2021 Kia Stonic GT-Line S Isg Mhev MOT pass rate: 95.2% (1,789 tests)
Is the 2021 Stonic GT-Line S Isg Mhev getting worse?
Pass rate of 2021-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2024 | 96.3% +5.7 vs same-age |
|
| 2025 | 94.1% +3.9 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 Stonic GT-Line S Isg Mhev
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Visibility | 34 | 29.3% |
| 2 | Tyres | 33 | 28.4% |
| 3 | Brakes | 28 | 24.1% |
| 4 | Lamps, reflectors and electrical equipment | 9 | 7.8% |
| 5 | Steering | 5 | 4.3% |
| 6 | Noise, emissions and leaks | 3 | 2.6% |
All Stonic GT-Line S Isg Mhev years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2021 (this page) | 1,789 | 95.2% | +4.8 pts | 22,050 |
- Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
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FAQs
Is a 2021 Kia Stonic GT-Line S Isg Mhev reliable?
2021-registered examples passed 95.2% of their MOT tests (1,789 tests, 2023–2025), +4.8 points versus all UK cars registered in the same year. At roughly 5 years old with a median 22,050 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2021 Stonic GT-Line S Isg Mhev?
The median tested example shows 22,050 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.