2004 AUDI S4 AAN (8E)
8E / Sedan / Avant (wagon) / Global (Europe, North America, others with minor variations)
AANExact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Timing chain tensioner wear leading to potential engine noise or failure
- High-pressure fuel pump issues in some markets
- Carbon buildup on intake valves
First checks
- Inspect timing chain tensioner and guides for wear
- Check for oil leaks around valve cover and turbo seals
- Monitor boost pressure and fuel system for faults
Before replacing parts
- 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
- 2004 Audi S4 B6 used the 2.7L biturbo V6 engine in most global markets with minor tuning differences.
- Transmission offerings varied slightly by market: manual more common in Europe, automatic more common in North America.