MOT performance
Audi TT diesel: MOT pass rate and common failures
Of 38,705 MOT tests on diesel Audi TTs in 2023–2024 (on average 10.4 years old at test, median 82,311 miles), 78.1% passed first time, against 75.3% of 190,514 petrol Audi TT tests. Allowing for age, mileage and fuel, diesel Audi TTs failed 32% less often than comparable cars — 0.68× against 0.73× for the Audi TT as a whole.
38,705 MOT tests on 19,441 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
Check a specific car's MOT history and running costsAt a glance
| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 78.1% | ±0.4 pts (95%), n = 38,705 |
| All Audi TTs | 75.8% | n = 229,223 |
| Failures vs similar cars | 0.68× | same age, mileage and fuel = 1.00; Audi TT overall 0.73× |
| Tests with a dangerous defect | 7.6% | n = 38,705 |
| Average age at test | 10.4 years | n = 38,705 |
| Registration years covered | 1998–2018 | DVSA first-use date |
Diesel against the other Audi TT fuels
Official DVSA test results by fuel, with 73 Auto's adjusted ratio (failures against cars of the same age, mileage and fuel). The diesel cars were tested 2 years younger on average than the petrol ones, so the raw pass rates partly reflect age; the adjusted column doesn't.
| Fuel | Tests | Average age | First-time pass | vs similar cars | Dangerous |
|---|---|---|---|---|---|
| Petrol | 190,514 | 12.4 yrs | 75.3% | -26% | 6.7% |
| Diesel | 38,705 | 10.4 yrs | 78.1% | -32% | 7.6% |
Where diesel Audi TTs differ
- Steering: diesel Audi TTs failed 82% less often than the Audi TT overall, relative to comparable cars (0.07× vs 0.41×).
- Body, chassis and structure: diesel Audi TTs failed 67% less often than the Audi TT overall, relative to comparable cars (0.20× vs 0.62×).
- Noise, emissions and leaks: diesel Audi TTs failed 35% less often than the Audi TT overall, relative to comparable cars (0.53× vs 0.81×).
- Seat belts and airbags: diesel Audi TTs failed 29% less often than the Audi TT overall, relative to comparable cars (0.64× vs 0.89×).
| Area | Diesel (vs similar) | All Audi TTs (vs similar) |
|---|---|---|
| Tyres | 6.9% (-3%) | 6.2% (-5%) |
| Suspension | 6.1% (-46%) | 7.2% (-37%) |
| Lights, reflectors and electrical | 5.8% (-53%) | 8.4% (-41%) |
| Brakes | 4.7% (-40%) | 5.7% (-32%) |
| Driver's view of the road | 3.2% (-30%) | 3.3% (-41%) |
| Noise, emissions and leaks | 1.6% (-47%) | 3.9% (-19%) |
| Body, chassis and structure | 0.8% (-79%) | 3.0% (-38%) |
| Seat belts and airbags | 0.7% (-36%) | 1.2% (-11%) |
| Registration plates and VIN | 0.5% (+22%) | 0.4% (+1%) |
| Road wheels | 0.3% (-40%) | 0.3% (-35%) |
Most common diesel Audi TT failure items
| Item | Area | Share of tests |
|---|---|---|
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 3.29% |
| Coil spring: fractured or broken | Suspension | 2.00% |
| Condition: has ply or cords exposed | Tyres | 1.60% |
| Wipers: does not clear the windscreen effectively | Driver's view of the road | 1.45% |
| Brake pads: less than 1.5 mm thick | Brakes | 1.43% |
Pass rate by age, by fuel
| Age at test (years) | diesel pass rate (tests) | petrol pass rate (tests) |
|---|---|---|
| 3-4 | — | 91.2% (14,790) |
| 5-6 | 86.7% (3,063) | 89.9% (20,950) |
| 7-8 | 83.5% (8,506) | 88.2% (23,333) |
| 9-10 | 81.8% (7,786) | 84.5% (14,706) |
| 11-12 | 77.3% (8,269) | 79.2% (15,775) |
| 13-15 | 69.4% (10,594) | 71.4% (29,612) |
| 16+ | 69.1% (317) | 60.6% (67,012) |
Audi TT by registration year
Registration-year pages cover every fuel of that year.
- 2000 Audi TT · 58.6%
- 2001 Audi TT · 58.3%
- 2002 Audi TT · 57.7%
- 2003 Audi TT · 58.0%
- 2004 Audi TT · 59.0%
- 2005 Audi TT · 60.1%
- 2006 Audi TT · 61.6%
- 2007 Audi TT · 66.3%
- 2008 Audi TT · 68.5%
- 2009 Audi TT · 72.0%
- 2010 Audi TT · 72.8%
- 2011 Audi TT · 76.3%
- 2012 Audi TT · 81.0%
- 2013 Audi TT · 83.2%
- 2014 Audi TT · 84.0%
- 2015 Audi TT · 86.0%
- 2016 Audi TT · 88.0%
- 2017 Audi TT · 89.1%
- 2018 Audi TT · 90.4%
- 2019 Audi TT · 91.5%
- 2020 Audi TT · 91.0%
- 2021 Audi TT · 90.3%
What this does and doesn't tell you
Fuel is DVSA's recorded fuel type; plug-in and self-charging hybrids are grouped as hybrid. A difference between fuels can come from the engines themselves, or from how the cars are used — diesels typically cover more miles, and the adjusted ratio allows for mileage band but not for every difference in use. For one car, its own MOT history is the better guide: see MOT check.
Check a specific diesel Audi TT
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.