2004 BMW 3 Series 325i M54B25 (E46)
E46 / Sedan/Coupe/Wagon/Convertible / Global (with regional engine variations)
M54B25Exakter Jahres-/Varianten-DatensatzGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Rear subframe bushing wear
- Cooling system expansion tank cracking
- VANOS solenoid failure
First checks
- Oil leaks around valve cover gasket
- Condition of cooling hoses and water pump
- Suspension components for wear
Vor dem Teiletausch
- 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
- BMW 325i E46 production for 2004 overlaps globally with minor market-specific variations in transmission and emissions equipment.
- Engine oil capacity includes filter change; synthetic oil recommended.