Smart Forfour MOT pass rate and common faults
MOT tests in 2025, published 22 Jun 2026. DVSA publishes a new year each summer.
25,038 Smart Forfour cars had an MOT in 2025 and 72.7% passed first time. That is below what cars of the same ages scored (76.0%).
Find the year your car was first registered below, then check the faults it is most likely to fail on.
Pass rate by year
Each year's first-time pass rate, with a tick for all cars first used that year. Years with fewer than 300 tests, and cars over 20 years old, are left out. Years with 1,000 or more tests link to a page of their own, with that year's common faults.
| Item | Smart Forfour | All cars that year |
|---|---|---|
| 2022 | 88.6% | 88.5% |
| 2021 | 82.8% | 87.2% |
| 2020 | 84.5% | 86.0% |
| 2019 | 80.9% | 83.5% |
| 2018 | 79.5% | 80.9% |
| 2017 | 75.8% | 78.2% |
| 2016 | 70.6% | 74.9% |
| 2015 | 66.1% | 71.9% |
| 2006 | 55.4% | 57.0% |
| 2005 | 59.2% | 57.6% |
Source: DVSA, tests in 2025, published 22 June 2026.
Common failures
The share of all Smart Forfour cars tested that failed on, or had fixed at the station, each item. Worth checking before the MOT or before you buy.
| Item | Value |
|---|---|
| Wipers: does not clear the windscreen effectively | 3.1% |
| Ball joint: ball joint excessively worn | 3.1% |
| Stop lamp: not working | 3.0% |
| Tread depth: tread depth below requirements of 1.6mm | 3.0% |
| Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits | 2.8% |
| Coil spring: fractured or broken | 1.9% |
| Washers: provides insufficient washer liquid | 1.8% |
| Malfunction indicator lamp: inoperative or indicates a malfunction | 1.7% |
Source: DVSA, tests in 2025, published 22 June 2026.
Common advisories
Advisories are things the tester noticed that were not bad enough to fail. They often turn into failures later. What advisories mean for the next MOT.
| Item | Value |
|---|---|
| Tread depth: worn close to legal limit/worn on edge | 18.5% |
| Brake discs: worn, pitted or scored, but not seriously weakened | 11.2% |
| Condition: slightly damaged/cracking or perishing | 10.1% |
| Brake pads: wearing thin | 5.4% |
| Brake discs: worn, but not excessively | 3.8% |
| Pins and bushes: pin or bush worn but not resulting in excessive movement | 2.8% |
| Engine oil leaks: leak, but not excessive | 2.4% |
| Exhaust system: has a minor leak of exhaust gases | 2.0% |
Source: DVSA, tests in 2025, published 22 June 2026.
Typical mileage
Recorded mileage at the MOT. A car well above the range for its age has done more work than most; one far below is worth a closer look at its MOT history.
| Age | Low | Typical | High | All cars, typical |
|---|---|---|---|---|
| 3-5 years | 8,700 | 14,000 miles | 21,100 | 30,900 |
| 6-8 years | 23,800 | 36,000 miles | 50,200 | 51,800 |
| 9-11 years | 36,700 | 50,100 miles | 65,500 | 73,500 |
| 18-20 years | 71,900 | 94,700 miles | 119,500 | 106,700 |
| 21+ years | 80,700 | 105,500 miles | 132,300 | 99,200 |
The middle half of cars fall between the low and high figures. Source: DVSA, tests in 2025, published 22 June 2026.
Reliability and recalls
- Smart Forfour reliability score, adjusted for age and ranked against other models.
- Check if a Smart has been recalled on GOV.UK, using its registration.
- All Smart models and the Smart vehicle history check.
Checking one car?
These figures describe groups of cars. A vehicle history report shows the full MOT history, mileage, outstanding finance, write-offs and stolen records for one registration.
Figures from the DVSA anonymised MOT testing data for MOT tests in 2025, published by the Driver and Vehicle Standards Agency. Analysis by Motoring Insider. Contains public sector information licensed under the Open Government Licence v3.0. How we work out these figures.
Every dataset we use is listed on our data sources page, with the credit lines on our attribution page.