SEAT Mii

Reliability, estimated running costs, and MOT data across 8 model years from 27,739 MOT tests in 2024.

Avg Pass Rate

86%

Total Tests

27,739

Highest Pass Rate

2019 (93%)

Years Covered

About the SEAT Mii

The SEAT Mii was MOT tested 27,739 times in 2024 (DVSA data, retests included) across 8 model years (2012 to 2019), with an average pass rate of 86%. That's slightly above the average of 82% across all models in our data. Our records list petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2019 model has the highest pass rate at 93% from 1,976 tests. The 2012 model has the lowest at 81%. The 12 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer SEAT Miis pass their MOT more often than older ones, by 6 percentage points on average, which is mostly down to age and wear.

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

Fuel (Petrol, 999cc)

£1,175

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£1,630

Per month£136/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2019 details

How reliable is the SEAT Mii?

vs average of all models+4% (82% avg)

vs SEAT brand average+1% (85% avg)

Best to worst year spread12 percentage points

Reliability trendImproving over years

SEAT Mii by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2019	93%	1,976	27,272 mi
2018	89%	1,975	33,651 mi
2017	87%	2,338	39,917 mi
2016	86%	3,557	46,587 mi
2015	85%	4,201	52,581 mi
2014	84%	5,035	59,614 mi
2013	82%	5,782	66,168 mi
2012	81%	2,875	70,829 mi

Questions about the SEAT Mii

Is the SEAT Mii reliable?

Across its 8 model years in our data (2012 to 2019), the SEAT Mii averages an 86% MOT pass rate, from 27,739 tests (DVSA MOT data for tests in 2024, retests included). That's 4 points above the average of 82% across all models in the same data. The 2019 model has the highest pass rate of the years with at least 100 tests, at 93%.

Which year SEAT Mii has the best MOT pass rate?

Of the years with at least 100 tests, the 2019 SEAT Mii has the highest MOT pass rate at 93%, while the 2012 model has the lowest at 81%, a 12 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.