2003 Audi A4 Service and Repair Manual

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Factory-Grade Data

2003 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
  • Base Sedan 4-Door
  • Confort Sedan 4-Door
  • Vangard Sedan 4-Door
  • Cabrio Convertible 2-Door
  • Luxury Sedan 4-Door

Engines covered

  • 1.8L 1781CC l4 GAS DOHC Turbocharged
  • 3.0L 2976CC 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

2003 Audi A4 Recalls & Complaints

NHTSA #06V01700023/01/2006Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

ON CERTAIN VEHICLES PRODUCED FROM SEPTEMBER 2002 - MARCH 2003, EQUIPPED WITH 1.8L TURBO, 2.8L V6, OR 3.0L ENGINES, A CHANGE IN THE ELECTRICAL MOTOR COMPONENTS IN THE FUEL PUMP CAN LEAD TO AN INOPERATI

Consequence

IF FUEL FLOW TO THE ENGINE IS INTERRUPTED, THE VEHICLE COULD STALL WITHOUT WARNING AND THUS PRESENT

Remedy

DEALERS WILL INSTALL NEW FUEL PUMPS FREE OF CHARGE. THE RECALL BEGAN ON APRIL 10, 2006. OWNERS MAY

NHTSA #05V09600015/03/2005Component: EXTERIOR LIGHTING:HEADLIGHTS

ON CERTAIN PASSENGER VEHICLES, THERE IS A POSSIBILITY OF XENON HEADLAMP COATING DEGRADATION OVER TIME. THE LUMINOUS TRANSMITTANCE OF THE HEADLAMP MAY DECREASE OVER A PERIOD OF TIME.

Consequence

THIS CONDITION COULD AFFECT A DRIVER'S FIELD OF VIEW, INCREASING THE RISK OF A CRASH.

Remedy

DEALERS WILL REPLACE THE LEFT AND RIGHT XENON HEADLAMP REFLECTORS FREE OF CHARGE. THE RECALL BEGAN

TSB #10243930

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

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 #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 #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

TSB #10224976

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 #10224981

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.

Showing the 8 most recent of 163 technical service bulletins on file with NHTSA.

20160510Component: AIR BAGSCrash reported2 injured

TL* THE CONTACT OWNS A 2003 AUDI A4. THE CONTACT STATED THAT WHILE DRIVING AT LOW SPEEDS AND SWITCHING LANES, ANOTHER VEHICLE DRIVING AT HIGH SPEEDS CRASHED INTO THE REAR OF THE VEHICLE. THE OTHER VEH

20160506Component: AIR BAGSCrash reported2 injured

TAKATA RECALL I HAVE A 2003 AUDI A4 I WAS SIDESWIPED RECENTLY CAUSING SIGNIFICANT AMOUNT OF DRIVER SIDE DAMAGE WHICH ONE OF THE AIRBAGS DEPLOYED I'M SUFFERING FROM THE INJURY

20110127Component: VEHICLE SPEED CONTROLCrash reported2 injured

WHILE I WAS DRIVING MY VEHICLE, THE APPROACHING LIGHT TURNED YELLOW, THEN RED, AND THE VEHICLES IN FRONT OF ME STOPPED, I APPLIED THE BREAK ON MY VEHICLE, I HAD PLENTY OF DISTANCE BETWEEN ME AND THE O

20050901Component: AIR BAGSCrash reported2 injured

OUR BRAND NEW 2003 AUDI A4 WAS REAR-ENDED BY A FORD F-550 TRAVELING AT APPROX. 55 MPH. THE FORD F-550 DID NOT BRAKE BEFORE IMPACT AND HIT THE AUDI WITH SUCH FORCE THAT IT IMPACTED THE VEHICLE IMMEDIA

20050627Component: AIR BAGSCrash reported1 injured

MY AUDI A4 BROADSIDED A TOYATA AVALON (REAR PASSENGER SIDE). POLICE ESTIMATE IMPACT SPEED OF APPROX. 40 MPH. NO AIRBAGS DEPLOYED IN AUDI.

Showing the 5 most serious of 282 complaints filed with NHTSA.

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