2012 SEAT Leon — MOT failures & pass rate
56,567 MOT tests on the 2012 SEAT Leon are in this dataset, and 79.5% of them passed. That is effectively the same as small family cars of a similar age (21.2% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (9.7%) and lighting & signalling (8.5%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, shock absorbers and tread depth — headlamp aim alone was recorded 2,763 times.
A 150k+ example is materially riskier than a 0-30k one: 23.2% versus 6.3%.
Fuel type barely separates them — petrol fails 19.9% of the time against 20.7% for diesel.
Suspension is the most common advisory, noted on 30.3% of tests — work that passed today but is likely due soon.
The trend is worsening — 18.3% of tests failed in 2021 against 22.8% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 9.7% | 5,461 |
| 2 | Lighting & signalling | 8.5% | 4,783 |
| 3 | Brakes | 6.6% | 3,752 |
| 4 | Tyres | 6.3% | 3,582 |
| 5 | Body, structure & corrosion | 3.5% | 1,960 |
| 6 | Emissions & environmental | 2.6% | 1,488 |
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 | 2,763 |
| 2 | Shock absorbers | 2,173 |
| 3 | Tread depth | 2,108 |
| 4 | Service brake performance | 1,609 |
| 5 | Brake pads | 1,545 |
| 6 | Headlamp | 1,510 |
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 | 30.3% | 17,138 |
| 2 | Tyres | 29.4% | 16,657 |
| 3 | Brakes | 24.1% | 13,610 |
| 4 | Other defects | 9.5% | 5,359 |
| 5 | Lighting & signalling | 9.1% | 5,163 |
| 6 | Body, structure & corrosion | 8.5% | 4,831 |
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 | 333 | 6.3% |
| 30-60k | 5,073 | 13.9% |
| 60-90k | 17,206 | 19.2% |
| 90-120k | 19,430 | 21.8% |
| 120-150k | 10,247 | 23.1% |
| 150k+ | 4,270 | 23.2% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 46,106 | 20.7% |
| Petrol | 10,461 | 19.9% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 12,017 | 18.3% |
| 2022 | 11,788 | 19.6% |
| 2023 | 11,481 | 20.6% |
| 2024 | 11,043 | 21.8% |
| 2025 | 10,238 | 22.8% |
What to check before buying a 2012 Leon
The failure pattern for this year is specific enough to inspect against: suspension accounted for 9.7% of tests. Start there.
- Suspension (9.7% 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 (8.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (6.6% 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 2012 SEAT Leons pass their MOT?
79.5% of the 56,567 2012 SEAT Leon MOT tests in this dataset passed — a 20.5% fail rate.
What is the most common MOT failure on a 2012 SEAT Leon?
Suspension, recorded in 9.7% of tests, followed by lighting & signalling (8.5%).
Does the 2012 Leon get worse with mileage?
Its MOT fail rate rises from 6.3% in the 0-30k band to 23.2% in the 150k+ band.
Methodology & source. Based on 56,567 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.