It produces 326 hp and 450 Nm on petrol. 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.

Reading the code: 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.

We have 3 N55B30O0 units in stock, priced from 2.404,00 € to 2.533,00 €.

Which cars use the N55

The N55 was fitted to 7 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.

BMW F30 sixth 3 Series (2011–2019)

In the sixth 3 Series, built 2011–2019 as a saloon, the N55 powered the 335i (N55B30, 306 hp), 335i (N55B30T0, 306 hp) and 335i (N55B30O0, 326 hp).

For an F30, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update. We currently have 82 N55 units from F30 donor cars. All F30 engines in stock.

The 335i uses the N55B30. BMW 335i engines for sale.

The 335i uses the N55B30T0. BMW 335i engines for sale.

The 335i uses the N55B30O0. BMW 335i engines for sale.

BMW F10 sixth 5 Series (2010–2017)

In the sixth 5 Series, built 2010–2017 as a saloon, the N55 powered the 535i (N55B30, 306 hp) and 535i (N55B30T0, 306 hp).

The quickest way to confirm the right N55 for your F10 is to send us the VIN; we check the engine code, the gearbox and the drive type. We currently have 4 N55 units from F10 donor cars. All F10 engines in stock.

The 535i uses the N55B30. BMW 535i engines for sale.

The 535i uses the N55B30T0. BMW 535i engines for sale.

BMW F20 second 1 Series five-door (2011–2019)

In the second 1 Series five-door, built 2011–2019 as a hatchback, the N55 powered the M135i (N55B30, 306 hp).

The quickest way to confirm the right N55 for your F20 is to send us the VIN; we check the engine code, the gearbox and the drive type. We currently have 78 N55 units from F20 donor cars. All F20 engines in stock.

The M135i uses the N55B30. BMW M135i engines for sale.

BMW F22 first 2 Series coupé (2014–2021)

In the first 2 Series coupé, built 2014–2021 as a coupé, the N55 powered the M235i (N55B30, 306 hp) and M235i (N55B30O0, 326 hp).

When ordering for an F22, check whether the car is rear-drive or xDrive and whether it has a manual or automatic gearbox, because the sump and flywheel can differ. We currently have 4 N55 units from F22 donor cars. All F22 engines in stock.

The M235i uses the N55B30. BMW M235i engines for sale.

The M235i uses the N55B30O0. BMW M235i engines for sale.

BMW E70 second X5 (2006–2013)

In the second X5, built 2006–2013 as an SAV, the N55 powered the X5 35i (N55B30, 306 hp).

For an E70, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update. We currently have 2 N55 units from E70 donor cars. All E70 engines in stock.

The X5 35i uses the N55B30. BMW X5 engines for sale.

BMW F25 second X3 (2010–2017)

In the second X3, built 2010–2017 as an SAV, the N55 powered the X3 35i (N55B30, 306 hp).

The quickest way to confirm the right N55 for your F25 is to send us the VIN; we check the engine code, the gearbox and the drive type. We currently have 2 N55 units from F25 donor cars. All F25 engines in stock.

The X3 35i uses the N55B30. BMW X3 engines for sale.

BMW F32 first 4 Series coupé (2013–2020)

In the first 4 Series coupé, built 2013–2020 as a coupé, the N55 powered the 435i (N55B30T0, 306 hp).

For an F32, confirm the production date as well as the model: BMW often changed engine versions at the mid-life update. We currently have 82 N55 units from F32 donor cars. All F32 engines in stock.

The 435i uses the N55B30T0. BMW 435i engines for sale.

Will an N55 fit my BMW? Model-by-model answers

Short answers for every model that left the factory with an N55, with prices from our current stock.

Will the N55B30 fit my BMW F10 535i?

The N55B30 is the original engine for the BMW F10 535i, which makes it the straightforward choice. The sixth 5 Series was built 2010–2017, and the N55B30 was produced 2009–2017, 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 F10 535i?

We have 4 N55B30 engines from F10 donor cars, priced from 2.227,00 € to 5.597,00 €. 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 N55B30 fit my BMW F22 M235i?

Yes, the BMW F22 M235i left the factory with the N55B30, so an N55B30 from another car is the direct replacement. The first 2 Series coupé was built 2014–2021, and the N55B30 was produced 2009–2017, 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 4 N55B30 engines from F22 donor cars, priced from 2.524,00 € to 5.390,00 €. 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 N55B30 fit my BMW E70 X5 35i?

Yes, the BMW E70 X5 35i left the factory with the N55B30, so an N55B30 from another car is the direct replacement. The second X5 was built 2006–2013, and the N55B30 was produced 2009–2017, 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 E70 X5 35i?

We have 2 N55B30 engines from E70 donor cars, priced from 5.212,00 € to 5.381,00 €. 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 N55B30 fit my BMW F25 X3 35i?

For the BMW F25 X3 35i, the N55B30 is the factory engine and the one to order. The second X3 was built 2010–2017, and the N55B30 was produced 2009–2017, 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 F25 X3 35i?

We have 2 N55B30 engines from F25 donor cars, priced from 5.372,00 € to 5.522,00 €. 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 N55B30T0 fit my BMW F30 335i?

Yes, the BMW F30 335i left the factory with the N55B30T0, so an N55B30T0 from another car is the direct replacement. The sixth 3 Series was built 2011–2019, and the N55B30T0 was produced 2009–2016, 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 N55B30T0 engine from F30 donor cars, priced from 2.218,00 €. 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 N55B30T0 fit my BMW F10 535i?

The N55B30T0 is the original engine for the BMW F10 535i, which makes it the straightforward choice. The sixth 5 Series was built 2010–2017, and the N55B30T0 was produced 2009–2016, 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 F10 535i?

We have 1 N55B30T0 engine from F10 donor cars, priced from 2.227,00 €. 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 N55B30T0 fit my BMW F32 435i?

Yes, the BMW F32 435i left the factory with the N55B30T0, so an N55B30T0 from another car is the direct replacement. The first 4 Series coupé was built 2013–2020, and the N55B30T0 was produced 2009–2016, 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 F32 435i?

We have 1 N55B30T0 engine from F32 donor cars, priced from 2.236,00 €. 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 F22 M235i?

Yes, the BMW F22 M235i left the factory with the N55B30O0, so an N55B30O0 from another car is the direct replacement. 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.

N55 model-year guide

Use this year-by-year guide to see which N55 versions were in production when your car was built.

2009 — N55B30 and N55B30T0 were in production. New this year: N55B30 and N55B30T0.

2010 — N55B30 and N55B30T0 were in production.

2011 — N55B30 and N55B30T0 were in production.

2012 — N55B30 and N55B30T0 were in production.

2013 — N55B30, N55B30T0 and N55B30O0 were in production. New this year: N55B30O0.

2014 — N55B30, N55B30T0 and N55B30O0 were in production.

2015 — N55B30, N55B30T0 and N55B30O0 were in production.

2016 — N55B30, N55B30T0 and N55B30O0 were in production. Last year for N55B30T0 and N55B30O0.

2017 — N55B30 was in production. Last year for N55B30.

Common N55 problems and what to check

No engine is perfect. These are the faults our workshop sees most often on the N55, what causes them and how to check a used unit before you buy.

Oil filter housing gasket

Leaks oil down the engine and onto belts.

How to check: Look below the filter housing.

Valve cover gasket

The plastic cover leaks and its built-in PCV can fail.

How to check: Look for oil on the exhaust side.

Electric water pump and thermostat

Fails around 100,000 km.

How to check: Check cooling codes.

Charge pipe

The plastic charge pipe cracks under boost.

How to check: Listen for boost leaks.

Wastegate rattle

The wastegate wears on high-mileage engines.

How to check: Listen when lifting off.

Oil pan gasket

Leaks on higher-mileage engines.

How to check: Check underneath.

Diagnosing a failing N55: 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 N55 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.

Rattle for a few seconds after a cold start. The classic sign of a weak timing chain tensioner or stretched chain. It must be checked quickly: a chain that jumps a tooth can bend valves.

Whistle, loss of boost or limp mode. A split charge pipe, a sticking wastegate or worn turbo bearings. Check the pipes first, then the turbo shaft for play.

Poor low-down torque and uneven idle. VANOS seals or solenoids. The engine may run well at high revs but feel flat and lumpy at low speed.

Limp mode with a Valvetronic fault. The Valvetronic motor, its eccentric shaft sensor or the wiring. The engine runs on a reduced throttle until it is repaired.

Long cranking before the engine starts. On direct-injection engines, a weak high-pressure fuel pump or leaking injector lets pressure drop when the engine is off.

Repair or replace your N55?

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 N55 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.

N55 maintenance and running costs

Replace the oil filter housing gasket and valve cover gasket before installing a used N55.

The single best thing you can do for an N55 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.

Let a turbocharged engine idle for thirty seconds after hard driving so the turbo can cool, and warm it up gently before using full boost.

Cooling parts are consumables on this engine. Plan to replace the water pump, thermostat and expansion tank every 100,000 km or so, before they fail.

Buying a used N55: the full checklist

Work through these points before you order a used N55, 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. 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.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.

N55 prices: what you should pay

We currently hold 421 N55 engines. The cheapest is 1.887,00 €, the most expensive 5.850,00 €, and half of them cost less than 4.025,00 €.

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.

N55 prices by model year

Engines from 2005–2009 have a median of 5.212,00 €, while units from 2015–2019 sit at 4.035,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

N55 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.

N55 engines in stock now

These N55 units are in our Hamburg yard right now. Each listing shows real photographs of the engine you receive, its mileage and what is fitted.

BMW F30 335i N55B30 Engine 2014, 63,900 km3.759,00 €BMW F30 335i N55B30 Engine 2012, 128,600 km4.444,00 €BMW E92 335i N55B30 Engine 2011, 165,500 km3.592,00 €BMW F15 X5 xDrive35i N55B30 Engine 2012, 159,200 km3.218,00 €BMW F32 435i N55B30 Engine 2013, 50,600 km4.067,00 €BMW F20 M135i N55B30 Engine 2015, 33,700 km3.527,00 €BMW F30 335i N55B30 Engine 2016, 180,600 km4.139,00 €BMW F20 M135i N55B30 Engine 2012, 35,700 km4.411,00 €BMW E92 335i N55B30 Engine 2014, 179,300 km3.970,00 €BMW F32 435i N55B30 Engine 2015, 114,200 km3.572,00 €BMW F30 335i N55B30 Engine 2013, 70,400 km3.568,00 €BMW F20 M135i N55B30 Engine 2011, 193,200 km4.787,00 €

BMW F30 335i N55B30 Engine 2014, 63,900 km — 3.759,00 €, reduced from 4.850,00 €. It comes from a 2014 donor car with 63,900 km, and 29 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F30 335i N55B30 Engine 2012, 128,600 km — 4.444,00 €, reduced from 5.100,00 €. It comes from a 2012 donor car with 128,600 km, and 25 units are available. The listing shows every side of the engine and the fitted parts.

BMW E92 335i N55B30 Engine 2011, 165,500 km — 3.592,00 €, reduced from 4.800,00 €. It comes from a 2011 donor car with 165,500 km, and 30 units are available. The listing shows every side of the engine and the fitted parts.

BMW F15 X5 xDrive35i N55B30 Engine 2012, 159,200 km — 3.218,00 €, reduced from 4.050,00 €. It comes from a 2012 donor car with 159,200 km, and 20 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F32 435i N55B30 Engine 2013, 50,600 km — 4.067,00 €, reduced from 5.150,00 €. It comes from a 2013 donor car with 50,600 km, and 24 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F20 M135i N55B30 Engine 2015, 33,700 km — 3.527,00 €, reduced from 4.100,00 €. It comes from a 2015 donor car with 33,700 km, and 17 units are available. We can confirm fitment against your VIN the same day.

BMW F30 335i N55B30 Engine 2016, 180,600 km — 4.139,00 €, reduced from 4.900,00 €. It comes from a 2016 donor car with 180,600 km, and 11 units are available. We can confirm fitment against your VIN the same day.

BMW F20 M135i N55B30 Engine 2012, 35,700 km — 4.411,00 €, reduced from 5.650,00 €. It comes from a 2012 donor car with 35,700 km, and 22 units are available. The listing shows every side of the engine and the fitted parts.

BMW E92 335i N55B30 Engine 2014, 179,300 km — 3.970,00 €, reduced from 5.200,00 €. It comes from a 2014 donor car with 179,300 km, and 26 units are available. The listing shows every side of the engine and the fitted parts.

BMW F32 435i N55B30 Engine 2015, 114,200 km — 3.572,00 €, reduced from 4.400,00 €. It comes from a 2015 donor car with 114,200 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.

BMW F30 335i N55B30 Engine 2013, 70,400 km — 3.568,00 €, reduced from 4.650,00 €. It comes from a 2013 donor car with 70,400 km, and 24 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F20 M135i N55B30 Engine 2011, 193,200 km — 4.787,00 €, reduced from 5.450,00 €. It comes from a 2011 donor car with 193,200 km, and 14 units are available. We can confirm fitment against your VIN the same day.

Fitting a replacement N55

These are the steps we recommend to every workshop fitting one of our N55 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. Inspect or replace the timing chain parts. Look at the guides and tensioner. On high-mileage engines, replacing them now costs far less than doing it later.
7. Prepare the turbo. Fit new oil feed and return seals, clean the intercooler and pipes of any oil or debris from the old engine, and prime the turbo with oil before starting.
8. 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.
9. 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.
10. 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.
11. Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
12. Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
13. 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.
14. 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

Remaps add a lot; upgraded turbos and fuel pumps take it further.

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.

N55 compared with similar BMW engines

Buyers often compare the N55 with these engines. Here is how they line up.

The N54 is milder (up to 306 hp against 326 hp) and uses timing chain at the front. Its best-known faults are high-pressure fuel pump and wastegate rattle. Read the N54 guide.

The B58 reaches higher outputs (up to 374 hp against 326 hp) and uses timing chain at the rear (gearbox end). Its best-known faults are coolant leaks and oil filter housing. Read the B58 guide.

The M30 is milder (up to 218 hp against 326 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.

Delivery, warranty and payment

Every N55 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 N55 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 N55

Will the N55B30 engine fit my BMW E92 335i?

Yes, if your BMW E92 335i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the E92 335i from about 2010 to 2017.

Some E92 335i cars were built with a different engine: the N54B30. These look alike from the outside, so check the code on your engine or send us your VIN.

Also tell us if your E92 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

How much is a replacement N55B30 engine for a BMW E92 335i?

A used N55B30 for the BMW E92 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

Will the N55B30 engine fit my BMW F30 335i?

Yes, if your BMW F30 335i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F30 335i from about 2010 to 2017.

In our records the N55B30 is the engine for the F30 335i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F30 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

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

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

How much is a replacement N55B30 engine for a BMW F31 335i?

A used N55B30 for the BMW F31 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

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

How much is a replacement N55B30 engine for a BMW F32 435i?

A used N55B30 for the BMW F32 435i 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

Will the N55B30 engine fit my BMW F20 M135i?

Yes, if your BMW F20 M135i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F20 M135i from about 2010 to 2017.

In our records the N55B30 is the engine for the F20 M135i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F20 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

How much is a replacement N55B30 engine for a BMW F20 M135i?

A used N55B30 for the BMW F20 M135i 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

Will the N55B30 engine fit my BMW F15 X5 xDrive35i?

Yes, if your BMW F15 X5 xDrive35i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F15 X5 xDrive35i from about 2010 to 2017.

In our records the N55B30 is the engine for the F15 X5 xDrive35i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Your car has all-wheel drive or is an X model, so the sump, the oil pickup and some brackets can differ from the rear-drive cars. Tell us the full model so we send the right set-up.

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 F15 X5 xDrive35i?

A used N55B30 for the BMW F15 X5 xDrive35i 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

Will the N55B30 engine fit my BMW F25 X3 xDrive35i?

Yes, if your BMW F25 X3 xDrive35i was built with the N55B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the F25 X3 xDrive35i from about 2010 to 2017.

In our records the N55B30 is the engine for the F25 X3 xDrive35i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Your car has all-wheel drive or is an X model, so the sump, the oil pickup and some brackets can differ from the rear-drive cars. Tell us the full model so we send the right set-up.

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 F25 X3 xDrive35i?

A used N55B30 for the BMW F25 X3 xDrive35i 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 in the N55 BMW complete conversion with engine kit?

The N55 BMW complete conversion with engine kit includes: Inspected N55B30 long engine, compression recorded; BMW E36 engine mounts and brackets; Adapter plate, clutch and flywheel; Wiring patch loom and ECU bridge; Intercooler pipes, radiator hoses and downpipe; Fitting notes and torque sheet.

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 7.370 € to 9.840 €, depending on the exact listing. It includes an inspected N55B30 engine, so you get everything from one place.

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 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 is in the N55 BMW adapter plate kit?

The N55 BMW adapter plate kit includes: N55B30 to gearbox adapter plate, machined; Dowels, bolts and alignment sleeve; Pilot bearing; Clutch alignment tool; Fitment drawing.

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 660 € to 1.080 €, 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 is in the N55 BMW engine mount kit?

The N55 BMW engine mount kit includes: Left and right BMW E36 chassis mounts; N55B30 side brackets; Polyurethane bushes; Hardware kit.

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 360 € to 570 €, 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 is in the N55 BMW wiring and ecu kit?

The N55 BMW wiring and ecu kit includes: N55B30 patch loom for the BMW E36; ECU bridge connector; Immobiliser bypass or coded ECU; Sensor pinout sheet; Fuse and relay map.

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 500 € to 820 €, 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 is in the N55 BMW cooling and exhaust kit?

The N55 BMW cooling and exhaust kit includes: Radiator hoses made for this swap; Intercooler pipe set; Downpipe and flex section; Expansion tank adapter; Temperature sender adapter.

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 450 € to 740 €, 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

Can I put an N55B30 engine in my BMW E36?

Yes. We sell conversion kits that fit the N55B30 into the BMW E36. The kit replaces the M52, M54 and M50, and works with the ZF GS6 and Getrag 420G.

You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.

A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.

Tell us your BMW E36's year and current set-up, and we suggest the right parts. 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.

See all N55 BMW Conversion Kits · Conversion guide

Can I put an N55B30 engine in my BMW E46?

Yes. We sell conversion kits that fit the N55B30 into the BMW E46. The kit replaces the M52, M54 and M50, and works with the ZF GS6 and Getrag 420G.

You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.

A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.

Tell us your BMW E46's year and current set-up, and we suggest the right parts. 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.

See all N55 BMW Conversion Kits · Conversion guide

Can I put an N55B30 engine in my BMW E39?

Yes. We sell conversion kits that fit the N55B30 into the BMW E39. The kit replaces the M52, M54 and M50, and works with the ZF GS6 and Getrag 420G.

You can buy the full package with an engine, or only the parts you need: complete conversion with engine, complete conversion, adapter plate, engine mount, wiring and ecu and cooling and exhaust.

A swap like this needs a skilled workshop. Mounts, the adapter, the wiring and the engine computer, the cooling and the exhaust all have to work together. Check your local road rules for engine swaps before you start.

Tell us your BMW E39's year and current set-up, and we suggest the right parts. 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.

See all N55 BMW Conversion Kits · Conversion guide

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 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 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

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 power and torque does the BMW N55B30 have?

From the factory the BMW N55B30 makes 225 kW (306 HP) and 400 Nm of torque. It is a 3.0 liter (2,979 cc) inline 6, DOHC, 24 valve petrol engine with a twin-scroll turbocharger.

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 N55B30 on our site lists its year and mileage. If you want more photos or a short video of a unit, ask the desk and we send them before you pay.

See all N55 Engines · Search N55B30 in the shop

How do I know a used N55B30 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. Ask the desk for more pictures of any listing. We are happy to show the stamp, the ports and the ancillaries before you decide.

On a petrol engine like the N55B30, 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 N55 Engines · Search N55B30 in the shop

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

Is the BMW N55B30 a diesel or petrol engine?

The N55B30 is a petrol engine. It is a 3.0 liter (2,979 cc) inline 6, DOHC, 24 valve unit with a twin-scroll turbocharger, and it was built to the Euro 5 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.

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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.

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How long does delivery of an N55B30 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 should I replace when I fit a used N55B30 engine?

A used engine lasts longest when it starts life in your car with fresh fluids and new seals. 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. Change the drive belt, the thermostat and the water pump seals if they look tired, because they are cheap while the engine is out. 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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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.

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Can you check if an N55B30 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 N55B30, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW F30 335i, BMW F31 335i, BMW E92 335i, BMW F32 435i and BMW F20 M135i and more.

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.

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What should I know about the BMW N55 engine?

BMW N55 3.0 single-turbo petrol engines for F30 335i, M135i and X5 35i. We list one version: N55B30 (3.0 liter (2,979 cc), 225 kW (306 HP), 2010 to 2017).

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 N55 family was used in chassis F30, F31, E92, F32, F20, F15 and F25. Before a unit is listed, the yard checks the engine code against the listing, writes down the parts fitted to it, seals every opening and photographs the real engine you will receive.

Not sure? Send us your VIN and your gearbox code. We match the engine family, the year window and the parts on the engine before anything is reserved, and the check is free.

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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

Which years were BMW N55 engines made?

BMW built the N55 engines we list from about 2010 to 2017. The N55B30 ran from 2010 to 2017.

They went into chassis F30, F31, E92, F32, F20, F15 and F25. 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.

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Glossary

• VANOS — BMW's variable camshaft timing system. It adjusts the intake camshaft (single VANOS) or both camshafts (double VANOS) to improve torque and emissions.
• Valvetronic — BMW's variable valve lift system. It controls engine load with the intake valves instead of a throttle plate, improving economy.
• Direct injection — Fuel is injected directly into the cylinder instead of the intake port. It improves efficiency but can cause carbon build-up on the intake valves.
• Wastegate — A valve that lets exhaust gas bypass the turbine to control boost pressure. Worn wastegates rattle and can cause boost faults.
• Long block — An engine with the block, head and internals but without most ancillaries such as manifolds, turbo, alternator or starter.
• Dressed engine — An engine with most ancillaries fitted, ready to install with fewer parts transferred.
• Compression test — A measurement of the pressure each cylinder builds when cranked. Even readings show healthy rings and valves.
• Leak-down test — A test that pressurises each cylinder and measures how much air escapes, showing where any leak is.
• LCI — Life Cycle Impulse, BMW's name for a mid-life update. Engines often change at the LCI.
• xDrive — BMW's all-wheel-drive system. xDrive cars often use a different sump and oil pickup.
• DME — Digital Motor Electronics, BMW's name for the engine control unit.
• CAS, FEM and BDC — The immobiliser and body modules that must be matched to the engine control unit on modern BMWs.
• Timing chain tensioner — A hydraulic or spring device that keeps the timing chain tight. Worn tensioners cause cold-start rattle.
• Electric water pump — A water pump driven by an electric motor. It needs a diagnostic bleeding routine when the system is refilled.
• TU — Technical Update, BMW's suffix for a revised version of an engine.

Our verdict

The N55 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 N55 will give years of service.

Ready to order, or need help choosing? Browse every N55 in stock, contact the Hamburg desk or send us your VIN on WhatsApp.

Guides to each N55 version

• BMW N55B30 engine: specs, problems and prices
• BMW N55B30T0 engine: specs, problems and prices
• BMW N55B30O0 engine: specs, problems and prices