repaired · 2024 Q3
Back over prevention: display function
Risk. A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
2021 Audi A4Problems, recalls & complaints
NHTSA has logged 11 owner complaints about the 2021 Audi A4, most often about the electrical system. It is covered by 4 safety recalls, and for recall 22V-742 the manufacturer reports only 93% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 8, 2025. Updated daily. Photo: Calreyn88, CC BY-SA 4.0.
Complaints by system
Where the 2021 Audi A4 has problems
11 complaints grouped by the system owners reported.
3Electrical system
2Lane departure
2Power train
2Suspension1 crash/fire/injury
2Vehicle speed control2 crash/fire/injury
2Forward collision avoidance
1Tires
1Engine
1Air bags1 crash/fire/injury
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Electrical system | 3 | 0 |
| Lane departure | 2 | 0 |
| Power train | 2 | 0 |
| Suspension | 2 | 1 |
| Vehicle speed control | 2 | 2 |
| Forward collision avoidance | 2 | 0 |
| Tires | 1 | 0 |
| Engine | 1 | 0 |
| Air bags | 1 | 1 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
4 recalls
2021 Audi A4 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2023 Q4
Axle: non-powered axle assembly
Risk. Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
repaired · 2023 Q2
Seat belts
Risk. An unsecured child restraint system can increase the risk of injury during a crash.
repaired · 2023 Q1
Axle: non-powered axle assembly
Risk. A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Audi.
Best & worst years
2021 vs. every other A4 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the A4 median. How we score
'95'96'97'98'99'00'01'02'03'04'05'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
- Avoid
- Caution
- Solid
- Best
- Not rated
NHTSA crash tests
2021 Audi A4 safety ratings
2021 Audi A4 4 DR AWD in NHTSA's New Car Assessment Program. Photos are from NHTSA's crash tests.
★★★★★
Frontal crash★★★★★
Side barrier★★★★★
Side pole★★★★★
- Rollover: 5 stars (9.9% risk)
- Stability control: Standard
- Forward collision warning: Standard
- Lane departure warning: Standard
In owners' words
What A4 owners report
Recent electrical system complaints filed with NHTSA, shortened. Personal details are removed.
The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app.
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…
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,…
Own a 2021 A4?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.