2021 Audi Q8 Service and Repair Manual

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Factory-Grade Data

2021 Audi Q8 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

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

Engines covered

  • 3.0L 2995CC V6 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

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Vehicle Safety Data

2021 Audi Q8 Recalls & Complaints

NHTSA #21V29500026/04/2021Component: SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sed

Consequence

A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a

Remedy

Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner n

NHTSA #22V03400026/01/2022Component: TIRES

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A5 Sportback, RS5 Coupe, RS5 Sportback, S5 Sportback, 2020-2021 A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A6 Allroad, A

Consequence

Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.

Remedy

Dealers will inspect the rear axle, adjust the alignment as necessary, and replace any prematurely o

NHTSA #22V51600020/07/2022Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2019-2021 Audi Q8, and 2020-2021 Audi Q7 vehicles. A component inside the fuel pump may break, causing the fuel pump to fail.

Consequence

Fuel pump failure can cause an engine stall, increasing the risk of a crash.

Remedy

Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed December

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 fro

Consequence

A rearview image that does not display reduces the driver's view behind the vehicle, increasing the

Remedy

Dealers will update the software, free of charge. Owner notification letters were mailed January 14,

NHTSA #22V74200005/10/2022Component: BACK OVER PREVENTION:DISPLAY FUNCTION

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Audi A8, RS7, RS6 Avant, RS5 Sportback, RS5 Coupe, Q8, Q7, Q5 Sportback, S4 Sedan, Q5, A7, A6, A6 Allroad, A5 Sportback, A5 Cou

Consequence

A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a cr

Remedy

Dealers will update the infotainment unit software, free of charge. Owner notification letters were

NHTSA #21V60600005/08/2021Component: SEAT BELTS:REAR/OTHER:RETRACTOR

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Volkswagen ID4, Audi A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A5 Sportback, A6 Allroad, A6 Sedan, A7, A8, E-Tron Quattro,

Consequence

An unsecured child restraint system can increase the risk of injury during a crash.

Remedy

Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge

TSB #11032201

This bulletin provides information on how to reset the Bang and Olufsen treble loud speaker after the protection function is triggered.

TSB #11032194

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

TSB #11032174

This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.

TSB #11032173

This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.

TSB #11032165

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

TSB #11032157

This bulletin provides information when the sliding glass panoramic sunroof is leaking.

TSB #11032139

This bulletin provides informaiton when the radiator fans run constantly and the windshield wipers don't work.

TSB #11032137

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

Showing the 8 most recent of 1259 technical service bulletins on file with NHTSA.

20260330Component: STEERING

Belt Starter Generator failure rendered car undrivable -- power steering failed while in motion. Issue is subject to Class Action Settlement in USDistrict Court, Case # 3:23-cv-02291-RK-RLS. But th

20260330Component: ELECTRICAL SYSTEM

Belt Starter Generator failure rendered car undrivable -- power steering failed while in motion. Issue is subject to Class Action Settlement in USDistrict Court, Case # 3:23-cv-02291-RK-RLS. But th

20260330Component: UNKNOWN OR OTHER

Belt Starter Generator failure rendered car undrivable -- power steering failed while in motion. Issue is subject to Class Action Settlement in USDistrict Court, Case # 3:23-cv-02291-RK-RLS. But th

20260130Component: POWER TRAIN

Audi Q8 failed water pump leading to severe loss of power and a major safety issue. I was merging on a very busy highway when I had loss of power with my children in the vehicle. This was alarming as

20260119Component: ENGINE

The engine (internal mechanical failure) malfunctioned. The vehicle developed a persistent ticking/knocking noise from the engine bay, and the authorized Audi dealer diagnosed the issue as requiring a

Showing the 5 most serious of 43 complaints filed with NHTSA.

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