Smart (mcc) Forfour MOT pass rate: 78.0% (22,092 tests, 2025)

The Smart (mcc) Forfour passed 78.0% of its 22,092 MOT tests in 2025 — right on the UK average of 77.5%. The median tested example was 9 years old with 44,100 miles on the clock.

78.0%Pass rate (2025)

22,092MOT tests analysed

44,100 miMedian mileage at test

9 yrsMedian age at test

How the Forfour compares

Smart (mcc) Forfour

78.0%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Smart (mcc) average (all models)

77.4%

What fails most on the Smart (mcc) Forfour

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the Forfour:

#	System	Defects recorded	Share
1	Tyres	2,251	21.9%
2	Suspension	2,174	21.2%
3	Noise, emissions and leaks	1,612	15.7%
4	Lamps, reflectors and electrical equipment	1,479	14.4%
5	Brakes	1,090	10.6%
6	Visibility	927	9.0%

Pre-MOT checklist for Forfour owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
A blowing exhaust or visible smoke will fail; warm the engine fully before the test
Walk round with all lights on: one blown bulb is the most avoidable fail there is
Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible

Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

Forfour pass rate by registration year

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	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

Check a specific Forfour before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Smart (mcc) models

Fortwo83.8% pass rate · 22,387 tests Fortwo Coupe71.8% pass rate · 17,183 tests Fortwo Cabriolet73.8% pass rate · 3,838 tests City Coupe67.3% pass rate · 3,614 tests

FAQs

What is the MOT pass rate for a Smart (mcc) Forfour?

In 2025, 78.0% of 22,092 first MOT tests on the Smart (mcc) Forfour were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Forfour fail its MOT on most?

The biggest defect group is tyres (21.9% of its recorded defects), followed by suspension.

Is the Smart (mcc) Forfour reliable?

MOT pass rate is one lens on durability: at 78.0% it performs above the national average at a median age of 9 years and 44,100 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.