2012 SEAT Altea — MOT failures & pass rate
The 2012 SEAT Altea passed 79.3% of its 10,497 recorded MOT tests. MPVs of a similar age fail 22.6% of the time, so this is 1.9pp better than the group it competes with. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (9.8%) and suspension (9.6%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, coil spring and service brake performance — headlamp aim alone was recorded 572 times.
Mileage is the strongest signal on the record: 9.9% of 0-30k cars fail, rising to 26.3% once past 150k — 2.7× the risk.
Fuel type barely separates them — petrol fails 20.2% of the time against 20.8% for diesel.
Advisories point at the next bill rather than this one: tyres was flagged on 30.1% of tests without failing them.
The trend is worsening — 18.1% of tests failed in 2021 against 22.9% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.8% | 1,027 |
| 2 | Suspension | 9.6% | 1,005 |
| 3 | Brakes | 6.7% | 702 |
| 4 | Tyres | 5.9% | 615 |
| 5 | Body, structure & corrosion | 3.0% | 318 |
| 6 | Visibility | 2.9% | 310 |
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 | 572 |
| 2 | Coil spring | 415 |
| 3 | Service brake performance | 344 |
| 4 | Shock absorbers | 342 |
| 5 | Tread depth | 288 |
| 6 | Brake pads | 281 |
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 | 30.1% | 3,160 |
| 2 | Suspension | 25.8% | 2,708 |
| 3 | Brakes | 24.9% | 2,611 |
| 4 | Lighting & signalling | 13.5% | 1,420 |
| 5 | Other defects | 8.8% | 928 |
| 6 | Body, structure & corrosion | 7.6% | 796 |
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 | 111 | 9.9% |
| 30-60k | 1,513 | 14.7% |
| 60-90k | 3,731 | 19.8% |
| 90-120k | 3,220 | 22.9% |
| 120-150k | 1,368 | 23.8% |
| 150k+ | 547 | 26.3% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 9,858 | 20.8% |
| Petrol | 639 | 20.2% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 2,217 | 18.1% |
| 2022 | 2,161 | 18.7% |
| 2023 | 2,167 | 21.9% |
| 2024 | 2,048 | 22.4% |
| 2025 | 1,904 | 22.9% |
What to check before buying a 2012 Altea
On a 2012 Altea, lighting & signalling is what the MOT record says goes wrong most — it appeared in 9.8% of tests. Check these areas before you commit.
- Lighting & signalling (9.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (9.6% 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 (6.7% 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 2012 SEAT Alteas pass their MOT?
79.3% of the 10,497 2012 SEAT Altea MOT tests in this dataset passed — a 20.7% fail rate.
What is the most common MOT failure on a 2012 SEAT Altea?
Lighting & signalling, recorded in 9.8% of tests, followed by suspension (9.6%).
Does the 2012 Altea get worse with mileage?
Its MOT fail rate rises from 9.9% in the 0-30k band to 26.3% in the 150k+ band.
Methodology & source. Based on 10,497 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.