BMW B48
vs B58
B48 79–82/100 · B58 87–91/100
On our scores the BMW B58 is the safer buy: 87–91/100 against 79–82/100 for the BMW B48.
Same car, either engine
The F20 was sold with both.
82/100
13 confirmed issues
Best-known problemWater pump failure · from 112k km · €300–900
87/100
12 confirmed issues
Best-known problemOil pump wear / sludge buildup · from 85k km · €1,500–4,000
The F30 was sold with both.
79/100
12 confirmed issues
Best-known problemOil filter housing coolant leak · from 80k km · €700–1,800
87/100
12 confirmed issues
Best-known problemHigh-pressure fuel pump failure · from 161k km · €800–2,000
Version by version
BMW B48
82/100
13 confirmed issues
Best-known problemWater pump failure · from 112k km · €300–900
79/100
12 confirmed issues
Best-known problemOil filter housing coolant leak · from 80k km · €700–1,800
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
- Water pump failure
- Piston ringland failure
- Head gasket failure
- Wastegate / boost actuator failure
- High-pressure fuel pump failure
- Oil leak from seals or gaskets
- Fuel injector failure
- Variable valve timing solenoid/actuator failure
- Intercooler failure or leak
- Oil pump wear / sludge buildup
Only on the BMW B48
- Timing chain stretch / guide wear
- Thermostat / temperature sensor failure
- Excessive oil consumption
- ECU fault or wiring issue
- Oil filter housing coolant leak
Only on the BMW B58
- Oil pump failure
- Rod bearing failure
- Dual-mass flywheel / clutch wear
- Engine sensor failure