2002 BMW 330ci M54B30 (E46)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Cooling system leaks/failures
• DISA valve issues
• Rear subframe bushing wear

First checks

• Cooling system condition and pressure test
• Vanos actuator function
• Oil leaks from valve cover gasket

Avant de remplacer des pièces

• 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 and specs mostly consistent globally, minor market-specific emission setups exist
• Oil capacity includes filter change service fill; regular oil change recommended every 10,000 to 15,000 km