The Z3 (1995 to 2002) and the three Z4 generations used the M43, M44, M52, M54, N52, N20, N54, B48 and B58 petrols, and the S50, S52 and S54 in the M models.
In total, 13 model and engine combinations are listed for the BMW Z3 and Z4 in our data, using 8 engine families: M54, S54, N52, N54, B58, M52, M42 and M44 and S50 and S52. Production covered 1995–2002, 2002–2008, 2006–2008, 2009–2016 and 2018–. We currently hold 76 engines that suit these cars.
Every BMW Z3 and Z4 engine at a glance
| Model | Engine code | Fuel | Power | Torque | Years |
|---|---|---|---|---|---|
| E85 Z4 2.5 | M54B25 | Petrol | 192 hp | 245 Nm | 2000–2006 |
| E85 Z4 3.0 | M54B30 | Petrol | 231 hp | 300 Nm | 2000–2006 |
| E85 Z4 M | S54B32 | Petrol | 343 hp | 365 Nm | 2000–2006 |
| E85 Z4 2.5si | N52B25 | Petrol | 218 hp | 250 Nm | 2004–2011 |
| E86 Z4 M | S54B32 | Petrol | 343 hp | 365 Nm | 2000–2006 |
| E89 Z4 30i | N52B30 | Petrol | 258 hp | 300 Nm | 2004–2015 |
| E89 Z4 35i | N54B30 | Petrol | 306 hp | 400 Nm | 2006–2016 |
| G29 Z4 M40i | B58B30 | Petrol | 340 hp | 500 Nm | 2015–2026 |
| G29 Z4 M40i | B58B30M1 | Petrol | 374 hp | 500 Nm | 2019–2026 |
| Z3 2.0 | M52B20 | Petrol | 150 hp | 190 Nm | 1994–2000 |
| Z3 2.8 | M52B28 | Petrol | 193 hp | 280 Nm | 1995–2000 |
| Z3 1.9 | M44B19 | Petrol | 140 hp | 180 Nm | 1996–2000 |
| Z3 M | S52B32 | Petrol | 240 hp | 320 Nm | 1996–2000 |
BMW Z3 and Z4: petrol engines
M54 in the BMW Z3 and Z4
For the E85 Z4 2.5, BMW fitted the M54B25 — 2.5 L, naturally aspirated, 192 hp. See every M54B25 in stock.
For the E85 Z4 3.0, BMW fitted the M54B30 — 3.0 L, naturally aspirated, 231 hp. See every M54B30 in stock.
BMW introduced the M54 in 2000 at 2.2, 2.5 and 3.0 litres, with double VANOS, an electronic throttle and the DISA variable intake.
On the M54, our workshop watches for crankcase ventilation (ccv), disa valve flap and cooling system. Change the CCV system and DISA valve before fitting a used M54. Both are cheap compared with an engine.
We have 5 M54 engines that suit the BMW Z3 and Z4, from 1.670,00 €.
N52 in the BMW Z3 and Z4
For the E85 Z4 2.5si, BMW fitted the N52B25 — 2.5 L, naturally aspirated, 218 hp. See every N52B25 in stock.
For the E89 Z4 30i, BMW fitted the N52B30 — 3.0 L, naturally aspirated, 258 hp. See every N52B30 in stock.
BMW introduced the N52 with a magnesium-aluminium composite block, Valvetronic, double VANOS and an electric water pump.
On the N52, our workshop watches for hydraulic lifter tick, electric water pump and thermostat and valve cover gasket and eccentric shaft sensor. Fit a new water pump and thermostat with any used N52; they are on the outside and cheap compared with labour later.
N54 in the BMW Z3 and Z4
For the E89 Z4 35i, BMW fitted the N54B30 — 3.0 L, twin-turbo, 306 hp. See every N54B30 in stock.
BMW launched the N54 in 2006 with two small turbochargers, piezo direct injection, double VANOS and an aluminium block with a closed deck.
On the N54, our workshop watches for high-pressure fuel pump, wastegate rattle and piezo injectors. Fit new plugs, check injectors and confirm the HPFP revision before installing.
We have 4 N54 engines that suit the BMW Z3 and Z4, from 2.382,00 €.
B58 in the BMW Z3 and Z4
G29 Z4 M40i: B58B30, 3.0 L, 340 hp and 500 Nm (2015–2026). See every B58B30 in stock.
G29 Z4 M40i: B58B30M1, 3.0 L, 374 hp and 500 Nm (2019–2026). See every B58B30M1 in stock.
BMW launched the B58 in 2015 with a closed-deck block, twin-scroll turbo and integrated manifold.
On the B58, our workshop watches for coolant leaks, oil filter housing and pcv valve. Check the version (B58B30M0, M1 or TU) before ordering.
We have 4 B58 engines that suit the BMW Z3 and Z4, from 3.606,00 €.
M52 in the BMW Z3 and Z4
The Z3 2.0 uses the M52B20, a 2.0 L inline-6 rated at 150 hp and 190 Nm, built 1994–2000.
For the Z3 2.8, BMW fitted the M52B28 — 2.8 L, naturally aspirated, 193 hp.
The M52 arrived in 1994 with an aluminium block, Nikasil cylinder coating in most markets and single VANOS.
On the M52, our workshop watches for nikasil bore wear, cooling system and vanos seals and solenoids. Ask whether the block is Nikasil or Alusil. Engines built from late 1998 use Alusil.
We have 3 M52 engines that suit the BMW Z3 and Z4, from 1.311,00 €.
M42 and M44 in the BMW Z3 and Z4
The Z3 1.9 uses the M44B19, a 1.9 L inline-4 rated at 140 hp and 180 Nm, built 1996–2000.
The M42 arrived in 1989 at 1.8 litres with two chain-driven camshafts, four valves per cylinder and hydraulic lifters.
On the M42 and M44, our workshop watches for head gasket, timing chain guides and tensioner and valve cover and oil leaks. Hydraulic lifters mean no valve adjustment, but they need clean oil of the right viscosity to stay quiet.
Read our full M42 and M44 guide
We have 1 M42 and M44 engines that suit the BMW Z3 and Z4, from 1.381,00 €.
BMW Z3 and Z4: m and performance engines
S54 in the BMW Z3 and Z4
For the E85 Z4 M, BMW fitted the S54B32 — 3.2 L, naturally aspirated, 343 hp. See every S54B32 in stock.
For the E86 Z4 M, BMW fitted the S54B32 — 3.2 L, naturally aspirated, 343 hp. See every S54B32 in stock.
BMW Motorsport launched the S54 in 2000 with an iron block, individual throttle bodies and high-pressure double VANOS.
On the S54, our workshop watches for rod bearings, vanos unit and valve clearances. Fit new rod bearings and upgraded VANOS parts when installing a used S54. It is easier with the engine out.
We have 59 S54 engines that suit the BMW Z3 and Z4, from 2.915,00 €.
S50 and S52 in the BMW Z3 and Z4
Z3 M: S52B32, 3.2 L, 240 hp and 320 Nm (1996–2000).
BMW Motorsport launched the S50B30 in 1992 with single VANOS and individual throttle bodies.
On the S50 and S52, our workshop watches for oil pump nut, vanos (s50b32) and cooling system. Fit a new oil pump nut and safety wire when the sump is off.
Read our full S50 and S52 guide
Will it fit? BMW Z3 and Z4 engine questions
Will the M54B25 fit my BMW E85 Z4 2.5?
Yes, the BMW E85 Z4 2.5 left the factory with the M54B25, so an M54B25 from another car is the direct replacement. The first Z4 roadster was built 2002–2008, and the M54B25 was produced 2000–2006, 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 E85 Z4 2.5?
We have 3 M54B25 engines from E85 donor cars, priced from 1.670,00 € to 2.614,00 €. 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 M54B30 fit my BMW E85 Z4 3.0?
For the BMW E85 Z4 3.0, the M54B30 is the factory engine and the one to order. The first Z4 roadster was built 2002–2008, and the M54B30 was produced 2000–2006, 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 E85 Z4 3.0?
We have 1 M54B30 engine from E85 donor cars, priced from 2.217,00 €. 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 N52B25 fit my BMW E85 Z4 2.5si?
For the BMW E85 Z4 2.5si, the N52B25 is the factory engine and the one to order. The first Z4 roadster was built 2002–2008, and the N52B25 was produced 2004–2011, 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 E85 Z4 2.5si?
We do not have an N52B25 on the shelf for the E85 Z4 2.5si at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the S54B32 fit my BMW E86 Z4 M?
For the BMW E86 Z4 M, the S54B32 is the factory engine and the one to order. The first Z4 coupé was built 2006–2008, and the S54B32 was produced 2000–2006, 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 E86 Z4 M?
We have 29 S54B32 engines from E86 donor cars, priced from 6.369,00 € to 13.476,00 €. 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 N52B30 fit my BMW E89 Z4 30i?
Yes, the BMW E89 Z4 30i left the factory with the N52B30, so an N52B30 from another car is the direct replacement. The second Z4 was built 2009–2016, and the N52B30 was produced 2004–2015, 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 E89 Z4 30i?
We do not have an N52B30 on the shelf for the E89 Z4 30i at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Will the N54B30 fit my BMW E89 Z4 35i?
For the BMW E89 Z4 35i, the N54B30 is the factory engine and the one to order. The second Z4 was built 2009–2016, and the N54B30 was produced 2006–2016, 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 E89 Z4 35i?
We have 4 N54B30 engines from E89 donor cars, priced from 2.382,00 € to 5.013,00 €. 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.
Will the B58B30 fit my BMW G29 Z4 M40i?
For the BMW G29 Z4 M40i, the B58B30 is the factory engine and the one to order. The third Z4 was built 2018–, and the B58B30 was produced 2015–2026, 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 G29 Z4 M40i?
We have 4 B58B30 engines from G29 donor cars, priced from 3.606,00 € to 7.563,00 €. 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 B58B30M1 fit my BMW G29 Z4 M40i?
For the BMW G29 Z4 M40i, the B58B30M1 is the factory engine and the one to order. The third Z4 was built 2018–, and the B58B30M1 was produced 2019–2026, 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 G29 Z4 M40i?
We have 1 B58B30M1 engine from G29 donor cars, priced from 3.606,00 €. 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 M52B20 fit my BMW Z3 2.0?
For the BMW Z3 2.0, the M52B20 is the factory engine and the one to order. The Z3 roadster and coupé was built 1995–2002, and the M52B20 was produced 1994–2000, 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 Z3 2.0?
We have 1 M52B20 engine from Z3 donor cars, priced from 1.311,00 €. 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 M44B19 fit my BMW Z3 1.9?
The M44B19 is the original engine for the BMW Z3 1.9, which makes it the straightforward choice. The Z3 roadster and coupé was built 1995–2002, and the M44B19 was produced 1996–2000, 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 Z3 1.9?
We have 1 M44B19 engine from Z3 donor cars, priced from 1.381,00 €. 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 S52B32 fit my BMW Z3 M?
The S52B32 is the original engine for the BMW Z3 M, which makes it the straightforward choice. The Z3 roadster and coupé was built 1995–2002, and the S52B32 was produced 1996–2000, 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 Z3 M?
We do not have an S52B32 on the shelf for the Z3 M at the moment. Units arrive regularly; send us your VIN and we will tell you when the next one is ready and what it will cost, including delivery.
Engine swap questions for the BMW Z3 and Z4
Owners often ask whether a more powerful engine from another BMW Z3 and Z4 model can be fitted. These answers show what each upgrade involves.
Can I fit the N54B30 from the E89 Z4 35i into an E85 Z4 2.5?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N54B30 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 114 hp and 155 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S54B32 from the E85 Z4 M into an E85 Z4 2.5?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S54B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 151 hp and 120 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the N54B30 from the E89 Z4 35i into an E85 Z4 3.0?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N54B30 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 75 hp and 100 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S52B32 from the Z3 M into an E85 Z4 3.0?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S52B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 9 hp and 20 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the B58B30M1 from the G29 Z4 M40i into an E85 Z4 M?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the B58B30M1 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 31 hp and 135 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the N54B30 from the E89 Z4 35i into an E85 Z4 2.5si?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N54B30 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 88 hp and 150 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S52B32 from the Z3 M into an E85 Z4 2.5si?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S52B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 22 hp and 70 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the B58B30M1 from the G29 Z4 M40i into an E86 Z4 M?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the B58B30M1 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 31 hp and 135 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the N54B30 from the E89 Z4 35i into an E89 Z4 30i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N54B30 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 48 hp and 100 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the B58B30M1 from the G29 Z4 M40i into an E89 Z4 30i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the B58B30M1 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 116 hp and 200 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S54B32 from the E85 Z4 M into an E89 Z4 35i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S54B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 37 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 S54B32 from the E86 Z4 M into an E89 Z4 35i?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S54B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 37 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 S52B32 from the Z3 M into a Z3 2.0?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S52B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 90 hp and 130 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the B58B30M1 from the G29 Z4 M40i into a Z3 2.0?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the B58B30M1 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 224 hp and 310 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the N52B25 from the E85 Z4 2.5si into a Z3 2.8?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N52B25 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 25 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 N52B30 from the E89 Z4 30i into a Z3 2.8?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the N52B30 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 65 hp and 20 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the M52B28 from the Z3 2.8 into a Z3 1.9?
It is a conversion rather than a replacement. The M52B28 is an inline-6 and the M44B19 an inline-4, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 53 hp and 100 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S54B32 from the E85 Z4 M into a Z3 1.9?
It is a conversion rather than a replacement. The S54B32 is an inline-6 and the M44B19 an inline-4, so mounts, sump, cooling, exhaust, wiring and ECU all change. The gain is 203 hp and 185 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S54B32 from the E85 Z4 M into a Z3 M?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S54B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 103 hp and 45 Nm. In Germany and most of Europe a swap must be inspected and registered; check with your testing station first.
Can I fit the S54B32 from the E86 Z4 M into a Z3 M?
It is possible, and it is one of the more common upgrades. Both engines are petrol inline-6 units, so the engine bay and mounting points are similar, but the S54B32 needs its own wiring harness and ECU, the matching gearbox or clutch, and often a different sump, cooling and exhaust. The gain is 103 hp and 45 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 Z3 and Z4
- Z4 M models use the S54.
- The G29 Z4 shares its platform with the Toyota Supra.
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.
M54: An M54B30 is a common upgrade for E46 325i and Z4 2.5 owners. Remaps add a little; most power gains come from an S54 or a forced-induction kit.
S54: CSL airboxes, intake camshafts, headers and a remap add power. Most owners value reliability over peak power and focus on bearings and VANOS.
N52: Gains come from intake and exhaust work and a remap. Owners wanting more usually move to an N54 or N55 swap.
N54: The N54 responds strongly to remaps and bigger turbos. Well-built examples exceed 500 hp with upgraded fuelling.
B58: Remaps add 80 to 100 hp; it is the base for many swaps.
M52: The M52B28 is the base for many E36 builds: an S52 or M50 intake manifold, a remap and a better exhaust wake it up. Strokers to 3.0 litres use M54B30 parts.
M42 and M44: Popular upgrades are a re-mapped ECU, a 2.0 litre stroker kit and individual throttle bodies. Many owners use an M44 to replace a tired M42 in an E30 318is.
S50 and S52: S52 owners often fit a Schrick camshaft and an S50 manifold. Many E30 builds use an S52 for its torque and simplicity.
Known problems by engine in the BMW Z3 and Z4
M54
- Crankcase ventilation (CCV). Pull the dipstick at idle: strong suction or a whistle points to the CCV.
- DISA valve flap. Remove the valve and check for play in the flap.
- Cooling system. Look for white coolant stains and check the impeller.
- Oil filter housing and valve cover gaskets. Look at the exhaust side and down the front of the block.
- Oil consumption from piston rings. Ask for consumption figures; a compression test is useful.
S54
- Rod bearings. Ask when the rod bearings were last replaced; an oil analysis helps.
- VANOS unit. Check for VANOS codes and ask about upgraded bolts and pump disc.
- Valve clearances. Ask for the last adjustment.
- Throttle actuator. Check for throttle fault codes.
- Oil consumption. Ask for the consumption log.
N52
- Hydraulic lifter tick. Listen on a cold start; a tick that fades is normal-ish.
- Electric water pump and thermostat. Check for cooling codes and service history.
- Valve cover gasket and eccentric shaft sensor. Look for oil on the exhaust side.
- Oil filter housing gasket. Check below the filter housing.
- VANOS solenoids. Read the VANOS adaption values.
N54
- High-pressure fuel pump. Check the part number and for fuel pressure codes.
- Wastegate rattle. Listen when lifting off throttle and check for oil smoke.
- Piezo injectors. Check the injector index revisions.
- Electric water pump. Ask when it was replaced.
- Charge pipe and oil leaks. Look for oil and listen for boost leaks.
- Carbon build-up. Borescope inspection.
B58
- Coolant leaks. Check for coolant loss.
- Oil filter housing. Check below the housing.
- PCV valve. Look for oil in the intake.
M52
- Nikasil bore wear. A compression or leak-down test is the only reliable check; Alusil and iron-block units are not affected.
- Cooling system. Look at the date of the last cooling refresh and check for a metal impeller.
- VANOS seals and solenoids. Listen for a diesel-like rattle at idle and check for torque loss low down.
- DISA valve (M52TU). Remove the DISA valve and check the flap pin for play.
- Crankcase ventilation. Look for oil in the intake and smoke on start.
M42 and M44
- Head gasket. Check for mayonnaise under the oil cap and for coolant loss without visible leaks.
- Timing chain guides and tensioner. Listen at the front of the engine on a cold start.
- Valve cover and oil leaks. Pull a coil or plug lead and look for oil.
- Plastic cooling parts. Look for white coolant stains and check the water pump impeller type.
S50 and S52
- Oil pump nut. Ask whether the oil pump nut has been secured.
- VANOS (S50B32). Listen for rattle at idle and check for fault codes.
- Cooling system. Look for a recent cooling refresh.
- Valve cover and oil leaks. Check the front of the head for oil.
How to identify the right engine for your BMW Z3 and Z4
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 Z3 and Z4 engine prices
We currently hold 76 BMW Z3 and Z4 engine engines. The cheapest is 1.311,00 €, the most expensive 13.549,00 €, and half of them cost less than 7.639,00 €.
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 Z3 and Z4 engine prices by model year
| Model years | Units | From | Median | To |
|---|---|---|---|---|
| 1995–1999 | 1 | 1.339,00 € | 1.339,00 € | 1.339,00 € |
| 2000–2004 | 32 | 4.423,00 € | 8.030,00 € | 9.678,00 € |
| 2005–2009 | 29 | 1.670,00 € | 7.876,00 € | 9.544,00 € |
| 2010–2014 | 1 | 3.524,00 € | 3.524,00 € | 3.524,00 € |
| 2015–2019 | 2 | 2.523,00 € | 3.670,00 € | 3.670,00 € |
| 2020–2024 | 1 | 4.928,00 € | 4.928,00 € | 4.928,00 € |
Engines from 1995–1999 have a median of 1.339,00 €, while units from 2020–2024 sit at 4.928,00 €. Newer engines usually cost more because they come from younger donor cars with lower mileage and later updates.
BMW Z3 and Z4 engine prices by mileage
| Donor mileage | Units | From | Median |
|---|---|---|---|
| under 50,000 km | 9 | 6.369,00 € | 7.261,00 € |
| 50,000 to 100,000 km | 14 | 1.670,00 € | 7.876,00 € |
| 100,000 to 150,000 km | 19 | 6.544,00 € | 7.998,00 € |
| over 150,000 km | 18 | 2.382,00 € | 8.248,00 € |
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.
| Engine family | Units in stock | From | Median |
|---|---|---|---|
| M54 | 5 | 1.670,00 € | 2.217,00 € |
| S54 | 59 | 2.915,00 € | 8.033,00 € |
| N54 | 4 | 2.382,00 € | 3.524,00 € |
| B58 | 4 | 3.606,00 € | 4.928,00 € |
| M52 | 3 | 1.311,00 € | 1.339,00 € |
| M42 and M44 | 1 | 1.381,00 € | 1.381,00 € |
BMW Z3 and Z4 engines in stock now
Here is a selection of BMW Z3 and Z4 engine engines currently on our shelves, photographed in the yard. Click any of them for the full photographs, mileage and specification.
BMW E85 Z4 M S54B32 Engine 2006, 36,000 km8.153,00 €
BMW E86 Z4 M Coupe S54B32 Engine 2006, 78,100 km7.498,00 €
BMW E85 Z4 M S54B32 Engine 2003, 117,900 km6.743,00 €
BMW E85 Z4 M S54B32 Engine 2004, 109,900 km7.639,00 €BMW E85 Z4 M S54B32 Engine 2004, 103,000 km7.414,00 €
BMW E86 Z4 M Coupe S54B32 Engine 2002, 34,800 km9.234,00 €
BMW Z3 E36 M52B28 Engine 19981.339,00 €
BMW E86 Z4 M Coupe S54B32 Engine 2004, 197,900 km8.754,00 €
BMW E86 Z4 M Coupe S54B32 Engine 2007, 112,300 km8.137,00 €
BMW E86 Z4 M Coupe S54B32 Engine 2000, 96,000 km7.427,00 €
BMW E85 Z4 M S54B32 Engine 2005, 77,700 km7.810,00 €BMW E86 Z4 M Coupe S54B32 Engine 2005, 114,800 km7.313,00 €BMW E85 Z4 M S54B32 Engine 2006, 36,000 km — 8.153,00 €, reduced from 9.050,00 €. It comes from a 2006 donor car with 36,000 km, and 14 units are available. The listing shows every side of the engine and the fitted parts.
BMW E86 Z4 M Coupe S54B32 Engine 2006, 78,100 km — 7.498,00 €, reduced from 8.200,00 €. It comes from a 2006 donor car with 78,100 km, and 16 units are available. The listing shows every side of the engine and the fitted parts.
BMW E85 Z4 M S54B32 Engine 2003, 117,900 km — 6.743,00 €, reduced from 7.900,00 €. It comes from a 2003 donor car with 117,900 km, and 30 units are available. Ask the desk for compression figures or extra photographs before you order.
BMW E85 Z4 M S54B32 Engine 2004, 109,900 km — 7.639,00 €, reduced from 8.600,00 €. It comes from a 2004 donor car with 109,900 km, and 25 units are available. We can confirm fitment against your VIN the same day.
BMW E85 Z4 M S54B32 Engine 2004, 103,000 km — 7.414,00 €, reduced from 8.500,00 €. It comes from a 2004 donor car with 103,000 km, and 18 units are available. The listing shows every side of the engine and the fitted parts.
BMW E86 Z4 M Coupe S54B32 Engine 2002, 34,800 km — 9.234,00 €, reduced from 9.800,00 €. It comes from a 2002 donor car with 34,800 km, and 15 units are available. The listing shows every side of the engine and the fitted parts.
BMW Z3 E36 M52B28 Engine 1998 — 1.339,00 €, reduced from 2.000,00 €. It comes from a 1998 donor car, and 30 units are available. The listing shows every side of the engine and the fitted parts.
BMW E86 Z4 M Coupe S54B32 Engine 2004, 197,900 km — 8.754,00 €, reduced from 9.550,00 €. It comes from a 2004 donor car with 197,900 km, and 20 units are available. The listing shows every side of the engine and the fitted parts.
BMW E86 Z4 M Coupe S54B32 Engine 2007, 112,300 km — 8.137,00 €, reduced from 8.950,00 €. It comes from a 2007 donor car with 112,300 km, and 15 units are available. The listing shows every side of the engine and the fitted parts.
BMW E86 Z4 M Coupe S54B32 Engine 2000, 96,000 km — 7.427,00 €, reduced from 8.450,00 €. It comes from a 2000 donor car with 96,000 km, and 21 units are available. Ask the desk for compression figures or extra photographs before you order.
BMW E85 Z4 M S54B32 Engine 2005, 77,700 km — 7.810,00 €, reduced from 8.700,00 €. It comes from a 2005 donor car with 77,700 km, and 12 units are available. Ask the desk for compression figures or extra photographs before you order.
BMW E86 Z4 M Coupe S54B32 Engine 2005, 114,800 km — 7.313,00 €, reduced from 8.500,00 €. It comes from a 2005 donor car with 114,800 km, and 13 units are available. The listing shows every side of the engine and the fitted parts.
Buying checklist for a BMW Z3 and Z4 engine
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Bore coating. Early engines with Nikasil bores can be damaged by high-sulphur fuel. A compression or leak-down test is the only reliable check; units with Alusil or iron bores are not affected.
- Bearing and valve clearance history. M engines are built to tighter tolerances. Ask for the last rod bearing replacement and valve clearance check, and consider an oil analysis if the engine can be run.
- Originality and numbers. For collectible cars, the engine number and correct ancillaries add value. Photograph the stamp and keep it with the car's documents.
- Plastic cooling parts. Expansion tanks, thermostat housings and water pump impellers made of plastic crack with age. Plan to replace them when the engine is fitted.
- 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.
Fitting an engine to your BMW Z3 and Z4
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Reset VANOS adaptations. Clear the VANOS adaptations so the ECU learns the camshaft positions of the new engine.
- Teach the Valvetronic limit stops. Run the Valvetronic learning routine so the ECU knows the eccentric shaft limits.
- 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.
- 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 Z3 and Z4
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.
| Symptom | Likely cause |
|---|---|
| Knocking from the bottom of the engine | A deep knock that rises with engine speed usually means worn rod or main bearings. |
| 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. |
| White smoke that smells sweet | Coolant burning in the cylinders, from a head gasket, a cracked head or, on diesels, a leaking EGR cooler. |
| Blue smoke | Oil burning in the cylinders. |
| Rough idle or misfire | Ignition coils, spark plugs, injectors and vacuum leaks are the usual causes. |
| Loss of power | Start with the simple things: air filter, boost leaks on turbo engines, fuel pressure and fault codes. |
| Rattle for a few seconds after a cold start | The classic sign of a weak timing chain tensioner or stretched chain. |
| 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. |
| Poor low-down torque and uneven idle | VANOS seals or solenoids. |
| Limp mode with a Valvetronic fault | The Valvetronic motor, its eccentric shaft sensor or the wiring. |
| 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. |
| Hard starting when warm and low compression | On engines with Nikasil bores, the bore coating may be damaged. |
| Oil pressure warning or bearing noise at high revs | On M engines, a warning at high revs can be the first sign of bearing wear. |
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.
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.
Hard starting when warm and low compression. On engines with Nikasil bores, the bore coating may be damaged. A leak-down test confirms it.
Oil pressure warning or bearing noise at high revs. On M engines, a warning at high revs can be the first sign of bearing wear. Check the oil level and stop driving hard until it is diagnosed.
Repair or replace the engine in your BMW Z3 and Z4?
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.
M engines are expensive to rebuild because parts are costly and specialist labour is needed. A used M engine with documented bearings is often the better value for road cars.
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
Every BMW Z3 and Z4 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.
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 Z3 and Z4 engines from Hamburg to customers across Europe and beyond. Typical door-to-door times and customs status:
| Country | Typical delivery | Customs and VAT |
|---|---|---|
| Germany | 2–4 working days | No customs; German VAT on the invoice |
| Netherlands | 3–5 working days | EU delivery, no customs |
| Belgium | 3–5 working days | EU delivery, no customs |
| Austria | 3–5 working days | EU delivery, no customs |
| Denmark | 3–5 working days | EU delivery, no customs |
| Poland | 3–6 working days | EU delivery, no customs |
| Czech Republic | 3–6 working days | EU delivery, no customs |
| France | 4–7 working days | EU delivery, no customs |
| Italy | 5–8 working days | EU delivery, no customs |
| Spain | 5–8 working days | EU delivery, no customs |
| Portugal | 6–9 working days | EU delivery, no customs |
| Sweden | 5–8 working days | EU delivery, no customs |
| Norway | 6–10 working days | Export; import VAT and duty in Norway |
| Switzerland | 5–8 working days | Export; import VAT and duty in Switzerland |
| United Kingdom | 5–10 working days | Export; UK import VAT and duty on arrival |
| Ireland | 6–10 working days | EU delivery, no customs |
| United States | Quoted per order | Export; US import duties apply |
| United Arab Emirates | Quoted per order | Export; UAE import duties apply |
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 Z3 and Z4 engines
Will the M50B25 engine fit my BMW Z3 2.5?
Yes, if your BMW Z3 2.5 was built with the M50B25. BMW used this 2.5 liter (2,494 cc) petrol engine with 141 kW (192 HP) in the Z3 2.5 from about 1990 to 1995.
In our records the M50B25 is the engine for the Z3 2.5, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your Z3 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 M50 Engines · Search M50B25 in the shop
How much is a replacement M50B25 engine for a BMW Z3 2.5?
A used M50B25 for the BMW Z3 2.5 costs from about 1.650 € to 2.700 € 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 M50B25 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 M50 Engines · Search M50B25 in the shop
Will the M52B28 engine fit my BMW Z3 2.8?
Yes, if your BMW Z3 2.8 was built with the M52B28. BMW used this 2.8 liter (2,793 cc) petrol engine with 142 kW (193 HP) in the Z3 2.8 from about 1995 to 2000.
In our records the M52B28 is the engine for the Z3 2.8, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your Z3 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 M52 Engines · Search M52B28 in the shop
How much is a replacement M52B28 engine for a BMW Z3 2.8?
A used M52B28 for the BMW Z3 2.8 costs from about 1.500 € to 2.450 € 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 M52B28 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 M52 Engines · Search M52B28 in the shop
Will the M54B30 engine fit my BMW E85 Z4 3.0i?
Yes, if your BMW E85 Z4 3.0i was built with the M54B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 170 kW (231 HP) in the E85 Z4 3.0i from about 2000 to 2006.
In our records the M54B30 is the engine for the E85 Z4 3.0i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E85 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 M54 Engines · Search M54B30 in the shop
How much is a replacement M54B30 engine for a BMW E85 Z4 3.0i?
A used M54B30 for the BMW E85 Z4 3.0i costs from about 1.650 € to 2.700 € 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 M54B30 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 M54 Engines · Search M54B30 in the shop
Will the M54B25 engine fit my BMW E85 Z4 2.5i?
Yes, if your BMW E85 Z4 2.5i was built with the M54B25. BMW used this 2.5 liter (2,494 cc) petrol engine with 141 kW (192 HP) in the E85 Z4 2.5i from about 2000 to 2006.
In our records the M54B25 is the engine for the E85 Z4 2.5i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E85 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 M54 Engines · Search M54B25 in the shop
How much is a replacement M54B25 engine for a BMW E85 Z4 2.5i?
A used M54B25 for the BMW E85 Z4 2.5i costs from about 1.300 € to 2.200 € 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 M54B25 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 M54 Engines · Search M54B25 in the shop
Will the N52B30 engine fit my BMW E85 Z4 3.0si?
Yes, if your BMW E85 Z4 3.0si was built with the N52B30. BMW used this 3.0 liter (2,996 cc) petrol engine with 190 kW (258 HP) in the E85 Z4 3.0si from about 2005 to 2011.
In our records the N52B30 is the engine for the E85 Z4 3.0si, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E85 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 N52 Engines · Search N52B30 in the shop
How much is a replacement N52B30 engine for a BMW E85 Z4 3.0si?
A used N52B30 for the BMW E85 Z4 3.0si costs from about 1.800 € to 2.950 € 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 N52B30 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 N52 Engines · Search N52B30 in the shop
Will the N54B30 engine fit my BMW E89 Z4 sDrive35i?
Yes, if your BMW E89 Z4 sDrive35i was built with the N54B30. BMW used this 3.0 liter (2,979 cc) petrol engine with 225 kW (306 HP) in the E89 Z4 sDrive35i from about 2006 to 2010.
In our records the N54B30 is the engine for the E89 Z4 sDrive35i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E89 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 N54 Engines · Search N54B30 in the shop
How much is a replacement N54B30 engine for a BMW E89 Z4 sDrive35i?
A used N54B30 for the BMW E89 Z4 sDrive35i costs from about 3.000 € to 4.700 € 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 N54B30 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 N54 Engines · Search N54B30 in the shop
Will the N20B20 engine fit my BMW E89 Z4 sDrive28i?
Yes, if your BMW E89 Z4 sDrive28i was built with the N20B20. BMW used this 2.0 liter (1,997 cc) petrol engine with 180 kW (245 HP) in the E89 Z4 sDrive28i from about 2011 to 2017.
In our records the N20B20 is the engine for the E89 Z4 sDrive28i, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E89 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 N20 Engines · Search N20B20 in the shop
How much is a replacement N20B20 engine for a BMW E89 Z4 sDrive28i?
A used N20B20 for the BMW E89 Z4 sDrive28i costs from about 2.000 € to 3.200 € 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 N20B20 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 N20 Engines · Search N20B20 in the shop
Will the S52B32 engine fit my BMW Z3 M US?
Yes, if your BMW Z3 M US was built with the S52B32. BMW used this 3.2 liter (3,152 cc) petrol engine with 179 kW (240 HP) in the Z3 M US from about 1996 to 1999.
In our records the S52B32 is the engine for the Z3 M US, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your Z3 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 S52 Engines · Search S52B32 in the shop
How much is a replacement S52B32 engine for a BMW Z3 M US?
A used S52B32 for the BMW Z3 M US costs from about 3.850 € to 5.950 € 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 S52B32 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 S52 Engines · Search S52B32 in the shop
Will the S54B32 engine fit my BMW E85 Z4 M?
Yes, if your BMW E85 Z4 M was built with the S54B32. BMW used this 3.2 liter (3,246 cc) petrol engine with 252 kW (343 HP) in the E85 Z4 M from about 2000 to 2008.
In our records the S54B32 is the engine for the E85 Z4 M, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E85 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 S54 Engines · Search S54B32 in the shop
How much is a replacement S54B32 engine for a BMW E85 Z4 M?
A used S54B32 for the BMW E85 Z4 M costs from about 6.350 € to 9.700 € 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 S54B32 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 S54 Engines · Search S54B32 in the shop
Will the S54B32 engine fit my BMW E86 Z4 M Coupe?
Yes, if your BMW E86 Z4 M Coupe was built with the S54B32. BMW used this 3.2 liter (3,246 cc) petrol engine with 252 kW (343 HP) in the E86 Z4 M Coupe from about 2000 to 2008.
In our records the S54B32 is the engine for the E86 Z4 M Coupe, which makes the match simple. Still, check the code on your old engine or send us your VIN.
Also tell us if your E86 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 S54 Engines · Search S54B32 in the shop
How much is a replacement S54B32 engine for a BMW E86 Z4 M Coupe?
A used S54B32 for the BMW E86 Z4 M Coupe costs from about 6.350 € to 9.700 € 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 S54B32 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 S54 Engines · Search S54B32 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.
- Piezo injector — A fast-acting injector that uses a piezoelectric crystal. It allows precise fuel delivery but is sensitive to fuel quality.
- Wastegate — A valve that lets exhaust gas bypass the turbine to control boost pressure. Worn wastegates rattle and can cause boost faults.
- Nikasil — A nickel-silicon carbide coating used on the cylinder bores of some BMW engines in the 1990s. It was damaged by high-sulphur fuel.
- 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.
- Rod bearings — The bearings between the connecting rods and the crankshaft. On several M engines they wear and are replaced preventively.
- ITB — Individual throttle bodies, one per cylinder, used on most naturally aspirated M engines for sharp response.
- 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.
- 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 BMW Z3 and Z4 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 Z3 and Z4 engine in stock, or ask the Hamburg desk to check your VIN.
Model-by-model engine guides
- BMW Z4 3.0 (E85) engine: which one, problems and replacement
- BMW M (Z3) engine: which one, problems and replacement
- BMW Z4 M (E85 and E86) engine: which one, problems and replacement
- BMW Z4 2.5si (E85) engine: which one, problems and replacement
- BMW Z4 30i (E89) engine: which one, problems and replacement
- BMW Z4 35i (E89) engine: which one, problems and replacement
- BMW Z4 M40i (G29) engine: which one, problems and replacement
