Seat Mii
Reliability, running costs, and MOT data across 8 years from 27,739 real MOT tests.
Avg Pass Rate
86%
Total Tests
27,739
Best Year
2019 (93%)
Years Covered
8
About the Seat Mii
The Seat Mii has been tested 27,739 times in 2026 MOT data across 8 model years (2012 to 2019), with an average pass rate of 86%. That's slightly above the national average of 82%. Available as petrol.
Best and Worst Years
The 2019 model is the most reliable with a 93% pass rate from 1,976 tests. The 2012 model has the lowest at 81%. The 12 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
Newer SEAT MIIs show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Mileage Across Years
The oldest model in our data (2012) averages 70,829 miles, while the newest (2019) averages 27,272 miles.
Estimated Running Costs
Based on 7,400 miles/year, current fuel prices, and MOT pass rate data. Insurance not included.
Full 2019 detailsHow reliable is the Seat Mii?
Seat Mii by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
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