MOT fail rates by first-use year
2021 Audi TT MOT fail rate and common faults
How Audi TT cars first used in 2021 did at their MOTs from 2024 to 2025, against all cars of the same age. From 4,969 DVSA MOT tests of these cars. First use is usually the date the car was first registered.
MOT data updated
At 4 years, tested in 2025
What stands out
- In 2025, at 4 years old, Audi TT cars first used in 2021 failed 8.1% of MOTs (2,481 tests), 5.3 points below the 13.4% for all cars that age.
- From 2024 to 2025, as these cars went from 3 to 4 years old, the fail rate moved from 9.5% to 8.1%.
- Audi TT cars first used a year earlier, in 2020, failed 9.1% at the same age of 4 years (3,012 tests, in 2024).
- The most common fail item that is not a wear item, for the Audi TT at 4 years, is airbag (SRS) warning light on, at 0.4 per 100 MOTs (all cars: 0.1).
MOT fail rate by test year
| Test year | Age | MOT fail rate | Tests (n) | All cars | Difference |
|---|---|---|---|---|---|
| 2024 | 3 years | 9.5% | 2,488 | 12.1% | −2.6 pts |
| 2025 | 4 years | 8.1% | 2,481 | 13.4% | −5.3 pts |
Most common faults at 4 years
These figures cover all Audi TT MOTs at 4 years: cars first used 2018 to 2021, tested 2022 to 2025 (n=14,426). The list uses every first-use year so it has enough tests. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.
MOT fail items
| Fail item | Per 100 MOTs | All cars |
|---|---|---|
| Tyre tread below 1.6 mm Wear | 2.3 | 1.4 |
| Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords Wear | 1.4 | 1.5 |
| Tyre with cords exposed Wear | 0.6 | 0.9 |
| Tyre condition: has a bulge, caused by separation or partial failure of its structure Wear | 0.5 | 0.4 |
| Headlight aimed too high Wear | 0.5 | 0.6 |
| Airbag (SRS) warning light on | 0.4 | 0.1 |
| Brake pads under 1.5 mm Wear | 0.4 | 1.3 |
| Wipers not clearing screen Wear | 0.4 | 2.5 |
| Tyre pressure monitoring system: malfunctioning or obviously inoperative | 0.3 | 0.3 |
| Headlamp aim: too low Wear | 0.3 | 0.6 |
Per 100 of the MOTs above (n=14,426). A test with two items counts once for each.
Advisories
| Advisory | Per 100 MOTs | All cars |
|---|---|---|
| Tyre tread close to the legal limit or worn on the edge Wear | 13.4 | 12.4 |
| Tyre condition: slightly damaged/cracking or perishing Wear | 5.4 | 6.3 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 5.1 | 5.2 |
| Brake pads wearing thin Wear | 5.0 | 6.9 |
| Non-component advisories: Nail in tyre | 3.4 | 2.1 |
| Tyre condition: has a cut but not deep enough to reach the ply or cords Wear | 2.3 | 1.8 |
| Tyre tread close to the legal limit, under the 1.0 mm rule Wear | 1.9 | 1.8 |
| Windscreen: damaged but not adversely affecting driver's view | 1.6 | 1.5 |
| Shock absorber misting oil | 1.2 | 1.2 |
| Tyre condition: slightly damaged Wear | 1.2 | 0.7 |
Per 100 of the MOTs above (n=14,426). A test with two items counts once for each.
Fuel type at 4 years
These figures cover all Audi TT MOTs at 4 years: cars first used 2018 to 2021, tested 2022 to 2025 (n=14,426). Each fuel is set against all cars of the same fuel and age. Fuels with fewer than 1,000 tests are not shown.
| Fuel | Share of tests | MOT fail rate | Tests (n) | All cars, same fuel | Median mileage |
|---|---|---|---|---|---|
| Petrol | 97.9% | 8.0% | 14,130 | 12.0% | 23,036 miles |
Fail rate by mileage at 4 years
These figures cover all Audi TT MOTs at 4 years: cars first used 2018 to 2021, tested 2022 to 2025 (n=14,426). At 4 years, Audi TT cars at 30,000 to 60,000 miles failed more often (10.6%, n=3,981) than those at under 30,000 miles (7.0%, n=10,214). Bands with fewer than 1,000 tests are not shown.
| Mileage at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|
| Under 30,000 miles | 7.0% | 10,214 | 10.2% |
| 30,000 to 60,000 miles | 10.6% | 3,981 | 15.5% |
Car tax rules for a 2021 car
- Cars first registered from 1 April 2017 pay a first-year rate set by CO2 emissions, then the standard rate each year. A petrol, diesel or hybrid car with a list price over £40,000 also pays the expensive car supplement for five years, from the second tax payment.
These are the rules, not the amount for a specific car. Car tax check
ULEZ and clean air zones
- Petrol cars first registered from 2006 usually meet Euro 4, the petrol standard for the London ULEZ, so they usually do not pay the daily charge.
- Diesel cars first registered from September 2015 usually meet Euro 6, the diesel standard for the London ULEZ, so they usually do not pay the daily charge.
- The clean air zones in Birmingham and Bristol use the same Euro 4 petrol and Euro 6 diesel standards. The low emission zones in Scotland use them too, but enforce them with fines, not a daily charge.
The Euro standard of the car decides, not the year alone. ULEZ checker
Other years of the Audi TT
Other Audi models first used in 2021
| Model | Age at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|---|
| Audi A3 (2021) | 4 years in 2025 | 11.3% | 20,710 | 13.4% |
| Audi A1 (2021) | 4 years in 2025 | 10.3% | 14,162 | 13.4% |
| Audi Q2 (2021) | 4 years in 2025 | 7.5% | 14,160 | 13.4% |
| Audi Q5 (2021) | 4 years in 2025 | 9.2% | 11,460 | 13.4% |
| Audi Q3 (2021) | 4 years in 2025 | 8.2% | 11,339 | 13.4% |
| Audi A4 (2021) | 4 years in 2025 | 12.3% | 7,173 | 13.4% |
| Audi e-tron (2021) | 4 years in 2025 | 9.5% | 6,793 | 13.4% |
| Audi A5 (2021) | 4 years in 2025 | 12.1% | 5,319 | 13.4% |
More on the Audi TT
Found one you might buy? Vet the specific car.
These figures describe 2021 Audi TT cars as a group, not any one car. The VetTheCar Buying Report looks at the car you are buying: its MOT history, what similar cars did next, and what to ask the seller.
Source
Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.
Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources
Car tax and clean air zone rules are summarised from GOV.UK and Transport for London guidance. They are general rules and are not drawn from the MOT data.