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Model reliability
Smart (mcc) Forfour reliability
The Smart (mcc) Forfour fails its MOT about as often as most cars 6 to 10 years old: 25.4% of 15,681 tests failed in 2023, against 24.4% on average.
Up to 5 years old
16% failed their MOT
From 5,846 MOT tests of Smart (mcc) Forfours this age.
Where it does worse than other cars this age
Fails 2× as oftenWipers4.3% vs 2.1%
Fails 56% more oftenTyre tread depth2.5% vs 1.6%Fix about £90
Fails 64% more oftenWashers1.8% vs 1.1%
6 to 10 years old
25.4% failed their MOT
From 15,681 MOT tests of Smart (mcc) Forfours this age.
Where it does worse than other cars this age
Fails 2× as oftenExhaust emissions4.1% vs 2%Fix about £150
Fails 48% more oftenTyre tread depth3.7% vs 2.5%Fix about £90
Fails 83% more oftenWipers3.3% vs 1.8%
Fails 2× as oftenStop lamp3.3% vs 1.5%Fix about £30
Over 10 years old
43.2% failed their MOT
From 1,652 MOT tests of Smart (mcc) Forfours this age.
Where it does worse than other cars this age
Fails 74% more oftenHeadlamp aim9.4% vs 5.4%Fix about £30
Fails 2× as oftenHeadlamps8.3% vs 3.9%Fix about £30
Fails 36% more oftenBrake performance7.9% vs 5.8%
Fails 88% more oftenSteering linkage components4.5% vs 2.4%
Advised 4× as oftenHeadlamps14% vs 3.7%Fix about £30
Advised 34% more oftenTyre condition13.9% vs 10.4%Fix about £90
Advised 2× as oftenSprings13.3% vs 6.3%Fix about £150
Advised 62% more oftenRegistration plate lamp(s)8.4% vs 5.2%Fix about £30
Checking a Smart (mcc) Forfour before you buy
Look at the parts above at the viewing, and read the car’s own MOT history: advisories for the same parts suggest the problem is already starting. Sweep’s free check shows every MOT, advisory and mileage reading for a registration.
Source: DVSA anonymised MOT tests 2023 (Open Government Licence v3.0). Failure rates compare this model with all cars in the same age band. Fix prices are typical independent-garage estimates.