2021 AUDI S4 Recalls

Published by Reclia Safety Desk | June 25, 2026

Recall Summary
The 2021 Audi S4 is subject to four distinct safety recall campaigns conducted by Volkswagen Group of America, Inc. (Audi). These recalls address issues related to rear seat belt retractors, rear axle alignment, rear axle lock nuts, and the rearview camera display. Each recall was initiated after the manufacturer identified noncompliance with Federal Motor Vehicle Safety Standards (FMVSS) or a safety risk that could lead to injury or crash. Owners are urged to have all open recalls completed at no cost.

Affected Vehicle
The vehicle in question is the 2021 Audi S4 sedan. This model year is included in all four recall campaigns listed below. The recalls also cover a wide range of other Audi and Volkswagen models, but this record focuses solely on the 2021 Audi S4.

Recalled Components

1. Rear Seat Belt Retractors (NHTSA Campaign Number: 21V606000)
– Component: SEAT BELTS:REAR/OTHER:RETRACTOR
– Issue: The rear seat belt automatic locking retractors may deactivate prematurely. This can prevent a child restraint system from being secured properly, violating FMVSS No. 208 (“Occupant Crash Protection”).
– Consequence: An unsecured child restraint increases the risk of injury during a crash.
– Remedy: Dealers will inspect and, if necessary, replace the middle-rear seat belt assemblies free of charge. Owner notification letters were mailed August 27, 2021. Audi’s recall number is 69CS.

2. Rear Axle Alignment (NHTSA Campaign Number: 22V034000)
– Component: TIRES
– Issue: After repairs for a prior recall (21V-295, campaign 42L1), the rear axle alignment may not have been inspected. This oversight can lead to rear axle misalignment.
– Consequence: Misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
– Remedy: Dealers will inspect the rear axle, adjust alignment as needed, and replace any prematurely or unevenly worn tires, all free of charge. Owner notification letters were mailed March 3, 2022. Audi’s recall number is 42L5.

3. Rear Axle Lock Nut (NHTSA Campaign Number: 21V295000)
– Component: SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY
– Issue: The lock nut on the trailing arm of the rear axle may break due to stress corrosion.
– Consequence: A broken lock nut can misalign the rear axle, potentially causing loss of vehicle control and increasing crash risk.
– Remedy: Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Audi’s recall number is 42L1.

4. Rearview Camera Display (NHTSA Campaign Number: 22V742000)
– Component: BACK OVER PREVENTION:DISPLAY FUNCTION
– Issue: A software issue may cause a blank or black screen instead of the rearview camera image when the vehicle is placed in reverse. This violates FMVSS No. 111 (“Rear Visibility”).
– Consequence: A blank display reduces 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. Volkswagen’s recall number is 91DZ.

What Owners Should Do
Owners of a 2021 Audi S4 should take the following steps:

– Check for open recalls: Visit the National Highway Traffic Safety Administration (NHTSA) website at www.nhtsa.gov/recalls or call the Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153). Enter the vehicle’s 17-character Vehicle Identification Number (VIN) to see all open recalls.
– Contact Audi: For any open recall, schedule a free repair at an authorized Audi dealer. Audi customer service can be reached at 1-800-253-2834. Provide the specific recall numbers (69CS, 42L5, 42L1, or 91DZ) when scheduling.
– Do not delay: Even if no symptoms are noticed, the underlying defects can compromise safety. Repairs are performed at no cost to the owner.
– Keep records: After repairs, ensure

Frequently Asked Questions