2021 Ford Fiesta Stline X T Mhev — MOT failures & pass rate
Across 6,351 MOT tests analysed for the 2021 Ford Fiesta Stline X T Mhev, the most common recorded failure areas were tyres, lighting & signalling and visibility. Its pass rate of 91.9% was in line with the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 15.6% in the 60-90k group versus 6.9% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.6% | 354 |
| 2 | Lighting & signalling | 5.4% | 344 |
| 3 | Visibility | 1.5% | 97 |
| 4 | Brakes | 0.8% | 50 |
| 5 | Emissions & environmental | 0.4% | 23 |
| 6 | Road wheels | 0.3% | 20 |
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 | 471 |
| 2 | Washers | 83 |
| 3 | Tread depth | 62 |
| 4 | Catalyst emissions | 37 |
| 5 | Wipers | 25 |
| 6 | Brake pads | 24 |
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 | 20.6% | 1,309 |
| 2 | Brakes | 6.6% | 418 |
| 3 | Road wheels | 4.9% | 308 |
| 4 | Other defects | 4.8% | 305 |
| 5 | Visibility | 1.4% | 88 |
| 6 | Lighting & signalling | 0.5% | 34 |
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 | 4,468 | 6.9% |
| 30-60k | 1,780 | 10.8% |
| 60-90k | 90 | 15.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 6,277 | 8.1% |
| Hybrid | 74 | 8.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 188 | 3.7% |
| 2024 | 3,080 | 8.2% |
| 2025 | 3,081 | 8.3% |
What to check before buying a 2021 Fiesta Stline X T Mhev
Before buying a 2021 Ford Fiesta Stline X T Mhev, focus on the areas it most often fails on. Tyres accounted for 5.6% of tests for this year.
- Tyres (5.6% 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.
- Lighting & signalling (5.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (1.5% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£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 Ford Fiesta Stline X T Mhevs pass their MOT?
91.9% of the 6,351 2021 Ford Fiesta Stline X T Mhev MOT tests in this dataset passed — a 8.1% fail rate.
What is the most common MOT failure on a 2021 Ford Fiesta Stline X T Mhev?
Tyres, recorded in 5.6% of tests, followed by lighting & signalling (5.4%).
Does the 2021 Fiesta Stline X T Mhev get worse with mileage?
Its MOT fail rate rises from 6.9% in the 0-30k band to 15.6% in the 60-90k band.
Methodology & source. Based on 6,351 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.