BMW F48 X1 and F39 X2 engines: every engine, fitment and price

The second X1 (F48) and first X2 (F39) are front-drive based. Engines include the B38 and B48 petrols and the B37 and B47 diesels.

In total, 6 model and engine combinations are listed for the BMW F48 X1 and F39 X2 in our data, using 3 engine families: B47, B48 and B46 and B38. Production covered 2015–2022 and 2017–2023. We currently hold 127 engines that suit these cars.

Every BMW F48 X1 and F39 X2 engine at a glance

BMW F48 X1 and F39 X2: petrol engines

B48 and B46 in the BMW F48 X1 and F39 X2

For the F39 X2 20i, BMW fitted the B48A20 — 2.0 L, turbocharged, 192 hp. See every B48A20 in stock.

For the F48 X1 20i, BMW fitted the B48A20 — 2.0 L, turbocharged, 192 hp. See every B48A20 in stock.

BMW launched the B48 as the four-cylinder member of the B-series with a 500 cc-per-cylinder layout, twin-scroll turbo and integrated exhaust manifold.

On the B48 and B46, our workshop watches for coolant leaks, oil filter housing gasket and pcv and valve cover. Check front-drive (B48A) or rear-drive (B48B) before ordering.

Read our full B48 and B46 guide

We have 12 B48 and B46 engines that suit the BMW F48 X1 and F39 X2, from 1.641,00 €.

B38 in the BMW F48 X1 and F39 X2

F39 X2 18i: B38B15A, 1.5 L, 140 hp and 220 Nm (2015–2024). See every B38B15A in stock.

For the F48 X1 18i, BMW fitted the B38B15A — 1.5 L, turbocharged, 140 hp. See every B38B15A in stock.

BMW launched the B38 in 2014 as part of its modular B-series.

On the B38, our workshop watches for coolant leaks, ignition coils and engine mounts. Front-drive (B38A) and rear-drive (B38B) versions are not interchangeable without changes.

Read our full B38 guide

We have 10 B38 engines that suit the BMW F48 X1 and F39 X2, from 929,00 €.

BMW F48 X1 and F39 X2: diesel engines

B47 in the BMW F48 X1 and F39 X2

F39 X2 20d: B47C20, 2.0 L, 190 hp and 400 Nm (2014–2026). See every B47C20 in stock.

F48 X1 20d: B47C20, 2.0 L, 190 hp and 400 Nm (2014–2026). See every B47C20 in stock.

BMW launched the B47 in 2014 to replace the N47.

On the B47, our workshop watches for egr cooler, diesel particulate filter and injectors. Check front-drive (B47C) or rear-drive (B47D) before ordering.

Read our full B47 guide

We have 55 B47 engines that suit the BMW F48 X1 and F39 X2, from 1.128,00 €.

Will it fit? BMW F48 X1 and F39 X2 engine questions

Will the B47C20 fit my BMW F39 X2 20d?

Yes, the BMW F39 X2 20d left the factory with the B47C20, so a B47C20 from another car is the direct replacement. The first X2 was built 2017–2023, and the B47C20 was produced 2014–2026, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F39 X2 20d?

We have 4 B47C20 engines in stock, priced from 1.128,00 € to 2.554,00 €. 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 B48A20 fit my BMW F39 X2 20i?

Yes, the BMW F39 X2 20i left the factory with the B48A20, so a B48A20 from another car is the direct replacement. The first X2 was built 2017–2023, and the B48A20 was produced 2014–2024, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F39 X2 20i?

We have 1 B48A20 engine from F39 donor cars, priced from 1.785,00 €. 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 B38B15A fit my BMW F39 X2 18i?

For the BMW F39 X2 18i, the B38B15A is the factory engine and the one to order. The first X2 was built 2017–2023, and the B38B15A was produced 2015–2024, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F39 X2 18i?

We have 3 B38B15A engines from F39 donor cars, priced from 1.352,00 € to 3.204,00 €. 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 B47C20 fit my BMW F48 X1 20d?

For the BMW F48 X1 20d, the B47C20 is the factory engine and the one to order. The second X1 was built 2015–2022, and the B47C20 was produced 2014–2026, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F48 X1 20d?

We have 4 B47C20 engines from F48 donor cars, priced from 1.128,00 € to 2.554,00 €. 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 B48A20 fit my BMW F48 X1 20i?

For the BMW F48 X1 20i, the B48A20 is the factory engine and the one to order. The second X1 was built 2015–2022, and the B48A20 was produced 2014–2024, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F48 X1 20i?

We have 5 B48A20 engines from F48 donor cars, priced from 1.641,00 € to 2.437,00 €. 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 B38B15A fit my BMW F48 X1 18i?

Yes, the BMW F48 X1 18i left the factory with the B38B15A, so a B38B15A from another car is the direct replacement. The second X1 was built 2015–2022, and the B38B15A was produced 2015–2024, so check that your car's build date falls inside that window. Confirm the drive type (front-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 F48 X1 18i?

We have 2 B38B15A engines from F48 donor cars, priced from 1.343,00 € to 2.707,00 €. 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 swap questions for the BMW F48 X1 and F39 X2

Owners often ask whether a more powerful engine from another BMW F48 X1 and F39 X2 model can be fitted. These answers show what each upgrade involves.

Can I fit the B48A20 from the F48 X1 20i into an F39 X2 20d?

It is a full conversion: the B48A20 runs on petrol and the B47C20 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 2 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F39 X2 20i into an F39 X2 20d?

It is a full conversion: the B48A20 runs on petrol and the B47C20 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 2 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F39 X2 20i into an F39 X2 18i?

It is a conversion rather than a replacement. The B48A20 is an inline-4 and the B38B15A an inline-3, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 52 hp and 60 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F48 X1 20i into an F39 X2 18i?

It is a conversion rather than a replacement. The B48A20 is an inline-4 and the B38B15A an inline-3, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 52 hp and 60 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F48 X1 20i into an F48 X1 20d?

It is a full conversion: the B48A20 runs on petrol and the B47C20 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 2 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F39 X2 20i into an F48 X1 20d?

It is a full conversion: the B48A20 runs on petrol and the B47C20 on diesel, so the fuel system, wiring, ECU, instrument coding and usually the gearbox change too. The gain is 2 hp and 0 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F39 X2 20i into an F48 X1 18i?

It is a conversion rather than a replacement. The B48A20 is an inline-4 and the B38B15A an inline-3, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 52 hp and 60 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Can I fit the B48A20 from the F48 X1 20i into an F48 X1 18i?

It is a conversion rather than a replacement. The B48A20 is an inline-4 and the B38B15A an inline-3, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 52 hp and 60 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.

Fitment and swap notes for the BMW F48 X1 and F39 X2

• Front-drive engines (A or C suffix) differ from rear-drive versions.

Engines from the same family usually share mounts and gearbox bolt patterns, but wiring, ECU, sump and cooling differ between versions. Moving to a different family is a conversion, not a replacement.

B47: Remaps add around 30 hp.

B48 and B46: Remaps add 40 to 60 hp easily.

B38: Remaps add modest gains.

Known problems by engine in the BMW F48 X1 and F39 X2

B47

• EGR cooler. Check the recall status for the donor car.
• Diesel particulate filter. Read the soot load.
• Injectors. Read injector correction values.

B48 and B46

• Coolant leaks. Check for coolant loss.
• Oil filter housing gasket. Check the filter housing.
• PCV and valve cover. Look for oil on the head.
• Water pump. Check for coolant trails.

B38

• Coolant leaks. Check for coolant loss.
• Ignition coils. Read misfire counters.
• Engine mounts. Check mounts in the car.
• Carbon build-up. Borescope inspection.

How to identify the right engine for your BMW F48 X1 and F39 X2

Start with the VIN. The last seven characters identify your car in BMW's systems, and from them we can confirm the engine code, the production date, the gearbox and whether the car has xDrive. That is the only reliable way to order.

Next, check the stamp on the block. On most BMW four- and six-cylinder engines it sits on the left side of the block below the intake; on V engines it is usually at the back near the gearbox. The stamp shows the engine code and serial number.

Finally, compare the ancillaries. Two engines with the same code can carry different turbos, injectors, manifolds or sensors depending on the model and market. Our listings show what is fitted to each unit.

BMW F48 X1 and F39 X2 engine prices

Our BMW F48 X1 and F39 X2 engine stock runs to 127 units, priced from 856,00 € to 4.195,00 € with a median of 2.370,00 €.

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.

BMW F48 X1 and F39 X2 engine prices by model year

Engines from 2010–2014 have a median of 3.181,00 €, while units from 2020–2024 sit at 1.709,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.

BMW F48 X1 and F39 X2 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.

BMW F48 X1 and F39 X2 engines in stock now

These BMW F48 X1 and F39 X2 engine 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 F48 X1 xDrive20d B47D20 Engine 2016, 118,500 km3.277,00 €BMW F48 X1 sDrive16d B37C15 Engine 2017, 38,900 km1.856,00 €BMW F48 X1 xDrive20d B47D20 Engine 2014, 46,200 km2.227,00 €BMW F48 X1 xDrive20d B47D20 Engine 2019, 131,800 km2.778,00 €BMW F48 X1 xDrive20d B47D20 Engine 2016, 24,100 km3.192,00 €BMW F48 X1 xDrive20d B47D20 Engine 2019, 125,200 km2.223,00 €BMW F48 X1 xDrive20d B47D20 Engine 2015, 125,800 km3.035,00 €BMW F48 X1 xDrive20d B47D20 Engine 2017, 195,600 km2.274,00 €BMW F48 X1 sDrive16d B37C15 Engine 2015, 162,500 km1.484,00 €BMW F48 X1 sDrive16d B37C15 Engine 2017, 182,100 km1.742,00 €BMW F48 X1 sDrive16d B37C15 Engine 2020, 53,600 km1.674,00 €BMW F48 X1 xDrive20d B47D20 Engine 2018, 140,900 km3.076,00 €

BMW F48 X1 xDrive20d B47D20 Engine 2016, 118,500 km — 3.277,00 €, reduced from 4.500,00 €. It comes from a 2016 donor car with 118,500 km, and 30 units are available. The listing shows every side of the engine and the fitted parts.

BMW F48 X1 sDrive16d B37C15 Engine 2017, 38,900 km — 1.856,00 €, reduced from 3.200,00 €. It comes from a 2017 donor car with 38,900 km, and 16 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F48 X1 xDrive20d B47D20 Engine 2014, 46,200 km — 2.227,00 €, reduced from 3.200,00 €. It comes from a 2014 donor car with 46,200 km, and 26 units are available. The listing shows every side of the engine and the fitted parts.

BMW F48 X1 xDrive20d B47D20 Engine 2019, 131,800 km — 2.778,00 €, reduced from 3.600,00 €. It comes from a 2019 donor car with 131,800 km, and 17 units are available. We can confirm fitment against your VIN the same day.

BMW F48 X1 xDrive20d B47D20 Engine 2016, 24,100 km — 3.192,00 €, reduced from 3.950,00 €. It comes from a 2016 donor car with 24,100 km, and 23 units are available. The listing shows every side of the engine and the fitted parts.

BMW F48 X1 xDrive20d B47D20 Engine 2019, 125,200 km — 2.223,00 €, reduced from 3.300,00 €. It comes from a 2019 donor car with 125,200 km, and 15 units are available. The listing shows every side of the engine and the fitted parts.

BMW F48 X1 xDrive20d B47D20 Engine 2015, 125,800 km — 3.035,00 €, reduced from 3.700,00 €. It comes from a 2015 donor car with 125,800 km, and 18 units are available. We can confirm fitment against your VIN the same day.

BMW F48 X1 xDrive20d B47D20 Engine 2017, 195,600 km — 2.274,00 €, reduced from 3.100,00 €. It comes from a 2017 donor car with 195,600 km, and 11 units are available. We can confirm fitment against your VIN the same day.

BMW F48 X1 sDrive16d B37C15 Engine 2015, 162,500 km — 1.484,00 €, reduced from 2.600,00 €. It comes from a 2015 donor car with 162,500 km, and 26 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F48 X1 sDrive16d B37C15 Engine 2017, 182,100 km — 1.742,00 €, reduced from 2.800,00 €. It comes from a 2017 donor car with 182,100 km, and 27 units are available. Ask the desk for compression figures or extra photographs before you order.

BMW F48 X1 sDrive16d B37C15 Engine 2020, 53,600 km — 1.674,00 €, reduced from 2.350,00 €. It comes from a 2020 donor car with 53,600 km, and 19 units are available. The listing shows every side of the engine and the fitted parts.

BMW F48 X1 xDrive20d B47D20 Engine 2018, 140,900 km — 3.076,00 €, reduced from 4.000,00 €. It comes from a 2018 donor car with 140,900 km, and 25 units are available. We can confirm fitment against your VIN the same day.

Buying checklist for a BMW F48 X1 and F39 X2 engine

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. Injector correction values. On a diesel that can be run before removal, the injector correction values show whether one injector is delivering more or less fuel than the others. Large deviations mean an injector is on its way out.
13. Particulate filter and EGR history. Short-trip diesels clog their DPF and EGR systems. The engine may be fine, but ask whether the donor car had DPF warnings, and plan to clean or check your own filter before fitting.
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
19. 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.

Fitting an engine to your BMW F48 X1 and F39 X2

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. 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.
8. 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.
9. Code the injectors and bleed the fuel. Enter the injector correction codes into the ECU, check the glow plugs and bleed the fuel system so the engine does not crank dry.
10. Check the particulate filter. If the old engine failed with oil or coolant entering the exhaust, the DPF may be contaminated. Check its back-pressure before relying on it.
11. 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.
12. 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.
13. 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.
14. Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
15. Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
16. 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.
17. 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.

Diagnosing engine trouble in a BMW F48 X1 and F39 X2

If your current engine is showing one of these symptoms, this table helps you judge whether it can be repaired or whether a replacement engine 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.

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.

Black smoke under acceleration. Too much fuel for the air available: boost leaks, a sticking EGR valve, a dirty air mass meter or a leaking injector.

Hard starting when cold. Glow plugs or the glow plug control unit. On older diesels, also check the injection pump and fuel lines for air leaks.

Particulate filter warning. Short trips stop the DPF from regenerating. A long motorway run often clears it; a filter that keeps blocking may be covering an injector, EGR or turbo problem.

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 the engine in your BMW F48 X1 and F39 X2?

As a rule, bolt-on faults are worth repairing and internal damage is not. Seals, sensors, coils, injectors, pumps and turbos can be replaced in the car. Once the bearings, crankshaft, bores or head of an engine are damaged, a used engine is usually cheaper and quicker than a rebuild.

Timing chain work on the engine needs the engine removed. When the chain has failed and damaged valves or pistons, a replacement engine with a sound chain is often the same price as the repair.

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.

Delivery, warranty and payment

Before a BMW F48 X1 and F39 X2 engine leaves our Hamburg yard it is drained of oil and coolant, every opening is sealed, and it is strapped to a pallet and wrapped. We send photographs of the packed unit and the tracking details.

Delivery is door to door and included in the price. Most European addresses receive the engine within five to ten working days; Germany and its neighbours are usually faster.

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.

We deliver BMW F48 X1 and F39 X2 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 about BMW F48 X1 and F39 X2 engines

Will the B47D20 engine fit my BMW F48 X1 xDrive20d?

Yes, if your BMW F48 X1 xDrive20d was built with the B47D20. BMW used this 2.0 liter (1,995 cc) diesel engine with 140 kW (190 HP) in the F48 X1 xDrive20d from about 2014 to 2023.

In our records the B47D20 is the engine for the F48 X1 xDrive20d, 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 B47 Engines · Search B47D20 in the shop

How much is a replacement B47D20 engine for a BMW F48 X1 xDrive20d?

A used B47D20 for the BMW F48 X1 xDrive20d costs from about 2.150 € to 3.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B47D20 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 B47 Engines · Search B47D20 in the shop

Will the B37C15 engine fit my BMW F48 X1 sDrive16d?

Yes, if your BMW F48 X1 sDrive16d was built with the B37C15. BMW used this 1.5 liter (1,496 cc) diesel engine with 85 kW (116 HP) in the F48 X1 sDrive16d from about 2015 to 2022.

In our records the B37C15 is the engine for the F48 X1 sDrive16d, 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 B37 Engines · Search B37C15 in the shop

How much is a replacement B37C15 engine for a BMW F48 X1 sDrive16d?

A used B37C15 for the BMW F48 X1 sDrive16d costs from about 1.150 € to 1.950 € 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 B37C15 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 B37 Engines · Search B37C15 in the shop

Will the B46B20 engine fit my BMW F48 X1 xDrive25i?

Yes, if your BMW F48 X1 xDrive25i was built with the B46B20. BMW used this 2.0 liter (1,998 cc) petrol engine with 170 kW (231 HP) in the F48 X1 xDrive25i from about 2015 to 2023.

In our records the B46B20 is the engine for the F48 X1 xDrive25i, 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 B46 Engines · Search B46B20 in the shop

How much is a replacement B46B20 engine for a BMW F48 X1 xDrive25i?

A used B46B20 for the BMW F48 X1 xDrive25i costs from about 2.150 € to 3.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B46B20 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 B46 Engines · Search B46B20 in the shop

Will the B46B20 engine fit my BMW F39 X2 xDrive25i?

Yes, if your BMW F39 X2 xDrive25i was built with the B46B20. BMW used this 2.0 liter (1,998 cc) petrol engine with 170 kW (231 HP) in the F39 X2 xDrive25i from about 2015 to 2023.

In our records the B46B20 is the engine for the F39 X2 xDrive25i, 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 B46 Engines · Search B46B20 in the shop

How much is a replacement B46B20 engine for a BMW F39 X2 xDrive25i?

A used B46B20 for the BMW F39 X2 xDrive25i costs from about 2.150 € to 3.450 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B46B20 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 B46 Engines · Search B46B20 in the shop

Will the B38A15 engine fit my BMW F48 X1 sDrive18i?

Yes, if your BMW F48 X1 sDrive18i was built with the B38A15. BMW used this 1.5 liter (1,499 cc) petrol engine with 100 kW (136 HP) in the F48 X1 sDrive18i from about 2014 to 2024.

In our records the B38A15 is the engine for the F48 X1 sDrive18i, 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 B38 Engines · Search B38A15 in the shop

How much is a replacement B38A15 engine for a BMW F48 X1 sDrive18i?

A used B38A15 for the BMW F48 X1 sDrive18i costs from about 1.250 € to 2.100 € 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 B38A15 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 B38 Engines · Search B38A15 in the shop

Questions about the engines in the BMW F48 X1 and F39 X2

Will the B47D20 engine fit my BMW G01 X3 xDrive20d?

Yes, if your BMW G01 X3 xDrive20d was built with the B47D20. BMW used this 2.0 liter (1,995 cc) diesel engine with 140 kW (190 HP) in the G01 X3 xDrive20d from about 2014 to 2023.

In our records the B47D20 is the engine for the G01 X3 xDrive20d, 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 B47 Engines · Search B47D20 in the shop

Does a used B38A15 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 B38 Engines · Search B38A15 in the shop

Does a used B47D20T 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 B47 Engines · Search B47D20T in the shop

Will the B48B20 engine fit my BMW F40 128ti?

Yes, if your BMW F40 128ti was built with the B48B20. BMW used this 2.0 liter (1,998 cc) petrol engine with 190 kW (258 HP) in the F40 128ti from about 2015 to 2025.

In our records the B48B20 is the engine for the F40 128ti, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your F40 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 B48 Engines · Search B48B20 in the shop

Are there other versions of the BMW B48B20?

In our yard the B48B20 is the only listed version of the B48 family. It makes 190 kW (258 HP) and 400 Nm, and was built from 2015 to 2025.

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 B48 Engines · Search B48B20 in the shop

What comes with a used B48B20 engine?

Each B48B20 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 B48 Engines · Search B48B20 in the shop

Will the B48B20 engine fit my BMW G21 330i?

Yes, if your BMW G21 330i was built with the B48B20. BMW used this 2.0 liter (1,998 cc) petrol engine with 190 kW (258 HP) in the G21 330i from about 2015 to 2025.

In our records the B48B20 is the engine for the G21 330i, which makes the match simple. Still, check the code on your old engine or send us your VIN.

Also tell us if your G21 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 B48 Engines · Search B48B20 in the shop

Are there other versions of the BMW B38A15?

In our yard the B38A15 is the only listed version of the B38 family. It makes 100 kW (136 HP) and 220 Nm, and was built from 2014 to 2024.

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 B38 Engines · Search B38A15 in the shop

How much is a replacement B48B20 engine for a BMW G01 X3 xDrive30i?

A used B48B20 for the BMW G01 X3 xDrive30i costs from about 2.650 € to 4.200 € in our yard. The price depends on the year, the mileage and the parts that come with the engine.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Inside the EU there is no import duty. Outside the EU, the receiver pays local duty and VAT.

A replacement engine is often much cheaper than rebuilding a damaged one, and much faster. The B48B20 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 B48 Engines · Search B48B20 in the shop

What should I check on a used BMW B38 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 a B38 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 B38 Engines · Inspection certificate

How much is a replacement B38A15 engine for a BMW F45 218i?

A used B38A15 for the BMW F45 218i costs from about 1.250 € to 2.100 € 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 B38A15 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 B38 Engines · Search B38A15 in the shop

Can you check if a B48B20 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 B48B20, we confirm that your car was built with this code or with a version that can take it. BMW used it in the BMW G20 330i, BMW G21 330i, BMW G30 530i, BMW G01 X3 xDrive30i and BMW F30 330i 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.

See all B48 Engines · Search B48B20 in the shop

What should I replace when I fit a used B47D20T engine?

A used engine lasts longest when it starts life in your car with fresh fluids and new seals. Clean the intercooler and the intake pipes, and fill the turbo oil feed with clean oil before the first start, so the turbo never runs dry. Fit a new oil filter and fresh oil of the grade BMW lists for this engine, and refill the coolant with the correct BMW antifreeze mix. Use new gaskets for the exhaust manifold, the intake and the sump plug, and check every hose clip before the first start.

Look at the engine mounts and the clutch or the torque converter while the engine is out. Old mounts can crack a new engine's brackets, and a worn clutch is much easier to change now.

Before the first start, turn the engine over without fuel until the oil pressure light goes out. Then let it idle, check for leaks, and drive gently for the first few hundred kilometres.

The warranty asks for fitting by a qualified mechanic and the correct oil, coolant and filters. Keep your receipts in case you ever need to make a claim.

See all B47 Engines · Search B47D20T in the shop

What is the BMW B38A15 engine?

The BMW B38A15 is a 1.5 liter (1,499 cc) petrol engine from the B38 family. It has an inline 3, DOHC, 12 valve layout with a single turbocharger, and makes 100 kW (136 HP) with 220 Nm of torque. BMW built it from 2014 to 2024 and it meets the Euro 6 emission standard.

You find the B38A15 in the BMW F20 118i, BMW F40 118i, BMW F45 218i and BMW F48 X1 sDrive18i. What we list: BMW B38 1.5 three-cylinder turbo petrol engines for 118i and 218i.

At Autowerke Engines every B38A15 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 B38 Engines · Search B38A15 in the shop

How long does delivery of a B47D20T engine take?

Orders confirmed before 14:00 CET on a working day leave Hamburg the same day. Later and weekend orders leave the next working day. Delivery to the Netherlands, Belgium, Germany, France, Luxembourg and Denmark takes 1 to 3 working days.

Spain, Italy, Portugal, Poland, Czechia, Austria, Ireland, the Nordics and the Baltics take 2 to 5 working days. Greek and Spanish islands, Malta, Cyprus and remote areas take 4 to 8 working days. The UK and other countries outside the EU are quoted one by one.

Shipping is a flat 249 € per order. It is added once at checkout and printed on the invoice, so there is no extra fee later. Every engine is drained, sealed at each opening, strapped to a heat-treated pallet and shrink-wrapped, then photographed before it leaves the yard.

You get a tracking number when the pallet is collected. Check the wrapping before you sign, and note any damage on the paperwork.

See all B47 Engines · Search B47D20T in the shop

What should I know about the BMW B48 engine?

BMW B48 2.0 turbo petrol engines for 330i, 530i, X3 and 1 Series. We list one version: B48B20 (2.0 liter (1,998 cc), 190 kW (258 HP), 2015 to 2025).

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 B48 family was used in chassis G20, G21, G30, G01, F30, F40 and G22. 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.

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 B48 Engines

Is the BMW B47D20 a diesel or petrol engine?

The B47D20 is a diesel engine. It is a 2.0 liter (1,995 cc) inline 4, DOHC, 16 valve unit with a variable-geometry turbocharger, and it was built to the Euro 6 emission standard.

The emission standard matters for registration and for low-emission zones in many cities. When you replace an engine with the same code, the car keeps the same paperwork and the same emission class.

Diesel versions need the matching exhaust treatment parts on the car to stay legal and to keep the engine computer happy. Reuse the parts from your car if they are in good condition.

If you are not sure which version you need, send us your VIN. We tell you the right code for free.

See all B47 Engines · Search B47D20 in the shop

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.
• DPF — Diesel particulate filter. It traps soot and burns it off during regeneration, which needs longer journeys.
• EGR — Exhaust gas recirculation. It feeds some exhaust back into the intake to reduce NOx emissions but builds up soot.
• Common rail — A diesel injection system with a high-pressure fuel rail feeding all injectors. It allows precise, multiple injections per cycle.
• 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.
• Rear-mounted timing chain — A timing chain at the gearbox end of the engine. Replacing it normally requires removing the engine.
• TU — Technical Update, BMW's suffix for a revised version of an engine.

Our verdict

The BMW F48 X1 and F39 X2 offers a wide choice of engines, and the right replacement depends on your exact model, build date and gearbox. Confirm the code with your VIN, choose a unit with known history, replace the known weak parts while it is out, and the car will be back on the road for years.

See every BMW F48 X1 and F39 X2 engine in stock, or ask the Hamburg desk to check your VIN.

Model-by-model engine guides

• BMW X1 18i (F48) engine: which one, problems and replacement
• BMW X2 18i (F39) engine: which one, problems and replacement