2021 Audi RS6: common problems and MOT failures
What MOT testers find on the Audi RS6 first registered in 2021: we looked at the 1,011 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
Common 2021 Audi RS6 MOT failures and advisories
The share of 2021 Audi RS6 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres14% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Wipers, windscreen and mirrors2% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Brakes2% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Suspension1% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
- Seats and seatbelts1% of testsRough price £80–£250
At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.
- Lights and electrics1% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
Known faults on the 2021 Audi RS6
Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.
- All engines
Electrical and infotainment faults
It came last of 24 executive cars in What Car?'s survey: 44% had a fault, about two-thirds electrical or infotainment (phones not connecting, flickering screens), and nearly half took over a week to fix.
At the viewing: Connect your phone, use the screens, and check every electrical item.
- All engines
Rattles and trim buzzes
Rattling parcel shelves and buzzing trim are reported.
At the viewing: Drive on a rough road and listen.
Questions to ask the seller before buying a 2021 Audi RS6
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- What has been fixed under warranty, and has the software been updated?
- Can I see the service history and receipts for any big jobs?
Looking at an Audi RS6?
Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.
Other years
Every year of the Audi RS6 compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2026 | – | Too new for MOT data |
| 2025 | – | Too new for MOT data |
| 2024 | – | Too new for MOT data |
| 2023 | – | Too new for MOT data |
| 2022 | 406 | Tyres 22% |
| 2020 | 1,875 | Tyres 16% |
| 2018 | – | Too few tests |
| 2017 | – | Too few tests |
| 2016 | – | Too few tests |
| 2015 | – | Too few tests |
| 2014 | 324 | Tyres 19% |
| 2013 | 140 | Tyres 14% |
| 2010 | – | Too few tests |
| 2009 | 255 | Brakes 19% |
| 2008 | 540 | Suspension 21% |
| 2005 | – | Too few tests |
| 2004 | 158 | Brakes 32% |
| 2003 | 272 | Brakes 31% |
| 2002 | – | Too few tests |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Audi RS6 cars first registered in 2021. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score