2004 AUDI A8 BFM/ASB (4E)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Air suspension issues (if equipped)
• Timing chain tensioner wear (3.7L V8)
• Electrical system faults due to complex electronics

First checks

• Verify service history for timing chain and suspension maintenance
• Check for oil leaks around valve covers and undercarriage
• Inspect air suspension compressor if equipped

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

• Engine and equipment vary significantly by market; US models often lack diesel options.
• 2004 A8 represents mid-cycle refresh of the D3 generation started in 2002.