2008 Audi A4 Service and Repair Manual

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Factory-Grade Data

2008 Audi A4 service and repair manual a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What's included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • Cabriolet Convertible 2-Door
  • Trendy Sedan 4-Door
  • Trendy Plus Sedan 4-Door
  • S Line Sedan 4-Door
  • Base Sedan 4-Door
  • Cabrio S Line Convertible 2-Door
  • Luxury Sedan 4-Door
  • Cabrio Elite Convertible 2-Door

Engines covered

  • 2.0L 1984CC 121Cu. In. l4 GAS DOHC Turbocharged
  • 1.8L 1781CC l4 GAS DOHC Turbocharged
  • 3.2L 3123CC V6 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2008 Audi A4 Recalls & Complaints

NHTSA #16V37600027/05/2016Component: AIR BAGS

Volkswagen Group of America, Inc. (VW) is recalling certain model year 2008-2009 Audi A4, A5, and Q5 vehicles. In the affected vehicles, the air bag control units may corrode and fail.

Consequence

If the air bag control unit fails, the air bags may not deploy in the event of a crash, increasing t

Remedy

Audi will notify owners, and dealers will replace the air bag control unit, free of charge. The rec

NHTSA #17V03200011/01/2017Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2009 Audi A4 Cabriolet, S4 Cabriolet, A6 Avant, A6 Sedan and S6 Sedan vehicles originally sold, or ever registered, in Arizona, Arka

Consequence

An inflator rupture may result in metal fragments striking the vehicle occupants resulting in seriou

Remedy

Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of ch

NHTSA #16V38200001/06/2016Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2004-2008 Audi A4, and 2005-2011 Audi A6 vehicles originally sold, or ever registered, in Alabama, California, Florida, G

Consequence

An inflator rupture may result in metal fragments striking the vehicle occupants resulting in seriou

Remedy

Audi will notify owners, and dealers will replace the passenger frontal air bag inflator, free of ch

TSB #10250322

This bulletin provides information pertaining to MMI Navigation database concerns.

TSB #10248208

This bulletin provides information when the parking assistance provides false warnings.

TSB #10246152

This bulletin provides general information about the outside air temperature reading.

TSB #10245285

This bulletin provides information on the VAS 611 015 PICO-NVH tool for professional noise analysis.

TSB #10244595

This bulletin provides information pertaining to when there are foreign objects inside of a headlight or taillight.

TSB #10244517

This bulletin provides damage assessment guidelines for textile seat covers.

TSB #10243930

This bulletin provides information on the additional reporting requirements for safety related inquiries.

TSB #10244320

This bulletin provides information for when unauthorized/unjustified DTC memory entries are captured in ODIS test Plans (Ghost faults).

Showing the 8 most recent of 452 technical service bulletins on file with NHTSA.

20260420Component: AIR BAGSCrash reported1 injured

The contact owns a 2008 Audi A4. The contact received an unknown recall notice related to the air bags. The contact scheduled an appointment at a dealer and had the recall serviced. The contact then s

20170113Component: AIR BAGSCrash reported1 injured

TL* TAKATA RECALL. THE CONTACT OWNS A 2008 AUDI A4. THE CONTACT'S VEHICLE WAS REAR ENDED AND THE AIR BAGS FAILED TO DEPLOY. THE DRIVER SUSTAINED BLUNT HEAD AND CHEST TRAUMA THAT REQUIRED MEDICAL ATTE

20160426Component: AIR BAGSCrash reported1 injured

TL* TAKATA RECALL. THE CONTACT OWNED A 2008 AUDI A4. WHILE DRIVING AT AN UNKNOWN SPEED, THE CONTACT'S VEHICLE REAR ENDED ANOTHER VEHICLE. THE CONTACT WAS NOT ABLE TO STOP THE VEHICLE IN TIME TO AVOID

20141203Component: AIR BAGSCrash reported1 injured

I ACCIDENTALLY DROVE OVER THE RUMBLE STRIP ON THE SIDE OF THE HIGHWAY. THE RIGHT REAR TIRE BLEW AND THE CAR FLIPPED OVER SIX TIMES AND CHANGED DIRECTION. EVERY SIDE AIR BAG INFLATED EXCEPTED FOR MY

20141203Component: STRUCTURE:BODYCrash reported1 injured

I ACCIDENTALLY DROVE OVER THE RUMBLE STRIP ON THE SIDE OF THE HIGHWAY. THE RIGHT REAR TIRE BLEW AND THE CAR FLIPPED OVER SIX TIMES AND CHANGED DIRECTION. EVERY SIDE AIR BAG INFLATED EXCEPTED FOR MY

Showing the 5 most serious of 204 complaints filed with NHTSA.

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