2005 BMW 325Ci M54B25 (E46)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Rear subframe bushings wear causing clunking
• Cooling system components failure (water pump, thermostat)
• Oil leaks from valve cover gasket

First checks

• Inspect cooling system for leaks
• Check VANOS operation for smoothness
• Verify condition of suspension bushings

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

• The listed specs apply generally across European, North American, and Australian markets with minor variations in emissions equipment.
• Produced as part of BMW E46 3 Series coupe lineup until mid-2006.