2001 BMW 5 Series 525i M54B25/M52TUB25 (early 2001, some markets) (E39)
E39 / Sedan / Global (primarily Europe, North America, and select other markets; specifications vary slightly by region)
M54B25M52TUB25 (early 2001, some markets)Exakter Jahres-/Varianten-DatensatzSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Cooling system plastic parts failure
- Valve cover gasket oil leaks
- Rear subframe bushings wear
First checks
- Inspect cooling system for plastic component cracks
- Oil leaks around valve cover and oil pan
- Suspension bushings and control arms condition
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
- The 2001 525i E39 transitioned mostly to M54 engine globally, but some early production or market-specific units retained M52TUB25 engines.
- Transmission and tire specifications vary somewhat by market and production date.