2005 Seat Leon — MOT failures & pass rate
Across 13,718 MOT tests analysed for the 2005 Seat Leon, the most common recorded failure areas were lighting & signalling, brakes and suspension. Its pass rate of 73.7% was above the average for small family cars of a similar age (72.1%). Higher-mileage examples failed more often — 26.9% in the 150k+ group versus 15.2% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 15.1% | 2,068 |
| 2 | Brakes | 11.1% | 1,522 |
| 3 | Suspension | 10.4% | 1,432 |
| 4 | Body, structure & corrosion | 9.3% | 1,280 |
| 5 | Emissions & environmental | 8.1% | 1,117 |
| 6 | Tyres | 5.5% | 754 |
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 | 983 |
| 2 | Joints | 751 |
| 3 | Tread depth | 611 |
| 4 | Catalyst emissions | 586 |
| 5 | Position lamp | 567 |
| 6 | Rbt (sp) | 550 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 34.9% | 4,792 |
| 2 | Suspension | 30.7% | 4,211 |
| 3 | Tyres | 27.5% | 3,774 |
| 4 | Body, structure & corrosion | 21.6% | 2,960 |
| 5 | Emissions & environmental | 14.7% | 2,014 |
| 6 | Other defects | 14.0% | 1,924 |
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 | 46 | 15.2% |
| 30-60k | 470 | 22.3% |
| 60-90k | 1,746 | 25.8% |
| 90-120k | 3,645 | 25.8% |
| 120-150k | 4,137 | 27.0% |
| 150k+ | 3,664 | 26.9% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 7,234 | 25.9% |
| Diesel | 6,484 | 26.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,227 | 27.8% |
| 2022 | 3,273 | 26.8% |
| 2023 | 2,596 | 25.4% |
| 2024 | 2,066 | 24.8% |
| 2025 | 1,556 | 24.9% |
What to check before buying a 2005 Leon
Before buying a 2005 Seat Leon, focus on the areas it most often fails on. Lighting & signalling accounted for 15.1% of tests for this year.
- Lighting & signalling (15.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (11.1% 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.
- Suspension (10.4% 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.
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 2005 Seat Leons pass their MOT?
73.7% of the 13,718 2005 Seat Leon MOT tests in this dataset passed — a 26.3% fail rate.
What is the most common MOT failure on a 2005 Seat Leon?
Lighting & signalling, recorded in 15.1% of tests, followed by brakes (11.1%).
Does the 2005 Leon get worse with mileage?
Its MOT fail rate rises from 15.2% in the 0-30k band to 26.9% in the 150k+ band.
Methodology & source. Based on 13,718 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.