2004 BMW 5 Series M54B25 (E39)
E39 / Sedan / Global (mainly Europe, North America, Asia)
M54B25Registro exacto de año/versiónGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Cooling system component failure (water pump, thermostat)
- Electronic throttle body issues
- Oil leaks from valve cover gasket and oil filter housing
First checks
- Inspect cooling system for leaks and functionality
- Check condition and function of electronic throttle
- Examine oil seals for leaks, especially valve cover gasket
Antes de cambiar piezas
- 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
- 525i 2004 model in the US used the M54B25 engine; in some markets displacement and power may vary slightly.
- Automatic transmissions may differ by regional supplier; manual transmissions less common in North America.