2019 Audi A6 Quattro Service and Repair Manual

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Covers all 2019 A6 Quattro trims — Prestige Sedan 4-Door, Premium Sedan 4-Door, S Line Sedan 4-Door +4 more ·
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2019 Audi A6 Quattro 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.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Prestige Sedan 4-Door
  • Premium Sedan 4-Door
  • S Line Sedan 4-Door
  • Progressiv Sedan 4-Door
  • Premium Plus Sedan 4-Door
  • Elite Sedan 4-Door
  • Technik Sedan 4-Door

Engines covered

  • 3.0L 2995CC V6 MILD HYBRID EV-GAS (MHEV) DOHC Turbocharged
  • 2.0L 1984CC 121Cu. In. l4 MILD HYBRID EV-GAS (MHEV) 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
NHTSA #21V15900010/03/2021Component: AIR BAGS

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi RS6 Avant, RS7, 2020-2021 A6 Allroad, S6 Sedan, S7, 2019-2021 A6 Sedan, and A7 vehicles. The score line on the passenger air bag may not have been manufactured correctly.

Consequence

An incorrectly manufactured air bag may not deploy properly, and could also eject plastic debris into the passenger compartment, increasing the risk of injury during a crash.

Remedy

Audi will notify owners, and dealers will inspect the passenger air bag score line, and repair it as necessary, free of charge. The recall begin March 26, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 70i2.

NHTSA #20V15300019/03/2020Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2019-2020 Audi A6 vehicles equipped with mild-hybrid technology and 2.0TFSI engines. Moisture may enter the starter generator and cause an electrical short circuit.

Consequence

A short circuit in the starter generator increases the risk of a fire.

Remedy

Volkswagen will notify owners, and dealers will replace the starter generator, free of charge. The recall began by May 22, 2020. Owners may contact Volkswagen customer service at 1-800-893-5298. Volkswagen's number for this recall is 27H2.

NHTSA #22V15500014/03/2022Component: ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 RS6 Avant and RS7, 2020-2022 A6 Allroad, S6 Sedan, and S7, and 2019-2022 A6 Sedan and A7 vehicles. The fuel level sender may stick, causing an inaccurate fuel level reading to be displayed on the instrument cluster.

Consequence

An inaccurate fuel reading may cause an engine stall due to lack of fuel, increasing the risk of a crash.

Remedy

Dealers will install a new sensor in the tank, free of charge. Owner notification letters were mailed February 17, 2023. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 20DN.

NHTSA #22V86100021/11/2022Component: ELECTRICAL SYSTEM

Volkswagen Group of America, Inc. (Audi) is recalling certain 2020-2022 Audi S7, S6 Sedan, A6 Allroad, 2021-2022 RS7, RS6 Avant, 2019-2022 A7, and A6 Sedan vehicles. Liquid spilled in the rear seat may penetrate and cause the gateway control module to shut down.

Consequence

A gateway control module shutdown will suddenly reduce engine power, increasing the risk of a crash.

Remedy

Dealers will install a protective cover, free of charge. Owner notification letters are expected to be mailed January 20, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 90V2.

NHTSA #23V60100025/08/2023Component: SERVICE BRAKES, HYDRAULIC:FLUID

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi S7, S6 Sedan, RS7, RS6 Avant, A6 Allroad, 2019-2021 A7, and A6 Sedan vehicles. An incorrectly labeled brake fluid cap may have been installed, which can result in the use of the wrong type of brake fluid.

Consequence

Incorrect brake fluid can reduce braking ability and increase the risk of a crash.

Remedy

Dealers will inspect the brake fluid reservoir cap and, if necessary, replace it, free of charge. Owner notification letters are expected to be mailed October 17, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 47T9.

NHTSA #25V90000019/12/2025Component: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2026 vehicles. Please see the recall report for a complete list of models. A software error may prevent the rearview camera image from displaying as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Consequence

A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.

Remedy

Dealers will update the software, free of charge. Owner notification letters were mailed January 14, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TV. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.

NHTSA #26V12500004/03/2026Component: LANE DEPARTURE:SOFTWARE

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019 Audi Q8, Audi A7, and Audi A6 vehicles previously repaired under recall number 25V900. Due to a software error, the lane departure warning system may be deactivated.

Consequence

The driver may be unaware that the lane departure warning system is deactivated and rely on a system that is not functional, increasing the risk of a crash.

Remedy

Dealers will update the software, free of charge. Owner notification letters were mailed March 13, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TW. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 6, 2026.

TSB #11033492

This bulletin provides informaiotn when the starter battery is discharged or defective.

TSB #11033477

This bulletin provides repair instructions for the overhead view camera; gen 3.

TSB #11033475

The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Adde

TSB #11033474

This bulletin provides information when there are noises after selecting a ear while idling and the vehicle is stationary, or while driving.

TSB #11033469

This bulletin provides informaiton when the windscreen/rear window washer pump is not working (B126101, B126113).

TSB #11033465

This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra.

TSB #11033457

This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the issue: The ODIS Audi Brand update 2.41.1 is setting a ODS5003E

TSB #11032194

This bulletin is informational and contains information on the various warning lamps that may appear.

Showing the 8 most recent of 1191 technical service bulletins on file with NHTSA.

09/05/20Component: AIR BAGS,STRUCTURE,ENGINECrash reported1 injured

MY 6 WEEK OLD AUDI A6 WAS TOTALED WHEN I WAS DRIVING 20 MPH! I LOOKED DOWN TO CHECK MY ODOMETER, AND WITHIN THAT TIME, NO WARNING SIGNALS , BRAKES, ETC. ALERTED ME! THIS CAR HAD ALL THE BELLS AND WHISTLES! THAT MORNING I WAS ON A TREE LINED DRIVE TO THE TENNIS COURTS! NO ALERTS! HIT A TREE AND ALL AIR BAGS DEPLOYED! TREMENDOUS IMPACT FOR 20 MPH! I WAS ALL BANGED UP, CAR TOTALED! I AM STILL IN DISBELIEF...THOUGHT I HAD THE WORLD'S SAFEST CAR. HAS ANYONE ELSE HAD A PROBLEM???

03/09/20Component: ELECTRICAL SYSTEM,ENGINECrash reported1 injured

STOP ENGINE OIL PRESSURE TOO HIGH LIGHT COMES ON DEALER DOES NOT HAVE SOLUTION. ENGINE COULD BLOW DURING OPERATION AND CAUSE ACCIDENT. VEHICLE RECALL NEEDED

09/02/20Component: POWER TRAIN,ELECTRICAL SYSTEMFire reported

I was slowing down to stop at a traffic light when a message was displayed on the instrument panel that says "Electrical System Malfunction" with a yellow battery icon. A few seconds later the same "Electrical System Malfunction" with a red battery icon. Then the vehicle came to a complete stop and was inoperable. There was almo smoke coming from the hood near the positive battery terminal. The smoke had an electrical smell to it. I had no opportunity to pull over and was stuck in the middle of a very busy road right at the stop line of the traffic light. My family and I had to exit the vehicl

05/09/20Component: ELECTRICAL SYSTEM

The central locking / electronic door lock system on my 2019 Audi A6 intermittently malfunctions, sometimes with a long beep sound and an error message appearing on the screen in front of my steering wheel. The affected system is available for inspection upon request. The issue does not happen all the time, but the door sometimes fails to unlock or appears to re-lock while I am trying to open it. In late April 2026, in the morning, I was leaving YogaSource in [XXX] . As I approached my vehicle in the parking lot, an unstable individual was approaching the area near my car. I attempted to enter

05/04/20Component: ENGINE

Every single EA839 Audi Engine has piston skirt and cylinder scoring.

04/27/20Component: ELECTRICAL SYSTEM,UNKNOWN OR OTHER

Shortly after purchasing in 2025 I began having occasional issues with the door locks. Eventually the issue would self resolve but now I have experienced at least 2 times in last month being locked inside the vehicle and unable to exit without climbing into the passenger seat. I have not taken it in for repairs yet due to cost concerns but I am worried about this dangerous situation.

04/22/20Component: ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE

Complete shut down of all electrical associated components while driving on highway Loss of power steering loss of braking loss of ability to accelerate transmission failure loss of lane detection, loss of car detection. Diagnosed as , faulty alternator recall repaired and continuation of same electrical failures despite six additional repairs Multiple failures of all electrical components on highway road and side roads

02/02/20Component: ELECTRICAL SYSTEM

Incident Summary for NHTSA Complaint Component Involved: Electrical System: Alternator / Charging System Vehicle State: In motion (City street/Highway) Speed at Failure: Approximately [Insert Speed] MPH Narrative Description: The vehicle suffered a catastrophic electrical failure while in motion, resulting in an immediate and total engine stall in live traffic. This failure occurred without sufficient warning to safely maneuver the vehicle to the shoulder, creating an immediate safety hazard and risk of collision. This is a recurring safety defect: Repeat Failure: This is the second time th

Showing the 8 most serious of 111 complaints filed with NHTSA.

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