2017 Smart (mcc) Forfour MOT pass rate: 82.3% (14,090 tests)
Is the 2017 Forfour getting worse?
Pass rate of 2017-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 84.3% -1.4 vs same-age |
|
| 2024 | 81.8% -2.1 vs same-age |
|
| 2025 | 80.7% -1.7 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 2017 Forfour
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 1,538 | 32.7% |
| 2 | Noise, emissions and leaks | 664 | 14.1% |
| 3 | Suspension | 628 | 13.3% |
| 4 | Brakes | 571 | 12.1% |
| 5 | Visibility | 519 | 11.0% |
| 6 | Lamps, reflectors and electrical equipment | 493 | 10.5% |
All Forfour years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2005 | 1,746 | 66.2% | +1.7 pts | 93,596 |
| 2015 | 16,207 | 74.5% | -4.2 pts | 48,327 |
| 2016 | 15,612 | 77.9% | -3.4 pts | 41,668 |
| 2017 (this page) | 14,090 | 82.3% | -1.7 pts | 35,907 |
| 2018 | 11,275 | 86.1% | -0.2 pts | 28,696 |
| 2019 | 5,735 | 87.0% | -1.4 pts | 22,585 |
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FAQs
Is a 2017 Smart (mcc) Forfour reliable?
2017-registered examples passed 82.3% of their MOT tests (14,090 tests, 2023–2025), -1.7 points versus all UK cars registered in the same year. At roughly 9 years old with a median 35,907 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2017 Forfour?
The median tested example shows 35,907 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.