2008 Audi RS4 Service and Repair Manual

This manual for the 2008 Audi RS4 is built around this exact year, engine and trim, so the torque values and diagnostic steps you're following are the ones Audi specified for your car, down to the 4.2L V8 (engine code BNS) under the hood.

Engines covered

• 4.2L V8 — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door convertible
• 4-door sedan

Trims covered

• Base
• Cabriolet

Known issues on the 2008 RS4. Owners have filed 3 complaints for the year. The factory diagnostic and repair procedures for this V8 and drivetrain are here.

Whether you're servicing the BNS V8 or working through a full inspection on the Cabriolet or Sedan, it keeps every step matched to your specific 2008 RS4.