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2021 Audi A4 Service and Repair Manual
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$40.99 USD
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Covers all 2021 A4 trims — Select Sedan 4-Door, S Line Sedan 4-Door, Dynamic Sedan 4-Door ·
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$40.99
2021 Audi A4 Service and Repair Manual
Regular price
$40.99 USD
Unit price
This factory service and repair manual for the 2021 Audi A4 is built around this exact model year and trim lineup, giving you the specification and torque sequence Audi actually published for your sedan rather than a generic stand-in from another year.
This year's lineup ran two engines — the 2.0L L4 (DMSA) Turbocharged Mild Hybrid EV-Gas (MHEV) and the 2.0L L4 (DPAA) Turbocharged Mild Hybrid EV-Gas (MHEV) — and both are covered in full.
Engines covered
- 2.0L inline-four (121 cu in) — DOHC, turbocharged, gasoline
Body styles covered
- 4-door sedan
Trims covered
- Dynamic
- S Line
- Select
Known issues on the 2021 A4. Four recalls are on federal record for this model year. The first covers the rear seat belt automatic locking retractors, which can deactivate early and prevent a child restraint system from securing properly. The second covers rear axle alignment that may not have been inspected following an earlier trailing-arm repair, leaving misalignment that can cause premature or uneven tire wear. The third covers the trailing arm lock nut on the rear axle itself, which can break from stress corrosion and misalign the axle, risking a loss of control. The fourth covers the rearview camera display, which can go blank from a software issue and reduce rear visibility when backing up. Owners have filed 11 complaints for the year, and no technical service bulletins are logged. The factory diagnostic and repair procedures behind each of those systems are here.
From a rear axle and trailing-arm inspection to sorting out a blank backup camera display, it keeps you on the OEM procedure and the correct specification for your specific 2021 A4.
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, E-Tron Sportback Quattro, Q3, Q5, Q5 Sportback, Q7
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. Owner notification letters were mailed August 27, 2021. Owners may contact Volkswagen customer s
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, A6 Sedan, A7, A8, Q5, S4 Sedan, S5 Coupe, S5 Cabrio
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 or unevenly worn tires, free of charge. Owner notification letters were mailed March 3, 2022. Owner
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 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 se
Consequence
A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
Remedy
Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253
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 Coupe, A5 Cabrioleet, A4 Sedan, A4 Allroad, E-Tron Sp
Consequence
A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
Remedy
Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen
This bulletin provides a statement regarding the bottleneck of supply for VW approved oil types VW 504.00 and VW 507.00.
This bulletin provides information when DTC B105A1A, B103E25 is stored in 0017; fuel tank level implausible.
This bulletin provides information when DTC B105A1A, B103E25 is stored in 0017; fuel tank level implausible.
This service information TSB provides warranty coverage information for vehicles with a broken sunroof panel.
This bulletin provides informatoinw hent here are scratches or a coating on the cover of the instrument cluster, or particles inside of the housing.
This bulletin provides information when there is a film/visible rings on the clear glass cover of the headlight when the dipped beam is switched on.
This bulletin provides informaiton when the engine is not running smoothly, misfiring.
This bulletin provides information when there DTC P218500 is stored in temerature sender G83.
Showing the 8 most recent of 1023 technical service bulletins on file with NHTSA.
The contact leased a 2021 Audi A4. The contact stated that the dealer had provided her with the vehicle rental while her vehicle was being repaired. The contact stated that while driving at 4 MPH and
The contact owned a 2021 Audi A4. The contact stated that while driving at a low rate of speed through a parking lot, the vehicle independently accelerated and the brake pedal locked. The vehicle acce
The reversing image occasionally appears white screen phenomenon During the process of reversing, the reversing screen suddenly turns white and cannot see anything behind, which brings danger to the
The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app.
Tires are original equipment. Only 19,000 miles on them. Was told all 4 tires have belt shifts and hop some. Suggested they should be replaced. These tires were great when new but you could tell fro
I am writing to report a persistent issue with my 2021 Audi A4, VIN [XXX] . I have been experiencing a noticeable vibration, humming, and shuddering sensation that occurs specifically when turning at
The instrument cluster has failed per the recall 90VC. Audi issued the recall for every model made in 2021 with the exception of the A3 and A4 and I believe this was a mistake as my instrument cluster
I have a 2021 audi a4 that is also being affected by the instrument cluster failure/recall. My model , a4 was not included but I am experiencing the same failure and this was reported to the dealershi
Showing the 8 most serious of 11 complaints filed with NHTSA.
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