2004 Audi Tt — MOT failures & pass rate
Across 32,500 MOT tests analysed for the 2004 Audi Tt, the most common recorded failure areas were lighting & signalling, suspension and brakes. Its pass rate of 73.1% was below the average for coupes & convertibles of a similar age (77.0%). Higher-mileage examples failed more often — 32.5% in the 150k+ group versus 11.1% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 14.2% | 4,611 |
| 2 | Suspension | 11.6% | 3,758 |
| 3 | Brakes | 9.1% | 2,946 |
| 4 | Emissions & environmental | 8.4% | 2,730 |
| 5 | Body, structure & corrosion | 6.5% | 2,112 |
| 6 | Tyres | 5.4% | 1,750 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Position lamp | 2,473 |
| 2 | Headlamp aim | 1,845 |
| 3 | Malfunction indicator lamp | 1,808 |
| 4 | Pins and bushes | 1,679 |
| 5 | Coil spring | 1,618 |
| 6 | Joints | 1,511 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 36.9% | 12,002 |
| 2 | Brakes | 36.2% | 11,771 |
| 3 | Tyres | 24.6% | 7,984 |
| 4 | Body, structure & corrosion | 16.1% | 5,247 |
| 5 | Lighting & signalling | 14.6% | 4,750 |
| 6 | Emissions & environmental | 9.1% | 2,966 |
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 | 370 | 11.1% |
| 30-60k | 2,564 | 17.5% |
| 60-90k | 7,875 | 23.6% |
| 90-120k | 11,761 | 28.5% |
| 120-150k | 7,232 | 30.0% |
| 150k+ | 2,671 | 32.5% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 7,724 | 27.7% |
| 2022 | 7,166 | 26.3% |
| 2023 | 6,549 | 26.9% |
| 2024 | 5,867 | 27.6% |
| 2025 | 5,194 | 26.0% |
What to check before buying a 2004 Tt
Before buying a 2004 Audi Tt, focus on the areas it most often fails on. Lighting & signalling accounted for 14.2% of tests for this year.
- Lighting & signalling (14.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (11.6% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Brakes (9.1% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
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 2004 Audi Tts pass their MOT?
73.1% of the 32,500 2004 Audi Tt MOT tests in this dataset passed — a 26.9% fail rate.
What is the most common MOT failure on a 2004 Audi Tt?
Lighting & signalling, recorded in 14.2% of tests, followed by suspension (11.6%).
Does the 2004 Tt get worse with mileage?
Its MOT fail rate rises from 11.1% in the 0-30k band to 32.5% in the 150k+ band.
Methodology & source. Based on 32,500 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.