2020 Audi TT — MOT failures & pass rate
Across 9,769 MOT tests, the 2020 Audi TT recorded a 93.0% pass rate. Coupes & convertibles of a similar age fail 8.2% of the time, so this is 1.2pp better than the group it competes with. Failures cluster in tyres, lighting & signalling and seat belts & restraints.
What the MOT record shows
Tyres dominates the failure mix at 5.1% of all tests — 4.3 points clear of lighting & signalling, so it is the first thing to check.
At component level the recurring items are tread depth, srs malfunction indicator lamp and headlamp aim — tread depth alone was recorded 310 times.
Mileage is the strongest signal on the record: 6.2% of 0-30k cars fail, rising to 10.5% once past 60-90k.
Advisories point at the next bill rather than this one: tyres was flagged on 22.4% of tests without failing them.
The trend is worsening — 3.5% of tests failed in 2022 against 6.6% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.1% | 502 |
| 2 | Lighting & signalling | 0.9% | 87 |
| 3 | Seat belts & restraints | 0.7% | 71 |
| 4 | Brakes | 0.7% | 67 |
| 5 | Visibility | 0.7% | 66 |
| 6 | Suspension | 0.4% | 35 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 310 |
| 2 | SRS malfunction indicator lamp | 67 |
| 3 | Headlamp aim | 57 |
| 4 | Registration plates | 52 |
| 5 | Brake pads | 48 |
| 6 | Wipers | 39 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 22.4% | 2,192 |
| 2 | Brakes | 9.6% | 941 |
| 3 | Other defects | 4.9% | 478 |
| 4 | Visibility | 2.5% | 244 |
| 5 | Suspension | 2.3% | 222 |
| 6 | Road wheels | 0.3% | 30 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 6,929 | 6.2% |
| 30-60k | 2,670 | 8.8% |
| 60-90k | 162 | 10.5% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2022 | 114 | 3.5% |
| 2023 | 3,268 | 7.0% |
| 2024 | 3,187 | 7.4% |
| 2025 | 3,186 | 6.6% |
What to check before buying a 2020 TT
On a 2020 TT, tyres is what the MOT record says goes wrong most — it appeared in 5.1% of tests. Check these areas before you commit.
- Tyres (5.1% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Lighting & signalling (0.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Seat belts & restraints (0.7% of tests): Belt damage or faulty pretensioners — usually straightforward but safety-critical. Typical repair: £50–£300.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2020 Audi TTs pass their MOT?
93.0% of the 9,769 2020 Audi TT MOT tests in this dataset passed — a 7.0% fail rate.
What is the most common MOT failure on a 2020 Audi TT?
Tyres, recorded in 5.1% of tests, followed by lighting & signalling (0.9%).
Does the 2020 TT get worse with mileage?
Its MOT fail rate rises from 6.2% in the 0-30k band to 10.5% in the 60-90k band.
Methodology & source. Based on 9,769 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.