2008 AUDI S4 E8/EA855 (B7)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain tensioner wear potentially leading to rattle
• Carbon buildup on intake valves due to direct injection

First checks

• Inspect timing chain tensioner and guides
• Check ignition coils and spark plug condition

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

• The 2008 S4 is part of the B7 generation produced from 2005 to 2008 globally with minor market-specific variations.
• All markets use the 4.2L V8 naturally aspirated engine; however, manual transmission availability was limited mainly to Europe.
• Engine oil capacity stated includes filter replacement fill; oil type and service intervals can vary slightly with climate and usage.