2021 Audi A4 problems and complaints
Owners have filed 11 complaints with NHTSA about the 2021 Audi A4. The most-reported areas: Electrical System (3), Unknown Or Other (3), Power Train (2).
Key takeaways
- 11 owner complaints on file with NHTSA.
- 3 involve a crash, 0 a fire, 1 reported injury.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 3 | 27% |
| Unknown Or Other | 3 | 27% |
| Power Train | 2 | 18% |
| Lane Departure | 2 | 18% |
| Forward Collision Avoidance | 2 | 18% |
| Suspension | 2 | 18% |
| Vehicle Speed Control | 2 | 18% |
| Tires | 1 | 9% |
| Engine | 1 | 9% |
| Air Bags | 1 | 9% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Audi A4 4 DR AWD | 5/5 | 4/5 | 5/5 | 5/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Electrical System - filed 2025-10-08
The instrument cluster has stop working. Have to monitore vehicle information, Mileage, service, Safty notifications and general vehicle information from the Audi app.
Tires - filed 2025-08-31
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 manuf...
Power Train - filed 2025-08-16
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 ...
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More for the 2021 Audi A4
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.