2020 MG ZS MOT pass rate: 84.9% (12,965 tests)
Is the 2020 ZS getting worse?
Pass rate of 2020-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 88.6% -2.2 vs same-age |
|
| 2024 | 85.1% -4.9 vs same-age |
|
| 2025 | 81.0% -7.9 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 2020 ZS
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Brakes | 1,160 | 30.9% |
| 2 | Tyres | 839 | 22.4% |
| 3 | Lamps, reflectors and electrical equipment | 711 | 18.9% |
| 4 | Noise, emissions and leaks | 435 | 11.6% |
| 5 | Visibility | 218 | 5.8% |
| 6 | Suspension | 216 | 5.8% |
All ZS years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2018 | 14,946 | 81.1% | -5.2 pts | 38,774 |
| 2019 | 23,583 | 83.1% | -5.3 pts | 31,565 |
| 2020 (this page) | 12,965 | 84.9% | -5.0 pts | 25,283 |
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FAQs
Is a 2020 MG ZS reliable?
2020-registered examples passed 84.9% of their MOT tests (12,965 tests, 2023–2025), -5.0 points versus all UK cars registered in the same year. At roughly 6 years old with a median 25,283 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2020 ZS?
The median tested example shows 25,283 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.