2009 Audi A4 Service and Repair Manual

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Factory-Grade Data

2009 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
  • Base Sedan 4-Door
  • Sport Sedan 4-Door
  • Luxury Sedan 4-Door

Engines covered

  • 2.0L 1984CC 121Cu. In. l4 GAS DOHC Turbocharged
  • 1.8L 1798CC 110Cu. In. l4 GAS DOHC Turbocharged

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

2009 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

TSB #11032137

This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool

TSB #11022664

This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool

TSB #11021447

This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool

TSB #11016532

This bulletin provides informatin when the engine does not run smoothly at idling speeds.

TSB #11012483

This bulletin provides information in circumstances where there are noises/vibration from front of vehicle in dynamic mode.

TSB #11012476

This bulletin provides information when the MIL is on; DTCs for misfire, air/fuel ratio imbalance, or lean fuel system stored in the ECM P030000.

TSB #11011285

This TSB Provides information when parking assistance provides false warnings.

TSB #11011282

This bulletin provides information when speaker rattles, vibrations, or audio interference is noted.

Showing the 8 most recent of 774 technical service bulletins on file with NHTSA.

20240805Component: AIR BAGSCrash reported2 injured

The negligent driver yielded to the flow of traffic without stopping. When he collided with us, the airbags (exploded) deployed so strongly that they damaged the windshield and our bodies: face, neck,

20090528Component: AIR BAGS:FRONTALCrash reported1 injured

I HAD AN ACCIDENT IN MY AUDI A4 CONVERTIBLE AND THE DRIVER AIRBAG DID NOT DEPLOY. DUE TO SUN GLARE, I REAR-ENDED A MERCURY MOUNTAINEER WITH MY 2006 AUDI A4 CONVERTIBLE. I NEVER SAW HIS TAILLIGHTS

20190124Component: ENGINECrash reported

OIL CONSUMPTION I HAD THIS CAR SINCE 2012 AND FOUND OUT RECENTLY ABOUT OIL CONSUMPTION CLASS ACTION LAWSUIT THROUGH THE INTERNET, WHEN MY CAR STARTED CONSUMING COPIOUS AMOUNTS OF OIL. THE OWNER MAN

20160926Component: AIR BAGSCrash reported

TAKATA RECALL: I RECENTLY LEARNED THAT BOTH MY DRIVER SIDE AND PASSENGER SIDE TAKATA AIRBAGS WERE RECALLED ON MY 2009 AUDI A4. I HAVE CALLED AND VISITED TWO DEALERSHIPS IN PERSON AND MADE OVER 5 PHONE

20130220Component: VEHICLE SPEED CONTROLCrash reported

I WAS JUST PARKING THE CAR AND WAS ABOUT 5 MPH AND SUDDENLY CAR GOT ACCELERATED UNINTENTIONALLY TO HIGHER RPM AND HIT THE CURB AND ABOVE CEMENT WALL . EVEN APPLYING BRAKES HADN'T SLOWED DOWN THE VEHIC

Showing the 5 most serious of 150 complaints filed with NHTSA.

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