2008 Audi A4 Service and Repair Manual

This 2008 Audi A4 factory service and repair manual is built around the exact year, engine and trim of your car, including the 2.0L turbocharged four-cylinder (engine code BWT) and the 3.2L V6 (engine code BKH), so the specifications and repair sequences inside are the ones Audi wrote for those powerplants rather than a generic A4 procedure.

Engines covered

• 2.0L inline-four (121 cu in) — DOHC, turbocharged, gasoline
• 1.8L inline-four — DOHC, turbocharged, gasoline
• 3.2L V6 — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door convertible
• 4-door sedan

Trims covered

• Base
• Cabrio Elite
• Cabrio S Line
• Cabriolet
• Luxury
• S Line
• Trendy
• Trendy Plus

Known issues on the 2008 A4. Four recalls are on federal record for this model year, and all four trace back to the passenger frontal air bag system. Three separate recalls cover the passenger frontal air bag inflator module, which can rupture or explode during deployment and send metal fragments into the vehicle occupants, risking serious injury or death. A fourth recall covers the air bag control unit itself, which can corrode and fail so that the air bags do not deploy in a crash at all. Owners have filed 191 complaints for the year. The factory diagnostic and repair procedures behind the air bag system, and every other system on the car, are here.

Whether you're inspecting the air bag control unit, working through a routine service interval, or chasing down a turbo boost concern on the 2.0L, it keeps you on the OEM procedure and the correct specification for your specific 2008 A4.