2007 BMW 525i N46B20 (E60)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• High-pressure fuel pump issues
• Electronic throttle valve faults
• Rear subframe bushing wear

First checks

• Inspect VANOS timing system
• Check for oil leaks around valve cover gasket
• Monitor cooling system for thermostat and water pump function

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 525i in 2007 was primarily offered in Europe and select markets; in the US, the 5-series lineup was similarly available but with some differences in engine and emissions specs.
• The N46 engine replaced the older M54 in European 525i models starting mid-2005, including 2007 models.