Petrol Smart (Mcc) Forfour: MOT pass rate

79.1% of petrol Smart (Mcc) Forfours pass the MOT first time, measured across 22,112 DVSA tests on that fuel type alone. Average mileage at test was 45,301.

Petrol against the other Smart (Mcc) Forfour versions

Why the fuel type changes the number

Petrol cars avoid the DPF and emissions failures that catch diesels, and usually fail on the same consumables as any other car.

On the Smart (Mcc) Forfour specifically, electric is the strongest at 84.8%, and this petrol version sits 0.1 points above the 79% model average.

What it means if you are buying one

There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.

Mileage is part of the answer

The average petrol Smart (Mcc) Forfour had covered 45,301 miles at test, against 21,152 for the electric and 113,489 for the diesel. That is below average for a car this age, worth a mileage-consistency check since an unusually low reading is sometimes clocking rather than luck.

Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Smart (Mcc) Forfour page separate age from fuel if you want to isolate one.

Most common MOT failures on a petrol Smart (Mcc) Forfour

1. Lambda coefficient outside the default limits or the range specified by the manufacturer, 2.6% of tests (5.18x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 4.9% of tests (1.52x the national rate for this defect)
3. Wiper blade missing or obviously not clearing the windscreen, 2.6% of tests (1.38x the national rate for this defect)
4. Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.8% of tests (1.36x the national rate for this defect)
5. Brake disc or drum significantly and obviously worn, 1.1% of tests (1.35x the national rate for this defect)
6. A tyre cords visible or damaged, 2.1% of tests (1.23x the national rate for this defect)
7. Exhaust system leaking or insecure, 1.2% of tests (1.2x the national rate for this defect)
8. A suspension pin, bush or joint excessively worn, 5.1% of tests
9. A tyre seriously damaged, 2.7% of tests
10. a brake lining or pad worn below 1.5mm, 2% of tests

From 22,208 DVSA-tracked petrol Smart (Mcc) Forfour tests, 2024, split out from the Smart (Mcc) Forfour's other fuel types. DVSA testers marked 7.48% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.

Most common MOT advisories on a petrol Smart (Mcc) Forfour

Flagged but doesn't fail the car, a different list from the failures above.

1. Brake disc or drum significantly and obviously worn, 5.3% of tests (1.66x the national rate for this defect), also fails
2. A tyre seriously damaged, 18.9% of tests (1.23x the national rate for this defect), also fails
3. Tyre tread depth not in accordance with the requirements, 30.7% of tests, also fails
4. Brake disc or drum excessively weakened, insecure or fractured, 13.1% of tests
5. a brake lining or pad worn below 1.5mm, 6.6% of tests, also fails
6. A suspension pin, bush or joint excessively worn, 6.5% of tests, also fails
7. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 1.9% of tests
8. Number plate inscription missing or illegible, 1.6% of tests
9. Exhaust system leaking or insecure, 1.5% of tests, also fails
10. Lamp emitted colour, position or intensity not in accordance with the requirements, 1.4% of tests

From 22,208 DVSA-tracked petrol Smart (Mcc) Forfour tests, 2024.

Other Smart (Mcc) Forfour fuel types

• Electric Smart (Mcc) Forfour - 84.8%
• Diesel Smart (Mcc) Forfour - 62.3%

All Smart (Mcc) Forfour MOT data · Every model