2021 Kia Niro 4 + EV MOT pass rate: 91.4% (14,343 tests)
Is the 2021 Niro 4 + EV getting worse?
Pass rate of 2021-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2024 | 91.7% +1.0 vs same-age |
|
| 2025 | 91.1% +0.9 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 Niro 4 + EV
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 1,275 | 67.9% |
| 2 | Visibility | 290 | 15.4% |
| 3 | Lamps, reflectors and electrical equipment | 133 | 7.1% |
| 4 | Brakes | 92 | 4.9% |
| 5 | Suspension | 34 | 1.8% |
| 6 | Seat belts and supplementary restraint systems | 16 | 0.9% |
All Niro 4 + EV years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2020 | 2,318 | 90.6% | +0.8 pts | 35,437 |
| 2021 (this page) | 14,343 | 91.4% | +1.0 pts | 35,354 |
- 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 Niro 4 + EV reliable?
2021-registered examples passed 91.4% of their MOT tests (14,343 tests, 2023–2025), +1.0 points versus all UK cars registered in the same year. At roughly 5 years old with a median 35,354 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2021 Niro 4 + EV?
The median tested example shows 35,354 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.