2003 Audi A3 — MOT failures & pass rate
Across 14,443 MOT tests, the 2003 Audi A3 recorded a 71.0% pass rate. That is effectively the same as small family cars of a similar age (28.1% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 18.7% of tests against 14.4% for the next-worst category.
At component level the recurring items are headlamp aim, headlamp and coil spring — headlamp aim alone was recorded 1,555 times.
Condition tracks the odometer closely. Failures run at 21.7% in the 0-30k band and 30.8% in the 150k+ band, a 9.1-point spread.
The petrol cars hold up better: 28.0% fail against 30.1% for diesel, a 2.1-point gap across 14,443 tests.
Suspension is the most common advisory, noted on 38.5% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 31.1% in 2021 to 27.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 18.7% | 2,704 |
| 2 | Suspension | 14.4% | 2,078 |
| 3 | Brakes | 11.5% | 1,659 |
| 4 | Body, structure & corrosion | 7.4% | 1,070 |
| 5 | Emissions & environmental | 6.9% | 994 |
| 6 | Tyres | 6.0% | 872 |
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 | 1,555 |
| 2 | Headlamp | 981 |
| 3 | Coil spring | 824 |
| 4 | Pins and bushes | 694 |
| 5 | Joints | 633 |
| 6 | Position lamp | 590 |
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 | 38.5% | 5,558 |
| 2 | Brakes | 37.2% | 5,370 |
| 3 | Tyres | 29.3% | 4,236 |
| 4 | Lighting & signalling | 23.7% | 3,427 |
| 5 | Body, structure & corrosion | 17.5% | 2,526 |
| 6 | Emissions & environmental | 14.9% | 2,157 |
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 | 60 | 21.7% |
| 30-60k | 547 | 18.5% |
| 60-90k | 1,725 | 25.6% |
| 90-120k | 3,191 | 29.2% |
| 120-150k | 3,663 | 29.7% |
| 150k+ | 5,243 | 30.8% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 7,428 | 28.0% |
| Diesel | 7,015 | 30.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,659 | 31.1% |
| 2022 | 3,484 | 28.6% |
| 2023 | 2,706 | 28.8% |
| 2024 | 2,039 | 26.5% |
| 2025 | 1,555 | 27.3% |
What to check before buying a 2003 A3
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 18.7% of tests. Start there.
- Lighting & signalling (18.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (14.4% 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 (11.5% 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 2003 Audi A3s pass their MOT?
71.0% of the 14,443 2003 Audi A3 MOT tests in this dataset passed — a 29.0% fail rate.
What is the most common MOT failure on a 2003 Audi A3?
Lighting & signalling, recorded in 18.7% of tests, followed by suspension (14.4%).
Does the 2003 A3 get worse with mileage?
Its MOT fail rate rises from 21.7% in the 0-30k band to 30.8% in the 150k+ band.
Methodology & source. Based on 14,443 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.