2015 Audi TT diesel: common problems and MOT failures
What MOT testers find on the diesel Audi TT first registered in 2015 (diesel cars only): we looked at the 8,249 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
What goes wrong more than usual on a 2015 Audi TT diesel?
Parts flagged at MOT more often on the 2015 Audi TT diesel than on all cars registered in 2015.
- Shock absorbers1.7× usualAudi TT7.7% All 2015 cars4.6%
Failed outright at MOT: 2.5%, against 0.9% of all 2015 cars. The rest were advisories or minor defects.
Rough price £200–£300 (pair, average rear to front) ClickMechanicAt the viewing: Push down hard on each corner. It should bounce once and settle. Look for oil on the shock absorber body.
- Suspension arm4.6× usualAudi TT3.2% All 2015 cars0.7%
Failed outright at MOT: 0.1%, against 0.1% of all 2015 cars. The rest were advisories or minor defects.
Rough price £120–£180 (one arm) ClickMechanicAt the viewing: Listen for clunks over bumps and feel for the steering wandering. Worn arm bushes show as cracked rubber near the wheels.
Suspension arm bushes and joints: 1.6% here, against 5.9% of all 2015 cars. Coil springs: 1% here, against 4.3% of all 2015 cars.
Common 2015 Audi TT diesel MOT failures and advisories
The share of 2015 Audi TT diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres31% 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.
- Brakes22% 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.
- Suspension13% 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.
- Lights and electrics7% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Wipers, windscreen and mirrors5% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Seats and seatbelts1% of testsRough price £80–£250
At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.
Known faults on the 2015 Audi TT diesel
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.
- Built 2014 to 2019
Fuel tank recall (built Apr 2014 to May 2019)
The fuel tank could be damaged in a crash. Cars built 29 April 2014 to 24 May 2019 need a shield fitted.
At the viewing: Ask an Audi dealer to confirm the recall was done.
- Some cars
Airbag recalls
Recalls covered front airbag gas generators that could burst and curtain airbags that might not protect properly.
At the viewing: Ask an Audi dealer to check the VIN for outstanding recalls.
- All engines
Air con faults
7% of cars in What Car?'s 2025 survey had an air con fault.
At the viewing: Make sure it blows properly cold.
- Earlier cars
Worn seat bolsters and squeaky brakes (early cars)
Earlier cars can have worn leather seat bolsters and squeaky front brake pads.
At the viewing: Look at the seat edges and listen when braking.
Questions to ask the seller before buying a 2015 Audi TT diesel
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Has the fuel tank shield been fitted?
- Have the airbag recalls been done?
- Any recent work on the shock absorbers? (Flagged at MOT 1.7× as often on the 2015 Audi TT diesel as on other cars the same age.)
- Any recent work on the suspension arm? (Flagged at MOT 4.6× as often on the 2015 Audi TT diesel as on other cars the same age.)
- Can I see the service history and receipts for any big jobs?
Looking at an Audi TT?
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 TT compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2026 | – | Too new for MOT data |
| 2024 | – | Too new for MOT data |
| 2023 | – | Too new for MOT data |
| 2022 | 2,678 | Tyres 26% |
| 2021 | 4,840 | Tyres 27% |
| 2020 | 8,985 | Tyres 27% |
| 2019 | 13,661 | Tyres 26% |
| 2018 | 12,268 | Tyres 27% |
| 2017 | 22,028 | Tyres 28% |
| 2016 | 27,336 | Tyres 28% |
| 2014 | 11,780 | Tyres 28% |
| 2013 | 18,841 | Tyres 29% |
| 2012 | 16,689 | Tyres 29% |
| 2011 | 19,042 | Tyres 29% |
| 2010 | 19,131 | Tyres 31% |
| 2009 | 17,769 | Suspension 32% |
| 2008 | 21,188 | Suspension 33% |
| 2007 | 23,285 | Suspension 34% |
| 2006 | 8,624 | Suspension 39% |
| 2005 | 10,650 | Suspension 46% |
| 2004 | 13,682 | Suspension 46% |
| 2003 | 13,932 | Suspension 48% |
| 2002 | 12,176 | Suspension 48% |
| 2001 | 8,181 | Suspension 49% |
| 2000 | 5,215 | Suspension 49% |
| 1999 | 1,021 | Suspension 49% |
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 TT cars first registered in 2015. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score