2004 Audi A6 Service and Repair Manual

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Covers all 2004 A6 trims — Base Sedan 4-Door, Confort Sedan 4-Door, Luxury Sedan 4-Door ·
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2004 Audi A6 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

  • Base Sedan 4-Door
  • Confort Sedan 4-Door
  • Luxury Sedan 4-Door

Engines covered

  • 3.0L 2976CC V6 GAS DOHC Naturally Aspirated
  • 3.0L 2950CC 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
NHTSA #04V13300018/03/2004Component: ELECTRICAL SYSTEM

ON CERTAIN PASSENGER VEHICLES, IF A DRIVER'S KNEES PUSH AGAINST THE KNEE BOLSTER (CRASH ELEMENT) LOCATED UNDER THE DASHBOARD, IT CAN CONTACT THE HEADLIGHT SWITCH WIRING HARNESS, AND AN ELECTRICAL SHOR

Consequence

A FIRE COULD ORIGINATE IN THE LEFT DASHBOARD AREA.

Remedy

DEALERS WILL INSTALL A PROTECTIVE COVERING ON THE KNEE BOLSTER (CRASH ELEMENT). IN ADDITION, THE WI

TSB #10253417

Audi Delivery Guidelines.

TSB #10253418

Audi Delivery Guidelines.

TSB #10243930

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

TSB #10228297

This Technical Service Bulletin (TSB) details the general process for carrying out a Software Version Management (SVM) software update for any TSB or Update.

TSB #10228302

High quality media files (video and sound) are now integrated into technical service bulletins on a case-by-case basis. Media files can now be viewed on any smartphone or tablet.

TSB #10228314

The use of contaminated gasoline or gasoline with a low content of deposit control additives may result in one or more conditions.

TSB #10226529

Vehicle lacks power or will not move after stop due to simultaneous depressing of the brake and accelerator pedals

TSB #10226530

ATF pan leaks

Showing the 8 most recent of 121 technical service bulletins on file with NHTSA.

20110120Component: AIR BAGSCrash reported1 injured

TL*THE CONTACT OWNS A 2004 AUDI A6 AVANT. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT HAD BEEN ILLUMINATING INTERMITTENTLY. THE DEALER STATED THAT THE CONTACT SHOULD NOT WORRY ABOUT THE LIGHT. WHIL

20110120Component: SERVICE BRAKES, HYDRAULICCrash reported1 injured

TL*THE CONTACT OWNS A 2004 AUDI A6 AVANT. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT HAD BEEN ILLUMINATING INTERMITTENTLY. THE DEALER STATED THAT THE CONTACT SHOULD NOT WORRY ABOUT THE LIGHT. WHIL

20110120Component: ENGINE AND ENGINE COOLINGCrash reported1 injured

TL*THE CONTACT OWNS A 2004 AUDI A6 AVANT. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT HAD BEEN ILLUMINATING INTERMITTENTLY. THE DEALER STATED THAT THE CONTACT SHOULD NOT WORRY ABOUT THE LIGHT. WHIL

20150608Component: ENGINEFire reported

TL* THE CONTACT OWNED A 2004 AUDI A6. WHILE DRIVING AT 20 MPH, SMOKE APPEARED FROM THE ENGINE COMPARTMENT AND THE VEHICLE CAUGHT FIRE. A POLICE REPORT WAS FILED AND THERE WERE NO INJURIES REPORTED. TH

20120522Component: ELECTRICAL SYSTEMFire reported

TL* THE CONTACT OWNS A 2004 AUDI A6. THE CONTACT STATED THAT WHILE DRIVING 65 MPH, THAT THERE WAS A FAILURE IN THE ELECTRIC HARNESS UNDER THE PASSENGER SEAT. THE CONTACT STATED THAT HE NOTICED A BURNI

Showing the 5 most serious of 44 complaints filed with NHTSA.

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