2020 BMW 440i B58B30M0/N55B30M0 (limited markets/early 2020) (G22 (coupe), G23 (convertible))
G22 (coupe), G23 (convertible) / Coupe / Convertible / Global with regional engine tuning variations
B58B30M0N55B30M0 (limited markets/early 2020)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Potential electric water pump failure
- High-pressure fuel pump wear
- Vanos solenoid issues
First checks
- Check turbo wastegate actuator
- Inspect cooling system for leaks
- Monitor oil consumption rates
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
- The 440i replaced the 435i starting the 2017 model year and carried the B58 engine from 2017 onwards.
- In some markets, early 2020 production may still have the outgoing N55 engine; confirm exact engine per VIN.
- Oil and coolant capacities vary slightly based on right- or left-hand drive and market emissions equipment.