4 recalls and 2 owner complaints on file with NHTSA for the 2021 Audi S4.
4
recalls
2
owner complaints
0
complaints mentioning a crash
0
mentioning a fire
Recalls apply to specific production ranges. To see whether a particular car still has an open recall, enter its VIN at nhtsa.gov/recalls. Repairs for safety recalls are free at authorised dealers.
2021 Audi S4 recalls
Back over prevention: display function
NHTSA campaign 22V742000 · reported October 5, 2022 · Volkswagen Group of America, Inc. · 170,296 vehicles potentially affected
The problem
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 Sportback Quattro, SQ7, S5 Cabriolet, E-Tron Quattro, SQ8, SQ5 Sportback, SQ5, S8, S7, S6 Sedan, S5 Sportback, S5 Coupe, 2022 E-Tron GT, and 2021-2022 RSQ8 vehicles. Due to a software issue, a blank or black screen may be displayed instead of the rearview camera image when the vehicle is placed in reverse gear. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
The risk
A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
The fix
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's number for this recall is 91DZ.
NHTSA campaign 22V034000 · reported January 26, 2022 · Volkswagen Group of America, Inc. · 31,058 vehicles potentially affected
The problem
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 Cabriolet, S6 Sedan, S7, S8, SQ5, 2021 Q5 Sportback, Q7, Q8, RS6 Avant, RS7, RSQ8, SQ5 Sportback, SQ7, and SQ8 vehicles. The rear axle alignment may not have been inspected after the repairs for Recall 21V-295 (42L1) were performed.
The risk
Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
The fix
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. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L5.
Seat belts · Seat belts: rear/other, retractor
NHTSA campaign 21V606000 · reported August 5, 2021 · Volkswagen Group of America, Inc. · 45,496 vehicles potentially affected
The problem
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, Q8, RS5 Sportback, RS5 Coupe, RS6 Avant, RS7, RSQ8, S4 Sedan, S5 Cabriolet, S5 Coupe, S5 Sportback, S6 Sedan, S7, S8, SQ5, SQ5 Sportback, SQ7, SQ8, and 2021-2022 S3 Sedan vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
The risk
An unsecured child restraint system can increase the risk of injury during a crash.
The fix
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 service at 1-800-893-5298 and Audi customer service at 1-800-253-2834. Volkswagen's numbers for this recall are 69CR (VW) and 69CS (Audi).
Suspension: rear, axle, non-powered axle assembly
NHTSA campaign 21V295000 · reported April 26, 2021 · Volkswagen Group of America, Inc. · 40,993 vehicles potentially affected
The problem
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 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion.
The risk
A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
The fix
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 1-800-253-2834. Audi's number for this recall is 42L1.
Most reported problems
Areas named in owner complaints to NHTSA. One complaint can name several areas.
Electrical system1
Unknown or other1
What owners report
Recent complaints filed with NHTSA, shortened. These are unverified accounts from owners, not findings.
Sep 25, 2025 · Electrical system · 31,000 miles
The contact owns a 2021 Audi S4. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of automotive power. The check engine warning light was illuminated. The message "Drive System Malfunction - Please Contact Service" was displayed. In addition, the vehicle hesitated to…
Jan 31, 2023 · Unknown or other
2021 AUDI S4. CONSUMER WRITES IN REGARD TO NHTSA SAFETY RECALL 22V-742. THE CONSUMER IS DISGUSTED AND DISATISFIED WITH THE AUDI SERVICE DEPARTMENT PROCEDURES FOR PERFORMING THE RECALLS.
Across all years, the 2000 S4 has the most complaints (143). All Audi S4 years →
Questions
Does the 2021 Audi S4 have any recalls?
Yes. NHTSA lists 4 recalls for the 2021 Audi S4, the most recent reported on October 5, 2022 (Back over prevention: display function). Check a specific car by its VIN at nhtsa.gov/recalls.
What are the most common problems with the 2021 Audi S4?
Owners have filed 2 complaints with NHTSA. The most frequently reported area is electrical system (1 complaints), followed by unknown or other (1).
How many 2021 Audi S4 complaints mention a crash or fire?
0 of 2 complaints report a crash and 0 a fire; 0 injuries were reported in total. Complaints are unverified reports from owners.
Source: NHTSA recall and complaint data, updated October 27, 2026. Latest complaint received September 25, 2025.