CSR

Audi · NHTSA safety record

2021 Audi A4

Every safety complaint, recall and defect investigation the US government holds on this vehicle.

11

Complaints

3

Crashes

0

Fires

1

Injuries

0

Deaths

Owners of the 2021 Audi A4 have filed 11 safety complaints with NHTSA between May 2021 and October 2025. The most complained-about system is the electrical system, named in 3 of them (27%). The typical failure was reported at 2,674 miles, the median across the 2 complaints that gave an odometer reading.

NHTSA has issued 4 recalls covering this vehicle.

Recalls (4)

BACK OVER PREVENTION:DISPLAY FUNCTION

22V742000 · October 5, 2022

The defect
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 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's number for this recall is 91DZ.

Volkswagen Group of America, Inc. · up to 170,296 vehicles across all model years covered

TIRES

22V034000 · January 26, 2022

The defect
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 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. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L5.

Volkswagen Group of America, Inc. · up to 31,058 vehicles across all model years covered

SEAT BELTS:REAR/OTHER:RETRACTOR

21V606000 · August 5, 2021

The defect
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 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 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).

Volkswagen Group of America, Inc. · up to 45,496 vehicles across all model years covered

SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY

21V295000 · April 26, 2021

The defect
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 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 1-800-253-2834. Audi's number for this recall is 42L1.

Volkswagen Group of America, Inc. · up to 40,993 vehicles across all model years covered

What owners report

Complaints naming each system. One complaint can name several, so these add up to more than 11.

ELECTRICAL SYSTEM 3 27%
UNKNOWN OR OTHER 3 27%
FORWARD COLLISION AVOIDANCE 2 18%
LANE DEPARTURE 2 18%
POWER TRAIN 2 18%
SUSPENSION 2 18%
VEHICLE SPEED CONTROL 2 18%
AIR BAGS 1 9%
ENGINE 1 9%
TIRES 1 9%

When the complaints arrived

By the year NHTSA received them, which is not the year the failures happened. They peaked in 2025 at 7.

2021 2025
2021 to 2025

In owners' own words

Quoted from NHTSA's complaint file. These are unverified accounts by the people who filed them, not findings of fault.

VEHICLE SPEED CONTROL

1 injured · crash · towed · 1,347 miles

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 turning into a parking pace on the 4th floor of a parking garage, the vehicle inadvertently accelerated on its own at 100 MPH. The contact depressed the brake pedal several times but it failed to respond. The vehicle crashed into the fence of steel and broke a portion of the wall. The air bags deployed. There were no warning lights illuminated. The contact sustained two concussions and a heart attack. The contact sought medical assistance the next day and had been seeking medical assistance. A

NHTSA complaint 11440644, quoted in part. Filed by an owner and not verified by NHTSA or by us.

AIR BAGS

crash · towed · 4,000 miles

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 accelerated up a hill as the contact was unable to depress the brake pedal; he collided with an electric pole which caused the vehicle to stop. Due to the shock and abruptness of the failure, the contact was uncertain if any warning lights illuminated the instrument panel. The air bags did not deploy upon impact. The contact and no other bystanders were injured as a result of the failure. The police and fire department arrived at the scene and a police report was filed. Due to the failure, the

NHTSA complaint 11418441, quoted in part. Filed by an owner and not verified by NHTSA or by us.

UNKNOWN OR OTHER

crash

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 driver and others, causing danger to life and property. Apparently the dealer didn't take this seriously

NHTSA complaint 11459964. Filed by an owner and not verified by NHTSA or by us.

ELECTRICAL SYSTEM
The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app.

NHTSA complaint 11692106. Filed by an owner and not verified by NHTSA or by us.

TIRES
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 from driving they were degrading. I'm [XXX] and never had an issue with tires this new. The belt shifting could be a manufacturing issue or hitting to many potholes. I suspect it is a combination of the two. Tire size is 245/40R18. Looking at internet reviews, these tires are great but wear out very prematurely. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint 11684155. Filed by an owner and not verified by NHTSA or by us.

POWER TRAIN
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 slow speeds (e.g., in a parking lot or when making a tight turn at an intersection). This issue has been diagnosed at a dealership, and the diagnostic report from the service invoice dated 07/12/2025 noted "VIBRATION HUMMING SHUDDER WHILE TURNING." The vehicle's mileage at the time was 38,888 miles. Dealership diagnosed this issue as a failing AWD clutch system. I took the car to a different repair shop, and they redirected me to the Audi Technical Service Bulletin (TSB). The symptoms described

NHTSA complaint 11681029, quoted in part. Filed by an owner and not verified by NHTSA or by us.

UNKNOWN OR OTHER
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 has the same failure.

NHTSA complaint 11680440. Filed by an owner and not verified by NHTSA or by us.

ELECTRICAL SYSTEM
The main instrument cluster is not stable- it tries to start up then crashes. As a result, speedometer, rpm’s, gas tank gauge, etc are not available while driving. The screen displays blank with a red triangle, tries to start up then crashes again. This seems similar to Audi recall campaign 90VC, but for some reason the A4 was not included in the recall, but I’m having similar symptoms with my A4.

NHTSA complaint 11667730. Filed by an owner and not verified by NHTSA or by us.

ENGINE
The vehicle at 13,xxx miles on the high ways, and during stop & go traffic; vehicle begins to tremble, transmission and floor shakes, rpms are higher than normal, abnormal noises coming from engine (screeching), jerking on acceleration on the first gears, rough idle, happens only on highways after 1hr of driving. Can drive over 40 min without any check engine light turning on. No codes come up, while clearly having issues. After a day of being off, car goes back to normal without those issues, just vibrations and pulsing on idle. -happens on Texas highways where vehicle begins to have trouble with acceleration and transmission shakes yet no check engine or error messages appear. -problem

NHTSA complaint 11652167, quoted in part. Filed by an owner and not verified by NHTSA or by us.

Compare

Other years of the Audi A4

Model year Complaints Recalls Deaths
2020 127 3
2019 10 1
2018 44 1
2017 54 1
2014 31 0
2010 64 0

Other 2021 Audi models

Every Audi on this site — 147 vehicles, 216 recall campaigns and 0 open investigation s.

If this is your car and a dealer keeps failing to fix it, your state's lemon law may require the manufacturer to replace it or buy it back. What each state asks for , read from the statutes.

Where these numbers come from

A complaint is one owner's account and has not been verified by NHTSA or by us. A vehicle with more complaints is not necessarily worse: models that sold in larger numbers collect more of them. How this is counted.

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