2001 Audi S3 — MOT failures & pass rate
The 2001 Audi S3 passed 78.0% of its 685 recorded MOT tests. Against small family cars of a similar age (27.9% fail rate), the 2001 S3 comes out 5.8pp better. Failures cluster in lighting & signalling, suspension and emissions & environmental.
What the MOT record shows
No single area dominates — lighting & signalling (11.8%) and suspension (8.9%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are catalyst emissions, headlamp aim and rigid brake pipes — catalyst emissions alone was recorded 85 times.
Mileage matters less than usual here: the 2001 S3 fails 21.9% of the time in the 60-90k band and 22.4% at 150k+, a spread of only 0.5 points.
Suspension is the most common advisory, noted on 29.5% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 26.3% in 2021 to 18.1% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.8% | 81 |
| 2 | Suspension | 8.9% | 61 |
| 3 | Emissions & environmental | 8.9% | 61 |
| 4 | Brakes | 8.2% | 56 |
| 5 | Body, structure & corrosion | 4.7% | 32 |
| 6 | Tyres | 4.5% | 31 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Catalyst emissions | 85 |
| 2 | Headlamp aim | 59 |
| 3 | Rigid brake pipes | 40 |
| 4 | Coil spring | 28 |
| 5 | Joints | 22 |
| 6 | Tread depth | 21 |
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 | 29.5% | 202 |
| 2 | Brakes | 28.9% | 198 |
| 3 | Body, structure & corrosion | 18.0% | 123 |
| 4 | Tyres | 17.7% | 121 |
| 5 | Emissions & environmental | 13.6% | 93 |
| 6 | Lighting & signalling | 12.8% | 88 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 60-90k | 41 | 21.9% |
| 90-120k | 166 | 18.1% |
| 120-150k | 246 | 24.4% |
| 150k+ | 214 | 22.4% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 179 | 26.3% |
| 2022 | 144 | 22.2% |
| 2023 | 148 | 18.9% |
| 2024 | 120 | 22.5% |
| 2025 | 94 | 18.1% |
What to check before buying a 2001 S3
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 11.8% of tests. Start there.
- Lighting & signalling (11.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (8.9% 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.
- Emissions & environmental (8.9% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 2001 Audi S3s pass their MOT?
78.0% of the 685 2001 Audi S3 MOT tests in this dataset passed — a 22.0% fail rate.
What is the most common MOT failure on a 2001 Audi S3?
Lighting & signalling, recorded in 11.8% of tests, followed by suspension (8.9%).
Does the 2001 S3 get worse with mileage?
Its MOT fail rate rises from 21.9% in the 60-90k band to 22.4% in the 150k+ band.
Methodology & source. Based on 685 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.