SEAT Miis built around 2018 fail their MOT a little less often than similar cars the same age.
Key figure
15% of MOT tests on SEAT Miis built around 2018 ended in a fail (retests included), against 18% for similar cars the same age.
Most common issue
The most common MOT issue on SEAT Miis built around 2018 involves the tyres.
Before you view it
The SEAT Mii's most common MOT issues, turned into things to ask about or look for.
Ask for the date and mileage of the last disc replacement; visually check for a deep wear lip and rust pitting on each disc.
Ask when the pads were last replaced and check the warning-light history.
Check tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Listen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.
Check the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
By build year
Fail rates have been steady over the last three years. Use the build-year guide below to separate newer build years from older ones.
Find your Mii's generation
Each card below is a different generation. Select your year and we'll highlight the match.
Not sure which one you're looking at?
Match your build year to its generation, then see the fail rates for those build years of the SEAT Mii.
See every build year for the SEAT MiiBy age
This chart combines every SEAT Mii ever sold. It's good for the big picture. For one generation, scroll up to the build-year cards.
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 13 years old.
Where it ranks
Three ways to compare the same cars, built around 2018 (7 years old). The fail rate is the share of MOT tests that ended in a fail. Retests count as tests, and 1st has the lowest fail rate. Only models with at least 500 MOT tests at this age are ranked. How we count fail rates
Against other SEAT models
2nd of 7
2nd lowest fail rate of 7 SEAT models with enough MOT tests to rank, at this age.
Close to the middle thirdAgainst other hatchbacks
31st of 84
31st lowest fail rate of 84 hatchbacks with enough MOT tests to rank, at this age.
In the middle thirdAgainst the UK average
15.1%
The share of this model's MOT tests at this age that ended in a fail.
Fails about as often as the average car this age (about 1 in 6 MOTs, 16.6%)All generations of this model
These issues come from 7-year-old SEAT Miis, every generation combined.
In order of the share of MOT tests that recorded each one
Tyre slightly damaged, cracking or perishing
Tyre worn close to the legal limit or worn on the edge
Suspension arm pin or bush worn, but not moving too much
Brake pads wearing thin
Brake disc worn, pitted or scored, but not seriously weakened
Based on 1,574 MOT tests on 7-year-old SEAT Miis, every generation combined.
All generations of this model
The pairs seen most often when an MOT on 7-year-old SEAT Miis notes problems with more than one part of the car.
Both were noted at the same test. That doesn't mean one caused the other.
Across 339 MOT tests on SEAT Mii cars built around 2018 (7 years old) where more than one part of the car was noted.
Still registered
How many of these are still registered in the UK, and what's been recalled across the model.
UK average for cars first registered in 2014 to 2015: 92% · About typical
The share still registered can reflect demand, the cost of repairs, exports, write-offs and how owners use the car. It isn't proof of how long the car lasts mechanically.
Source: DfT vehicle licensing statistics (VEH0124).
5 of the 6 SEAT Mii recalls cover cars built in these years.
Top concerns
For the exact car, check GOV.UK's recall checker with the number plate.
Like-for-like
Same body type, tested at the same age
No clear edge over the SEAT Mii on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate, share still registered and recalls only.
15,657 MOT tests on cars built around 2018
Same body type, tested at the same age
No clear edge over the SEAT Mii on these figures.
3 critical recall campaigns matching this model/build period.
6,861 MOT tests on cars built around 2018
Same body type, tested at the same age
Lower fail rate: 13.0%, against 15.1% for the SEAT Mii, both built around 2018.
25,028 MOT tests on cars built around 2018
Same body type, tested at the same age
Fewer dangerous faults: 2.4%, against 3.2% for the SEAT Mii.
5,662 MOT tests on cars built around 2018
Common questions
Built around 2018 (7 years old), the SEAT Mii across all generations combined fails MOTs at about the rate typical for this age. It has the 2nd lowest fail rate of 7 SEAT models with enough MOT tests to rank, at this age. This is based on 1,574 7-year-old MOT tests from DVSA data. Each retest counts as a test.
