BMW N55
vs B58
N55 70/100 · B58 87–91/100
On our scores the BMW B58 is the safer buy: 87–91/100 against 70/100 for the BMW N55.
Same car, either engine
The F30 was sold with both.
70/100
17 confirmed issues
Best-known problemRod bearing failure · from 84k km · €2,500–8,000
87/100
12 confirmed issues
Best-known problemHigh-pressure fuel pump failure · from 161k km · €800–2,000
The F20 was sold with both.
70/100
19 confirmed issues
Best-known problemRod bearing failure · from 84k km · €2,500–8,000
87/100
12 confirmed issues
Best-known problemOil pump wear / sludge buildup · from 85k km · €1,500–4,000
Version by version
BMW N55
70/100
16 confirmed issues
Best-known problemRod bearing failure · from 97k km · €2,500–8,000
70/100
17 confirmed issues
Best-known problemRod bearing failure · from 84k km · €2,500–8,000
70/100
19 confirmed issues
Best-known problemRod bearing failure · from 84k km · €2,500–8,000
BMW B58
91/100
12 confirmed issues
Best-known problemOil pump failure · from 85k km · €1,500–4,000
87/100
12 confirmed issues
Best-known problemHigh-pressure fuel pump failure · from 161k km · €800–2,000
87/100
12 confirmed issues
Best-known problemOil pump wear / sludge buildup · from 85k km · €1,500–4,000
The problems they share
Reported on both
- Rod bearing failure
- High-pressure fuel pump failure
- Oil pump wear / sludge buildup
- Water pump failure
- Oil leak from seals or gaskets
- Head gasket failure
- Piston ringland failure
- Fuel injector failure
- Wastegate / boost actuator failure
- Dual-mass flywheel / clutch wear
- Variable valve timing solenoid/actuator failure
- Engine sensor failure
- Intercooler failure or leak
Only on the BMW N55
- Timing chain stretch / guide wear
- Excessive oil consumption
- Thermostat / temperature sensor failure
- Intake valve carbon buildup
- Turbocharger failure
- Oil filter housing gasket leak
- Cracked charge pipe
Only on the BMW B58
- Oil pump failure