2005 Audi A3 — MOT failures & pass rate
Across 66,781 MOT tests analysed for the 2005 Audi A3, the most common recorded failure areas were suspension, lighting & signalling and brakes. Its pass rate of 72.0% was in line with the average for small family cars of a similar age (72.1%). Higher-mileage examples failed more often — 29.3% in the 150k+ group versus 21.5% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 14.9% | 9,976 |
| 2 | Lighting & signalling | 14.7% | 9,810 |
| 3 | Brakes | 10.7% | 7,114 |
| 4 | Body, structure & corrosion | 8.9% | 5,963 |
| 5 | Emissions & environmental | 7.2% | 4,817 |
| 6 | Tyres | 6.9% | 4,602 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 5,534 |
| 2 | Joints | 4,948 |
| 3 | Pins and bushes | 3,643 |
| 4 | Coil spring | 3,049 |
| 5 | Linkage ball joint dust cover | 2,780 |
| 6 | Tread depth | 2,756 |
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 | 40.0% | 26,714 |
| 2 | Brakes | 30.7% | 20,511 |
| 3 | Tyres | 30.7% | 20,499 |
| 4 | Lighting & signalling | 18.0% | 12,002 |
| 5 | Body, structure & corrosion | 16.9% | 11,278 |
| 6 | Emissions & environmental | 13.8% | 9,241 |
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 | 288 | 21.5% |
| 30-60k | 1,891 | 19.1% |
| 60-90k | 6,639 | 24.9% |
| 90-120k | 14,672 | 27.8% |
| 120-150k | 18,752 | 28.5% |
| 150k+ | 24,467 | 29.3% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 38,759 | 28.8% |
| Petrol | 28,022 | 26.9% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 19,294 | 28.6% |
| 2022 | 16,167 | 27.7% |
| 2023 | 13,139 | 27.6% |
| 2024 | 10,349 | 28.0% |
| 2025 | 7,832 | 27.5% |
What to check before buying a 2005 A3
Before buying a 2005 Audi A3, focus on the areas it most often fails on. Suspension accounted for 14.9% of tests for this year.
- Suspension (14.9% 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.
- Lighting & signalling (14.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (10.7% 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 2005 Audi A3s pass their MOT?
72.0% of the 66,781 2005 Audi A3 MOT tests in this dataset passed — a 28.0% fail rate.
What is the most common MOT failure on a 2005 Audi A3?
Suspension, recorded in 14.9% of tests, followed by lighting & signalling (14.7%).
Does the 2005 A3 get worse with mileage?
Its MOT fail rate rises from 21.5% in the 0-30k band to 29.3% in the 150k+ band.
Methodology & source. Based on 66,781 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.