2022 BMW M440i B58B30M0/B58B30M1 (G22 (Coupe) / G23 (Convertible))

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Oil leaks from high pressure fuel pump seals reported in some early B58 engines
• Water pump or thermostat failure (infrequent)

First checks

• Cooling system integrity
• Oil level and condition
• Transmission fluid level and condition

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

• Engine variants and power outputs may slightly vary based on market and emissions regulations.
• Mild-hybrid 48V system integrated to improve fuel efficiency and throttle response.