Home · 2020 Audi A6 (with Rear Seat Sabs) · Complaints

What 24 owners told NHTSA about the 2020 Audi A6 (with Rear Seat Sabs)

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (24)Electrical system (17)Driver assistance (5)Body & structure (3)Backup camera & sensors (2)Steering (2)Brakes (1)Engine (1)Fuel system (1)Seats (1)

1 of 24 complaints match · Seats · clear filters

Feb 8, 2026Electrical systemSeats

* Passenger front Seat wiring harness corrosion and failure due to water ingress due to leaking web plate in the longitudinal member on passenger side. Water ingress in passenger compartment caused electrical failure and black mold to grow in the interior carpet and seat rails as well as in an electrical well in the floor board. *Black mold and mildew can cause long term health risks to those persons exposed especially if one didn’t know the mold was present. *The vehicle has been repaired at VW dealership in Missoula, MT. Service tech couldn’t figure where the water was coming from. Finally did research to find an Audi TSB 2059792/5 with the cause and remedy. *Recently Purchased this car and later found the seat not working. The VW dealership/service found the electrical corrosion and mold. Mold was not visible until the seat was moved. Mold was extensive throughout the passenger side under the seat - spread and growing under the carpet, insulation and in the electrical well in the floor board. Pictures attached - tech write up also available upon request. No warning lights were present. ** Audi put out a TSB (Tech Service Bulletin) in 2023 and repaired the cars under warranty - assume this was a wide spread issue for a TSB to be issued and for Audi to manufacture parts to fix the problem. Mold can have serious long term consequences to anyone exposed. I believe Audi should have done a recall for safety reasons. I just bought the car on 1/10/26 used with under 40,000 miles. Carfax or other research did not turn up a recall. I have sent a letter to Audi of America detailing the problem, referencing the TSB and asking them to cover the cost of repair as they had covered the cost on vehicles under warranty. This car is just out of the 5 year warranty but has only 40,000 miles on it. No recall was issued that I can find. Any help you render would be appreciated. Mold exposure is serious if not immediate.

NHTSA ODI 11716608

Working with the data? Download all 24 complaints as CSV · fetched from NHTSA July 20, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2020 Audi A6 (with Rear Seat Sabs) verdict →