2021 Audi A6 Other or unknown Problems
- Complaints
- 2about this part
- Share
- 11%of 18 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the other or unknown of the 2021 Audi A6, 11% of the 18 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The car has had multiple issues with warning lights and malfunctioning systems. Including : 1.Child locks 2.Every single component of the ADAS 3. Emergency services being activated at least a few times a month - this is an SOS for emergency 911 service. The repeated, continuous and mostly false warning lights are a driving distraction that can easily cause an accident. I have photos of all warning lights coming on in the vehicle. …”
NHTSA complaint #11638013, filed 2025-01“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 accumulation and inadequate condensate drainage in the HVAC system. The vehicle was inspected and treated at an authorized Audi dealership; however, the treatment did not resolve the issue and the odor returned. …”
NHTSA complaint #11738142, filed 2026-05Related service bulletins
- 11038130Sep 25, 2026This bulletin states that technicians are required to report to the manufacturer when a vehicle has flooded, and specify the height to which the vehicle has been flooded.
- 11038027Sep 25, 2026This bulletin provides information for reporting safety related information to the manufacturer.
- 11038025Sep 15, 2026This bulletin provides information when the license plate mounting bracket threded inserts are stripped.
- 11038026Sep 8, 2026This bulletin provides infomraiton abou the Audi frequency analysis application, which is available in the App Store for Android and Apple phones.
- 11036917Aug 26, 2026This bulletin provides information when the horn sound quality is poor.
- 11036933Aug 21, 2026A particularly noticeable factor is the vibration of the air column in a tire. When a tire starts to vibrate because of the road contact, this can lead to cavity resonances…
- 11036934Aug 11, 2026This bulletin provides information when there is a paint issue on alloy wheels.
- 11035854Jul 27, 2026This bulletin provides a statement regarding the bottleneck of supply for VW approved oil types VW 504.00 and VW 507.00.
- 11034659Jun 29, 2026This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
- 11034642Jun 4, 2026This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident…
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 2 | 11% |
| 2020 | 5 | 19% |
| 2019 | 11 | 10% |
| 2018 | 2 | 18% |
| 2017 | 2 | 10% |
| 2016 | 3 | 6% |
| 2015 | 2 | 9% |
| 2014 | 3 | 7% |
| 2013 | 8 | 15% |
| 2012 | 2 | 3% |
| 2011 | 1 | 5% |
| 2009 | 1 | 5% |
| 2007 | 1 | 2% |
| 2006 | 2 | 3% |
| 2005 | 2 | 2% |
| 2003 | 2 | 3% |
| 2002 | 3 | 3% |
| 2001 | 4 | 4% |
| 2000 | 6 | 4% |
| 1999 | 3 | 1% |
| 1998 | 4 | 3% |
Other parts of the 2021 Audi A6
11 complaintsEngine
3 complaintsForward collision avoidance
2 complaintsTransmission and drivetrain
2 complaintsEngine cooling
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsSteering
1 complaintsBody and structure
1 complaints
← All problems reported for the 2021 Audi A6
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology