2021 Audi A6 problems and complaints
Owners have filed 17 complaints with NHTSA about the 2021 Audi A6. The most-reported areas: Electrical System (11), Engine (3), Unknown Or Other (2).
Key takeaways
- 17 owner complaints on file with NHTSA.
- 0 involve a crash, 0 a fire, 0 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 11 | 65% |
| Engine | 3 | 18% |
| Unknown Or Other | 2 | 12% |
| Power Train | 2 | 12% |
| Forward Collision Avoidance | 2 | 12% |
| Fuel/Propulsion System | 1 | 6% |
| Engine And Engine Cooling | 1 | 6% |
| Steering | 1 | 6% |
| Structure | 1 | 6% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Audi A6 4 DR AWD | 5/5 | 4/5 | 5/5 | 5/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Electrical System,engine,fuel/Propulsion System - filed 2026-09-21
While operating the vehicle under normal driving conditions, the vehicle suffered an immediate, un-commanded loss of engine power and throttle response. The vehicle displayed a critical dashboard restriction stating: “Maximum engine speed 2500 RPM”, forcing an emergency limp-home mode that instantly created a roadway c...
Electrical System - filed 2026-09-04
The vehicle went in for a software update. After purchasing the vehicle, the software update was part of a recall. Since that recall was performed, my vehicle has a lot of electronic glitches and a lot of issues. My external Morty just got done, paying 4500 to track down a central locking issue on top of the electronic...
Unknown Or Other - filed 2026-05-15
My 2021 Audi A6 produces a strong mold and mildew odor from the HVAC/air conditioning system. The smell occurs consistently after the air conditioning is turned off and persists when entering the vehicle. The issue appears to originate from mold growth on the evaporator coil or dampers, likely caused by moisture accumu...
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More for the 2021 Audi A6
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.