NHTSA vehicle safety data

2021 Audi A4 Recalls, Ratings & Complaints

The 2021 Audi A4 has 4 NHTSA recall campaigns and 11 owner complaints on file as of November 3, 2026. Recall repairs are usually free at an authorized Audi dealer.

NHTSA recall and complaint data for the 2021 Audi A4, plus NCAP crash-test ratings. Recall data is refreshed daily from NHTSA.

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2021 Audi A4 owner complaints

Owners have filed 11 complaints with NHTSA about the 2021 Audi A4, describing incidents dated April 26, 2021 to September 2, 2025.

Most-cited components

Electrical System 3 complaints
Unknown or Other 3 complaints
Forward Collision Avoidance 2 complaints
Lane Departure 2 complaints
Power Train 2 complaints
Suspension 2 complaints

Of the 11 complaints on file, 3 report a crash; across all 11 complaints, owners report 1 injury (owner-reported, not verified by NHTSA).

Newest complaints

ODI #11692106 · Filed October 8, 2025
The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app.
ODI #11684155 · Filed August 31, 2025
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…
ODI #11681029 · Filed August 16, 2025
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…

Read all 11 complaints

Rearview Display Inoperative/FMVSS 111

NHTSA #22V742000 · Back Over Prevention — Display Function · NHTSA notice

Reported October 5, 2022 · Volkswagen Group of America, Inc.

Potentially affected: 170,296 vehicles

Repair completion: 95.9% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 91DZ · Owners notified October 25, 2022

Defect description

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."

Safety consequence

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

Manufacturer 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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Rear Axle May Be Misaligned

NHTSA #22V034000 · Tires · NHTSA notice

Reported January 26, 2022 · Volkswagen Group of America, Inc.

Potentially affected: 31,058 vehicles

Repair completion: 98.49% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 42L5 · Owners notified March 3, 2022

Defect description

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.

Safety consequence

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

Manufacturer 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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Seat Belt Locking Retractor Malfunction/FMVSS 208

NHTSA #21V606000 · Seat Belts — Rear/Other — Retractor · NHTSA notice

Reported August 5, 2021 · Volkswagen Group of America, Inc.

Potentially affected: 45,496 vehicles

Repair completion: 98.51% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 69CR, 69CS · Owners notified August 27, 2021

Defect description

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."

Safety consequence

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

Manufacturer 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).

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Rear Axle Lock Nuts May Break

NHTSA #21V295000 · Suspension — Rear — Axle — Non-Powered Axle Assembly · NHTSA notice

Reported April 26, 2021 · Volkswagen Group of America, Inc.

Potentially affected: 40,993 vehicles

Repair completion: 98.66% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 42L1 · Owners notified June 4, 2021

Defect description

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.

Safety consequence

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

Manufacturer 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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

2021 Audi A4 4 DR AWD

out of 5

Overall Safety Rating

Frontal Crash

Driver: 4, Passenger: 4

Side Crash

Driver: 5, Passenger: 5

Side Pole

Rollover

10% rollover risk

Safety Technology

Electronic Stability Control Forward Collision Warning Lane Departure Warning

11 owner complaints have been filed with NHTSA for the 2021 Audi A4.

Electrical System

ODI #11692106

Incident: September 2, 2025 · Filed: October 8, 2025

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

Tires

ODI #11684155

Incident: August 10, 2025 · Filed: August 31, 2025

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)

Power Train

ODI #11681029

Incident: January 8, 2025 · Filed: August 16, 2025

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 in the TSB—"vibrations, humming, droning, or rubbing can be heard and/or felt in the vehicle interior... when the steering wheel is turned to full lock"—perfectly matches my experience. TSB Link - [XXX] The vehicle details are: Model: Audi A4 Year: 2021 VIN: [XXX] Current Mileage: 39490 Since this is an issue due to a sub-optimal part shipped by Audi, many other Audi owners are also facing similar issues. Therefore, I want to report this issue to the NHTSA and take action on cars sold by Audi. This issue divert driver attention and is a potential cause of accident while taking the turn as driver may get distracted. I already got my car serviced at Audi dealership but they didn't inform me about this issue while the car was under warranty. Now the car is out of warranty after Apr-2025, I'm facing this issue significantly and dealership is charging close to $5000 to fix the issue. Please let me know what information you require from me to proceed. I would like Audi to place a recall on the car models facing this issue and implement the fix for all owners facing the issue because of faulty part shipped by Audi of America. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Unknown or Other; Lane Departure; Forward Collision Avoidance

ODI #11680440

Incident: August 13, 2025 · Filed: August 13, 2025

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.

Electrical System; Lane Departure; Forward Collision Avoidance

ODI #11677729

Incident: March 27, 2025 · Filed: August 1, 2025

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 dealership. An online search will show just how many people have issues with the instrument cluster. The instrument cluster screen just went out while driving. I have to monitor my functions via the app on my phone. The dealer wants to charge me full price when every other model in 2021 has been recalled for the same issue. The A4 should be added to the instrument cluster recall for 2021 audi.

Electrical System

ODI #11667730

Incident: December 7, 2024 · Filed: June 18, 2025

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.

Power Train; Unknown or Other; Engine

ODI #11652167

Incident: September 13, 2023 · Filed: April 1, 2025

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 has been shown to one Audi dealer while happening and another Audi dealer was able to reproduce the problem. They even noted how vehicle will do all the issues noted above while not providing any error codes or messages. - vehicle has been inspected but all they do is reset software and hand back keys. While issues are still prevalent. - no warning, no over heat or any codes appear on the vehicle. Issues started at 13,xxx miles. Only on long highway or stop and go traffic does it happens

Unknown or Other

ODI #11459964

Crash

Incident: June 1, 2021 · Filed: April 7, 2022

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

Suspension; Vehicle Speed Control

ODI #11440644

Crash 1 injury

Incident: October 22, 2021 · Filed: November 16, 2021

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 police report was filed. The vehicle was towed to the dealer and it was totaled. The manufacturer was notified of the failure. The approximate failure mileage was 1,347.

Suspension

ODI #11425403

Incident: April 26, 2021 · Filed: July 19, 2021

The contact owns a 2021 Audi A4. The contact received notification of NHTSA campaign number: 21V295000 (Suspension) however, the part to do the recall repair was unavailable. The vehicle was taken to the local dealer who stated that the parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

Other Audi A4 model years

Check your 2021 Audi A4 VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Audi A4 at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

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