MINI Cooper (F56) engine: which one, problems and replacement

The MINI Cooper in the third-generation MINI hatch generation (F56, built 2014–2024) was built with one engine, the B38A15: a 1.5 L petrol inline-3 with 136 hp.

This guide tells you which engine your Cooper has, what goes wrong with it, what a replacement costs from our stock and what else to plan for when you fit one.

• Generation: third-generation MINI hatch, 2014–2024
• Body styles: F56 (hatchback)
• Engines: B38A15
• Output: 136 hp
• Replacement engines in stock: 132 from 1.275,00 €

Which engine is in your Cooper?

B38A15 in the Cooper

The B38A15 was used in the F56 Cooper, built 2014–2024. It is a 1.5 L turbocharged petrol inline-3 with 136 hp and 220 Nm.

Reading the code: B marks a B-series code, BMW's modular engine family introduced from 2013 with 500 cc per cylinder; 38 is the family number; A stands for petrol, transverse installation for front-drive cars; 15 is the capacity in decilitres, so 1.5 litres.

Cooper engines by model year

The Cooper kept the same engine for the whole F56 run, which makes ordering simple: any unit with the same code fits, subject to the gearbox, drive type and sump.

Other cars with the same engine as the Cooper

A replacement engine does not have to come from another Cooper. These models left the factory with the same engine code, so a unit from any of them is a candidate donor once the sump, mounts and ancillaries are matched to your car.

B38A15: BMW F40 118i, BMW F45 218i.

How to confirm your engine code

The Cooper only used the B38A15, but the exact version can still change with the build date, gearbox and market. Send us the last seven characters of the VIN and we read the engine code from BMW's records, or look for the code stamped on the block. How to find your BMW engine code.

Known Cooper engine problems

The B38A15 in the Cooper shares the known weak points of the B38 family. Full B38 guide.

Coolant leaks. Thermostat housings and coolant pipes leak.

Ignition coils. Coils fail and cause misfires.

Engine mounts. Three-cylinder vibration finishes mounts.

Carbon build-up. Intake valves carbon up over time.

Symptoms to watch for on the Cooper

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.

Rattle or whine from the gearbox end. On engines with the timing chain at the rear, a rattle or whine from the back of the engine is the warning sign of chain stretch or guide wear.

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.

Looking after the Cooper engine

• Oil: 0W-20 or 0W-30 BMW Longlife-17 FE+ or 01, about 4.25 litres.
• Service interval: Oil every 15,000 km or yearly.
• Timing drive: Timing chain at the rear (gearbox end).
• Workshop notes: Front-drive (B38A) and rear-drive (B38B) versions are not interchangeable without changes.

Buying a used engine for the Cooper: checklist

1. 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.
2. 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.
3. 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.
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. 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.
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. Gearbox-end timing chain. On this engine the timing chain sits at the gearbox end, so replacing it normally means removing the engine. If the chain has not been replaced, the time to do it is before the engine goes into your car.
9. 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.
10. 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.
11. 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.
12. 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.

MINI Cooper replacement engine cost

Across 132 Cooper engine units in our stock today, prices start at 1.275,00 € and reach 2.053,00 €. The median — the price in the middle of the range — is 1.710,00 €.

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.

Cooper engine prices by model year

Engines from 2010–2014 have a median of 1.703,00 €, while units from 2020–2024 sit at 1.757,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

Cooper engine 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.

33 of these come from F56 donor cars, priced from 1.275,00 € to 2.013,00 €. An engine from the same body is the most direct swap because the sump, mounts and ancillaries already match.

On top of the engine, budget for the workshop's labour and the parts that are best replaced while the engine is out: engine mounts, the rear main seal, cooling parts, a clutch or converter seal, fluids and filters.

Replacement engines in stock for the Cooper

These Cooper 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 F56 Mini Cooper B38A15 Engine 2019, 28,300 km1.707,00 €BMW F56 Mini Cooper B38A15 Engine 2016, 163,600 km2.013,00 €BMW F56 Mini Cooper B38A15 Engine 2019, 89,200 km1.374,00 €BMW F56 Mini Cooper B38A15 Engine 2022, 79,500 km1.377,00 €BMW F56 Mini Cooper B38A15 Engine 2017, 29,300 km1.536,00 €BMW F56 Mini Cooper B38A15 Engine 2021, 44,800 km1.728,00 €BMW F56 Mini Cooper B38A15 Engine 2017, 141,100 km1.906,00 €BMW F56 Mini Cooper B38A15 Engine 2021, 98,100 km1.939,00 €BMW F56 Mini Cooper B38A15 Engine 2014, 110,800 km1.429,00 €BMW F56 Mini Cooper B38A15 Engine 2021, 112,300 km1.800,00 €BMW F56 Mini Cooper B38A15 Engine 2021, 133,600 km1.911,00 €BMW F56 Mini Cooper B38A15 Engine 2017, 151,200 km1.275,00 €

BMW F56 Mini Cooper B38A15 Engine 2019, 28,300 km — 1.707,00 €, reduced from 2.350,00 €. It comes from a 2019 donor car with 28,300 km, and 24 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F56 Mini Cooper B38A15 Engine 2016, 163,600 km — 2.013,00 €, reduced from 3.250,00 €. It comes from a 2016 donor car with 163,600 km, and 22 units are available. The listing shows every side of the engine and the fitted parts.

BMW F56 Mini Cooper B38A15 Engine 2019, 89,200 km — 1.374,00 €, reduced from 2.650,00 €. It comes from a 2019 donor car with 89,200 km, and 18 units are available. The listing shows every side of the engine and the fitted parts.

BMW F56 Mini Cooper B38A15 Engine 2022, 79,500 km — 1.377,00 €, reduced from 2.550,00 €. It comes from a 2022 donor car with 79,500 km, and 24 units are available. We can confirm fitment against your VIN the same day.

BMW F56 Mini Cooper B38A15 Engine 2017, 29,300 km — 1.536,00 €, reduced from 2.200,00 €. It comes from a 2017 donor car with 29,300 km, and 10 units are available. The listing shows every side of the engine and the fitted parts.

BMW F56 Mini Cooper B38A15 Engine 2021, 44,800 km — 1.728,00 €, reduced from 2.700,00 €. It comes from a 2021 donor car with 44,800 km, and 14 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F56 Mini Cooper B38A15 Engine 2017, 141,100 km — 1.906,00 €, reduced from 3.000,00 €. It comes from a 2017 donor car with 141,100 km, and 9 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F56 Mini Cooper B38A15 Engine 2021, 98,100 km — 1.939,00 €, reduced from 2.650,00 €. It comes from a 2021 donor car with 98,100 km, and 15 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F56 Mini Cooper B38A15 Engine 2014, 110,800 km — 1.429,00 €, reduced from 2.900,00 €. It comes from a 2014 donor car with 110,800 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.

BMW F56 Mini Cooper B38A15 Engine 2021, 112,300 km — 1.800,00 €, reduced from 3.000,00 €. It comes from a 2021 donor car with 112,300 km, and 28 units are available. The listing shows every side of the engine and the fitted parts.

BMW F56 Mini Cooper B38A15 Engine 2021, 133,600 km — 1.911,00 €, reduced from 2.650,00 €. It comes from a 2021 donor car with 133,600 km, and 17 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F56 Mini Cooper B38A15 Engine 2017, 151,200 km — 1.275,00 €, reduced from 2.750,00 €. It comes from a 2017 donor car with 151,200 km, and 18 units are available. We can confirm fitment against your VIN the same day.

Will it fit my Cooper?

Will the B38A15 fit my MINI F56 Cooper?

Yes, the MINI F56 Cooper left the factory with the B38A15, so a B38A15 from another car is the direct replacement. The third-generation MINI hatch was built 2014–2024, and the B38A15 was produced 2014–2024, so check that your car's build date falls inside that window. Confirm the drive type (front-drive or ALL4), 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 an MINI F56 Cooper?

We have 33 B38A15 engines from F56 donor cars, priced from 1.275,00 € to 2.013,00 €. 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.

Engine swaps and upgrades for the Cooper

These engines were fitted to other versions of the F56 at the factory, which makes them the most practical upgrades: the body was designed around them and many parts are shared.

Can I fit the N47C20 in my Cooper?

It is a full conversion: the N47C20 runs on diesel and the B38A15 on petrol, so the fuel system, wiring, engine control unit, instrument coding and usually the gearbox change too. The gain is 7 hp and 85 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Can I fit the B48A20 in my Cooper?

It is a conversion rather than a replacement: the B48A20 is an inline-4 and your B38A15 an inline-3, so mounts, sump, cooling, exhaust, wiring and the engine control unit all change. The gain is 56 hp and 60 Nm. In Germany and most of Europe an engine swap must be inspected and registered.

Fitting a replacement engine in the Cooper

1. 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.
2. Replace the rear timing chain if in doubt. On engines with the chain at the gearbox end, chain work needs the engine out. If the history is unknown, replace the chain, guides and tensioner before fitting.
3. 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.
4. Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
5. Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
6. 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.
7. 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.
8. 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.
9. 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.

The full fitting and first-start procedure.

Delivery, warranty and payment

Every Cooper 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.

All F56 engines · B38 engine guide · Send us your VIN