2021 BMW 3 Series 330i B48B20M0 (G20)
G20 / Sedan / Global / with market-specific engine tuning and equipment variations
B48B20M0Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- High pressure fuel pump wear in early B48 engines
- Carbon buildup on intake valves
First checks
- Inspect turbocharger operation and boost pressure
- Verify valve cover oil leaks especially on high mileage units
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Power and torque figures vary by market due to emissions and tuning differences.
- Oil capacity includes filter change fill volume.