2021 Ford Fiesta ST-Line Edition Turbo MOT pass rate: 91.3% (7,943 tests)
Is the 2021 Fiesta ST-Line Edition Turbo getting worse?
Pass rate of 2021-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2024 | 91.8% +1.1 vs same-age |
|
| 2025 | 90.9% +0.7 vs same-age |
The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.
What fails on a 2021 Fiesta ST-Line Edition Turbo
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 457 | 43.4% |
| 2 | Brakes | 172 | 16.3% |
| 3 | Lamps, reflectors and electrical equipment | 164 | 15.6% |
| 4 | Noise, emissions and leaks | 85 | 8.1% |
| 5 | Visibility | 81 | 7.7% |
| 6 | Seat belts and supplementary restraint systems | 31 | 2.9% |
All Fiesta ST-Line Edition Turbo years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2020 | 19,482 | 89.8% | -0.1 pts | 26,896 |
| 2021 (this page) | 7,943 | 91.3% | +0.9 pts | 24,430 |
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FAQs
Is a 2021 Ford Fiesta ST-Line Edition Turbo reliable?
2021-registered examples passed 91.3% of their MOT tests (7,943 tests, 2023–2025), +0.9 points versus all UK cars registered in the same year. At roughly 5 years old with a median 24,430 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2021 Fiesta ST-Line Edition Turbo?
The median tested example shows 24,430 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.
Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.