Is the Smart Forfour ULEZ Compliant?
Based on 24,602 MOT tests, around 92% of Smart Forfours still on the road are likely to meet London's ULEZ standards, and about 2% are likely to be charged. For the remaining 6%, it depends on the exact Euro standard or month of registration.
The fuel mix matters: tested cars were 97% petrol. Every petrol Forfour in the data (2004 onwards) is likely to be compliant.
- Likely compliant
- 92%
- Likely charged
- 2%
- Depends on the car
- 6%
- MOT tests analysed
- 24,602
Check a specific Forfour
Year and fuel type are a guide. Enter the registration to check that car's own record.
Forfour ULEZ compliance by year and fuel
Estimated from the year of first registration. Numbers show how many Forfours of each type were MOT tested, as a guide to how common they are.
| First registered | Petrol | Diesel | Electric |
|---|---|---|---|
| 2019 | Likely compliant1,794 tested | – | Compliant161 tested |
| 2018 | Likely compliant3,698 tested | – | Compliant165 tested |
| 2017 | Likely compliant4,736 tested | – | Compliant60 tested |
| 2016 | Likely compliant5,283 tested | – | – |
| 2015 | Likely compliant5,549 tested | – | – |
| 2007 | Likely compliant125 tested | Likely charged1 tested | – |
| 2006 | Likely compliant1,104 tested | Likely charged127 tested | – |
| 2005 | Check Euro standard1,108 tested | Likely charged188 tested | – |
| 2004 | Check Euro standard382 tested | Likely charged69 tested | – |
How ULEZ rules apply to the Forfour
Cars that miss the standard pay £12.50 for each day they're driven in the zone. Petrol and petrol-hybrid cars need Euro 4 (most from 2006), while diesels need Euro 6 (most from September 2015). Electric versions always comply.
- Petrol (97% of Forfours tested): every year in our data is likely to comply.
- Diesel (2% of Forfours tested): most cars in our data are from years unlikely to comply.
- Electric (2% of Forfours tested): always compliant.
Thinking of buying one? Check how Forfours fare at the MOT too: see the Smart Forfour MOT failure rate.
Buying a used Smart Forfour for London: what the MOT data shows
The Smart Forfours in this data were first registered between 2004 and 2019. 2015 was the most common year, with 5,549 tests (23% of the total), and half were registered in 2016 or later.
Forfours from likely-compliant years passed their MOT first time 76% of the time, at an average of 39,065 miles. Older ones likely to be charged passed 56% of the time with 97,860 miles on average, so a compliant car is usually the more reliable buy as well as the cheaper one to drive in London.
On a budget, the oldest petrol Forfours likely to comply are from 2006. 1,104 of them were tested; 2006 cars passed first time 57% of the time and averaged 95,122 miles. Check the Euro standard on the V5C before you buy one from around then.
Whichever year you choose, check the Forfour's weak spots. The most common MOT failures were lights and electrics: "not working" (4.0% of tests); visibility: "does not clear the windscreen effectively" (3.6%); tyres: "tread depth below requirements of 1.6mm" (3.0%). The most frequent advisory was "tread depth below requirements of 1.6mm", on 16.1% of tests.
Overall, 74% of Forfours passed first time, slightly above the 71% average for all cars, and they had covered 43,610 miles on average, fewer than the 73,145-mile average.
ULEZ compliance for other models
Other Smart models
About this data
Based on 24,602 first MOT tests of the Smart Forfour carried out in 2023.
Source: DVSA anonymised MOT test data (contains public sector information licensed under the Open Government Licence v3.0). First attempts on cars only; “pass rate” means passing first time. Averages cover all 32,735,164 cars tested (71% passed), and years with under 50 tests are hidden.
ULEZ results are estimates from fuel type and year of first registration. Transport for London makes the final decision.
Learn more about how our data works.
Frequently asked questions
What 24,602 MOT tests say about the Smart Forfour and London's ULEZ.
Is the Smart Forfour ULEZ compliant?
In our data about 92% of Forfours on the road are likely compliant and 2% likely to be charged. Petrol and petrol-hybrid cars need Euro 4 (most from 2006), while diesels need Euro 6 (most from September 2015).
Which petrol Forfour years are ULEZ compliant?
Petrol Forfours first registered from 2006 are likely compliant. Some earlier cars meet Euro 4 too, so check the exact vehicle.
Is a diesel Forfour ULEZ compliant?
Only if it meets Euro 6, which generally means first registered from September 2015. Diesel Forfours from 2007 or earlier are likely to be charged.
How can I check if a specific Forfour is ULEZ compliant?
Enter its registration in our free ULEZ check, which uses the vehicle's DVLA record. Always confirm with TfL before relying on it.
Related guides
- ULEZ · 6 min readULEZ explained: which cars are compliant and what it costsSince August 2023 the ULEZ covers every London borough. Which cars comply, what the daily charge costs if yours doesn't, and what you can do about it.Read the guide
- MOT · 6 min readPre-MOT checklist: 20 things to check yourself before the testTwenty quick checks, grouped by area, that you can do on your driveway in under half an hour. No tools beyond a coin and a helper needed for most.Read the guide
- Buying a used car · 5 min readUsed car buying checklist: 25 checks before you payA step-by-step checklist for buying a used car, from the checks you can do at home to what to look at on the day and the paperwork you need.Read the guide
Is your Forfour ULEZ compliant?
Enter the registration for a check based on that car's own DVLA record.