2021 Seat Leon Dynamic — MOT failures & pass rate
Across 1,200 MOT tests analysed for the 2021 Seat Leon Dynamic, the most common recorded failure areas were tyres, suspension and lighting & signalling. Its pass rate of 90.8% was in line with the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 4.8% | 58 |
| 2 | Suspension | 2.3% | 28 |
| 3 | Lighting & signalling | 2.2% | 26 |
| 4 | Visibility | 1.6% | 19 |
| 5 | Brakes | 1.5% | 18 |
| 6 | Seat belts & restraints | 0.9% | 11 |
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 | 28 |
| 2 | Shock absorbers | 20 |
| 3 | Tread depth | 17 |
| 4 | Washers | 14 |
| 5 | Brake pads | 14 |
| 6 | SRS malfunction indicator lamp | 10 |
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 | 25.3% | 304 |
| 2 | Suspension | 12.5% | 150 |
| 3 | Brakes | 7.1% | 85 |
| 4 | Other defects | 5.8% | 70 |
| 5 | Visibility | 2.7% | 32 |
| 6 | Road wheels | 0.6% | 7 |
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 | 406 | 7.4% |
| 30-60k | 571 | 9.6% |
| 60-90k | 177 | 12.4% |
| 90-120k | 40 | 10.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 903 | 9.2% |
| Diesel | 297 | 9.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 611 | 10.0% |
| 2025 | 569 | 8.4% |
What to check before buying a 2021 Leon Dynamic
Before buying a 2021 Seat Leon Dynamic, focus on the areas it most often fails on. Tyres accounted for 4.8% of tests for this year.
- Tyres (4.8% 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.
- Suspension (2.3% 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 (2.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
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 2021 Seat Leon Dynamics pass their MOT?
90.8% of the 1,200 2021 Seat Leon Dynamic MOT tests in this dataset passed — a 9.3% fail rate.
What is the most common MOT failure on a 2021 Seat Leon Dynamic?
Tyres, recorded in 4.8% of tests, followed by suspension (2.3%).
Does the 2021 Leon Dynamic get worse with mileage?
Its MOT fail rate rises from 7.4% in the 0-30k band to 10.0% in the 90-120k band.
Methodology & source. Based on 1,200 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.