2011 BMW 335i N54B30/N55B30 (E90/E92/E93)
E90/E92/E93 / Sedan, Coupe, Convertible / Global (primarily North America, Europe, selected other markets)
N54B30N55B30Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- High-pressure fuel pump failures (N54)
- Turbocharger wastegate rattling (N54)
- Coolant leaks from water pump and thermostat housing
- Carbon buildup on intake valves (direct injection)
First checks
- Inspect high-pressure fuel pump and injectors
- Check turbocharger operation and wastegate
- Review engine oil level and condition frequently
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
- 2011 was a transition year from N54 (twin-turbo) to N55 (single twin-scroll turbo) engine in many markets, check specific market or VIN for engine variant
- Available body styles include sedan (E90), coupe (E92), and convertible (E93)
- Some markets received minor tuning or emission adaptations; verify exact engine and transmission for region