1999 Audi A6 C5 ABH/AAN (C5)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Oil leaks from camshaft seals
• Coolant leaks from water pump
• Timing chain tensioner wear in early V6 engines

First checks

• Inspect timing chain condition
• Check for oil leaks at valve covers and cam seals
• Verify DSG or automatic transmission fluid condition 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 availability varies by market; US market had more limited engine options.
• Avant (wagon) and quattro AWD versions were common in European markets but may differ in others.