2005 BMW M3 S54B32 (E46)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Rod bearing wear under aggressive use
• Throttle actuator motor failure
• SMG transmission solenoid wear (if equipped)

First checks

• Engine rod bearing condition check
• Throttle actuators calibration
• SMG pump and solenoid operation (if SMG equipped)

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 2005 M3 E46 is the last generation using the S54 naturally aspirated engine.
• Power figures vary slightly by market due to emissions and tuning regulations.