2012 Audi A3 — MOT failures & pass rate
162,730 MOT tests on the 2012 Audi A3 are in this dataset, and 79.4% of them passed. That is effectively the same as small family cars of a similar age (21.3% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and tyres.
What the MOT record shows
No single area dominates — lighting & signalling (9.1%) and suspension (8.8%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are coil spring, tread depth and headlamp aim — coil spring alone was recorded 8,068 times.
A 150k+ example is materially riskier than a 0-30k one: 24.0% versus 9.7%.
The petrol cars hold up better: 18.1% fail against 21.4% for diesel, a 3.3-point gap across 162,726 tests.
Tyres is the most common advisory, noted on 28.6% of tests — work that passed today but is likely due soon.
The trend is worsening — 18.1% of tests failed in 2021 against 23.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.1% | 14,744 |
| 2 | Suspension | 8.8% | 14,402 |
| 3 | Tyres | 6.9% | 11,177 |
| 4 | Brakes | 5.4% | 8,796 |
| 5 | Visibility | 2.6% | 4,304 |
| 6 | Body, structure & corrosion | 2.4% | 3,821 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Coil spring | 8,068 |
| 2 | Tread depth | 7,100 |
| 3 | Headlamp aim | 6,231 |
| 4 | Individual direction indicators | 5,321 |
| 5 | Brake pads | 3,691 |
| 6 | Service brake performance | 3,459 |
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 | 28.6% | 46,503 |
| 2 | Suspension | 23.3% | 37,911 |
| 3 | Brakes | 21.3% | 34,673 |
| 4 | Lighting & signalling | 10.9% | 17,674 |
| 5 | Other defects | 9.1% | 14,738 |
| 6 | Visibility | 5.8% | 9,407 |
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 | 1,649 | 9.7% |
| 30-60k | 16,570 | 14.8% |
| 60-90k | 45,640 | 18.8% |
| 90-120k | 51,632 | 21.8% |
| 120-150k | 30,747 | 23.4% |
| 150k+ | 16,450 | 24.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 124,483 | 21.4% |
| Petrol | 38,243 | 18.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 32,826 | 18.1% |
| 2022 | 32,760 | 19.2% |
| 2023 | 32,971 | 20.9% |
| 2024 | 32,532 | 22.1% |
| 2025 | 31,641 | 23.1% |
What to check before buying a 2012 A3
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 9.1% of tests. Start there.
- Lighting & signalling (9.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (8.8% 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.
- Tyres (6.9% 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.
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 2012 Audi A3s pass their MOT?
79.4% of the 162,730 2012 Audi A3 MOT tests in this dataset passed — a 20.6% fail rate.
What is the most common MOT failure on a 2012 Audi A3?
Lighting & signalling, recorded in 9.1% of tests, followed by suspension (8.8%).
Does the 2012 A3 get worse with mileage?
Its MOT fail rate rises from 9.7% in the 0-30k band to 24.0% in the 150k+ band.
Methodology & source. Based on 162,730 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.