carpeep

SEAT Mii, Buying guide, MOT record, UK numbers and recalls

18,171 SEAT Miis are licensed in the UK. In 2025 they passed 75.9% of initial MOT tests, 3.6 points above the 72.3% UK average.

Looking at a specific Mii? Check its finance, write-off, stolen, mileage and keeper history. £15, no account needed.

SEAT Mii at the MOT

75.9% of 18,638 initial tests passed in 2025, ranking the Mii 252nd of 575 models. SEAT Miis aged 3 to 5 years passed 86.5% of MOT tests in 2025; for examples aged 11 years and over that fell to 70.7%.

First-time pass rate, 2025

Share of initial tests passed, retests excluded.

  • SEAT Mii75.9%
  • All SEAT modelsThe Mii is 1.9 pts ahead74%
  • All cars72.3%

Pass rate by age at test

SEAT Mii tests in 2025.

  • 3 to 5 years2,215 tests86.5%
  • 6 to 10 years9,922 tests77%
  • 11 years and over6,501 tests70.7%

Where Miis fail

Share of all failure items recorded on SEAT Mii tests in 2025.

  • Lamps, reflectors and electrical equipment25.7%
  • Brakes20.3%
  • Tyres11.9%
  • Suspension11.9%
  • Noise, emissions and leaks11.6%

The items testers recorded most often were position lamp not working (5.3%), service brake performance excessively binding (4.9%) and headlamp aim too low (4.7%).

The MOT page lists every common Mii MOT failure. For one car's own results and advisories, run a free MOT history check.

Full SEAT Mii MOT record

What to look at on a viewing

The Mii's most common failure areas, and what a tester checks in each.

  1. Lamps, reflectors and electrical equipment

    Walk round with every light on: headlights, brake lights, indicators, fog lights and the number plate lamp. Check no warning lights stay on after starting.25.7% of Mii failure items

  2. Brakes

    Make sure the pedal feels firm, the car stops in a straight line, the handbrake holds on a slope and no brake warning light is showing.20.3% of Mii failure items

  3. Tyres

    Check tread depth across the full width of every tyre (the legal minimum is 1.6mm), and look for cuts, bulges and uneven wear.11.9% of Mii failure items

SEAT Miis in the UK

18,171 were licensed at the end of June 2026. The number licensed has grown 107% since the end of 2014, although it peaked at 18,879 at the end of 2021.

Change since 2014
+107%from 8,763 licensed
Typical year of first use
2015half of those licensed at the end of 2025 were first used in 2015 or earlier
First registered in 2025
1against 2,799 in 2015
Declared off the road
2701.5% of those registered, under SORN

Licensed SEAT Miis since 2014

Licensed at each year end and in the latest quarter.

Show the figures
DateLicensed
End of 20148,763
End of 201511,363
End of 201613,610
End of 201715,049
End of 201816,224
End of 201917,536
End of 202017,642
End of 202118,879
End of 202218,711
End of 202318,584
End of 202418,386
End of 202518,199
End of June 202618,171

How old they are

Licensed SEAT Miis by year of first use.

  • Licensed at the end of 2025
  • First registered that year
Show the figures
First usedLicensed, end 2025First registered that year
20211,0331,186
2020277306
20191,2671,330
20181,2401,304
20171,4371,530
20162,1722,321
20152,5852,799
20143,071
20133,373
20121,694

2,585 Miis first used in 2015 were still licensed at the end of 2025, roughly 92% of the 2,799 first registered that year.

Mii engines and fuel

1.0 litre engines made up 93% of SEAT Mii MOT tests in 2025. Petrol accounts for 93% of licensed Miis and battery electric for 7.3%. Electric examples were 7.3% of tests.

Fuel type, licensed Miis

DfT licensing statistics, June 2026.

FuelLicensedShare
Petrol16,83893%
Battery electric1,3327%
Gas1<0.1%

SEAT Mii recalls

5 DVSA safety recalls launched from 1992 to October 2026 name the SEAT Mii. Each covers vehicles built in a set period, so a recall does not mean every Mii is affected.

  1. Nov 2020 R/2020/348

    Damaged battery cells could have been installed in the high voltage battery which could lead to a thermail overload

    Miis built May 2020 · 2 vehicles across the whole recall

    Defect and remedy
    Defect
    On affected vehicles damaged battery cells could have been installed in the high voltage battery which could lead to a thermal overload.
    Remedy
    Replace the batteries.

  2. Dec 2017 R/2018/005

    Towing eye may be defetcive

    Miis built Oct 2015 to Oct 2017 · 3,697 vehicles across the whole recall

    Defect and remedy
    Defect
    The welding of the towing eye in the vehicle tool kit may not be fail-proof and may detach if the vehicle is towed.
    Remedy
    On affected vehicles replace the towing eye with an improved version.

  3. Aug 2016 R/2016/180

    Manual child lock may disengage without warning

    Miis built Nov 2015 to Apr 2016 · 1,334 vehicles across the whole recall

    Defect and remedy
    Defect
    The child lock can disengage without the driver knowing and the door can again be opened from the inside. If children leave the car unnoticed and run into the road there is a risk of accident.
    Remedy
    Recall the vehicles that are likely to be affected and check the function of the manual child lock. If necessary the door lock/s will be replaced.

  4. Sep 2015 R/2015/175

    Driver's airbag may not deploy correctly

    Miis built Jun 2013 · 10 vehicles across the whole recall

    Defect and remedy
    Defect
    The driver's air bag may not correctly deploy because of a faulty welding process on the gas generator. In an air bag deployment the effect of the faulty welding process is to limit the protection and thereby increase the risk of injury.
    Remedy
    Recall the vehicles that are likely to be affected and replace the driver's air bag.

  5. May 2013 R/2013/058

    Side airbag diagnostic function disabled

    Miis built Jan 2013 to Mar 2013 · 872 vehicles across the whole recall

    Defect and remedy
    Defect
    Some vehicles may be fitted with airbag control units with incorrect parameters programmed. On these vehicles the diagnostic function for the side crash sensors is deactivated resulting in potential faults not being recognised and the airbag warning not illuminating.
    Remedy
    Recall the vehicles that are likely to be affected to re programme the airbag control unit.
How to check a specific Mii for recalls

Other SEAT models

The most-tested SEAT models in 2025, against the Mii's 75.9% MOT pass rate.

All 11 SEAT models

SEAT Mii FAQs

How many SEAT Miis are there in the UK?

18,171 SEAT Miis were licensed in the UK at the end of June 2026, with a further 270 declared off the road (SORN), according to DfT vehicle licensing statistics.

Is the SEAT Mii reliable?

MOT data does not measure reliability. It records whether a car met the roadworthiness standard on the day of its test. What it does show is a 75.9% first-time pass rate for the SEAT Mii across 18,638 tests in 2025, above the 72.3% average for all cars.

Has the SEAT Mii had any recalls?

5 DVSA safety recalls launched from 1992 to October 2026 name the SEAT Mii. The most recent was published in November 2020. A recall applies to vehicles built in a set period, so check a specific car on the GOV.UK vehicle recall checker.

What should I check before buying a used SEAT Mii?

On the car itself, start with the areas it most often fails on: lamps, reflectors and electrical equipment, brakes and tyres. Then check the individual car's own records. Outstanding finance, insurance write-offs and police stolen markers are not part of the MOT record, so they take a history check.

How do I check a SEAT Mii's history?

Enter the registration of the specific car. A Carpeep car history check reports outstanding finance, write-off category, stolen markers, mileage history, previous keepers, MOT and tax status, import and export markers and scrapped status in one £15 report.

Already found a Mii?

Check its finance, write-off, theft, mileage and keeper history with a £15 vehicle history report.

Across the 1,548 vehicles of every make Carpeep has checked since November 2025, 19% had outstanding finance recorded and 13% an insurance write-off. More on the SEAT history check. To confirm a car's identity, see the SEAT VIN check.

  • Outstanding finance
  • Write-off records
  • Stolen markers
  • Mileage history
  • Previous keepers

MOT figures are aggregated from the DVSA MOT Anonymised data set for 2025 (class 4 initial tests, retests excluded), which also gives the engine sizes. Licensed, SORN, fuel and registration figures are from the Department for Transport vehicle licensing statistics (VEH0120, VEH0124, VEH0160). Recalls are from the DVSA vehicle recalls data, with recalls launched up to October 2026. Government data is used under the Open Government Licence v3.0. MOT results describe roadworthiness at test, not mechanical reliability. History-check findings are anonymous counts from reports bought on Carpeep, each vehicle counted once, and are published only where at least 100 vehicles returned an answer.