2020 BMW M4 MOT pass rate: 89.6% (3,278 tests)
Is the 2020 M4 getting worse?
Pass rate of 2020-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 89.6% -1.2 vs same-age |
|
| 2024 | 89.1% -0.8 vs same-age |
|
| 2025 | 90.1% +1.2 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 M4
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 394 | 72.7% |
| 2 | Suspension | 42 | 7.7% |
| 3 | Identification of the vehicle | 31 | 5.7% |
| 4 | Lamps, reflectors and electrical equipment | 19 | 3.5% |
| 5 | Brakes | 18 | 3.3% |
| 6 | Visibility | 15 | 2.8% |
All M4 years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2014 | 2,782 | 89.0% | +13.1 pts | 58,667 |
| 2015 | 5,497 | 87.7% | +9.0 pts | 53,713 |
| 2016 | 5,124 | 87.4% | +6.1 pts | 46,787 |
| 2017 | 5,757 | 86.9% | +2.9 pts | 39,726 |
| 2018 | 5,921 | 88.0% | +1.6 pts | 34,066 |
| 2019 | 5,167 | 89.2% | +0.8 pts | 27,757 |
| 2020 (this page) | 3,278 | 89.6% | -0.3 pts | 22,560 |
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FAQs
Is a 2020 BMW M4 reliable?
2020-registered examples passed 89.6% of their MOT tests (3,278 tests, 2023–2025), -0.3 points versus all UK cars registered in the same year. At roughly 6 years old with a median 22,560 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2020 M4?
The median tested example shows 22,560 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.