In 2025, 22,239 Smart Mcc Forfour cars had a regular MOT in Great Britain. 72% passed first time, compared with 76% for all cars of the same ages, which makes the Forfour about average. Adjusted for age, it ranks 172 of the 217 most-tested car models.
That comparison matters: older cars fail more often, so a raw pass rate flatters models that are mostly young. We compare each model against every car on the road at the same age.
Pass rate by age
At 6 years old, 81% of Forfours passed first time (all cars that age: 84%). By 20 years, that figure is 58% (all cars: 58%). It trails the average car at most ages, most noticeably at 10 years (6 points behind).
Smart Mcc Forfour All cars of that age
| Age | Tests | Forfour passed first time | All cars | Typical mileage |
|---|---|---|---|---|
| 6 years | 1,950 | 81% | 84% | 31,225 |
| 7 years | 3,785 | 80% | 81% | 36,572 |
| 8 years | 4,743 | 76% | 78% | 43,639 |
| 9 years | 5,261 | 71% | 75% | 49,232 |
| 10 years | 5,416 | 66% | 72% | 55,688 |
| 19 years | 378 | 56% | 57% | 98,659 |
| 20 years | 460 | 58% | 58% | 95,925 |
What fails most on a Smart Mcc Forfour
The area that lets the Forfour down most, relative to other cars, is emissions and leaks: 7.5% of tests failed on it, 1.9 times the rate for the average car. It does comparatively well on steering and brakes.
Share of Forfour tests failing on this area Average car
The six most common failure items
| Failure item | Area | Share of tests |
|---|---|---|
| A suspension pin, bush or joint excessively worn | Suspension | 5.4% |
| Tyre tread depth not in accordance with the requirements | Tyres | 4.5% |
| Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | Lights and electrics | 3.4% |
| Wiper blade missing or obviously not clearing the windscreen | Visibility | 3.3% |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | Emissions and leaks | 3.0% |
| The aim of a headlamp is not within limits laid down in the requirements | Lights and electrics | 2.9% |
What to check when buying a used Forfour
Based on where the Forfour fails more often than other cars, these are the checks worth making before you buy:
- Emissions and leaks: Look for oil and coolant leaks underneath, listen for exhaust blows on a cold start, and watch for smoke when revving. Repair guide
- Visibility: Check the windscreen for chips in the driver’s view, the wipers for smearing and the washers for working jets. Repair guide
- Tyres: Check tread across the whole width (uneven wear hints at alignment or suspension faults), and look for cuts, bulges and mismatched brands. Repair guide
Then check the individual car: its own MOT history will show whether it follows the pattern. A car with repeated advisories in the same weak area is more likely to fail its next test.
Check a specific Forfour
Enter the registration to see its full MOT history, mileage record and reliability score, compared with these figures.
Check a ForfourFrequently asked questions
What is the MOT pass rate for a Smart Mcc Forfour?
In 2025, 72% of Smart Mcc Forfour cars passed their MOT first time, across 22,239 tests. Cars of the same ages averaged 76%.
What do Smart Mcc Forfour cars most often fail their MOT on?
The most common failure items were: a suspension pin, bush or joint excessively worn (5.4% of tests); tyre tread depth not in accordance with the requirements (4.5% of tests); stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning (3.4% of tests).
Other Smart Mcc models
Smart Mcc Fortwo (79%). All Smart Mcc models
Source: DVSA anonymised MOT tests and results, 2025 (class 4 normal tests; first-time pass means passed with no faults fixed at the test). Contains public sector information licensed under the Open Government Licence v3.0.