At a Glance
The Seat Mii has 21 identified problems that occur more often than the UK average, with Wiper blades deteriorated being the most reported. Tyres & Wheels is the most common MOT failure category. The most serious issue flagged is Exhaust system fault, rated as dangerous. Based on 128K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Seat Mii — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Seat Mii MOT Pass Rate
Across 128K MOT tests from DVSA data, the Seat Mii (2011–2021) has a fail rate of 18.9%.
UK average fail rate (2011–2021): 35.4%
Common Seat Mii Problems
Owner-submitted reports plus patterns we've identified across 559 million UK MOT tests. Each MOT-derived item below — whether tagged as a Problem, Wear & Tear or Consumable — shows up noticeably more often on this generation than across the UK fleet, which is why it's here. Owner reports are pinned to the top by default; use the sort and filter pills below to view a specific tier or change the order.
Wiper blades deteriorated
5,765
occurrences
Brake performance below minimum
3,794
occurrences
Airbag warning light on
2,389
occurrences
Position lamp not working
2,277
occurrences
Windscreen washer not working
2,015
occurrences
Tell Us About Your Problem
Help other Seat Mii owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Seat Mii owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Seat Mii, grouped by the mileage they typically appear at.
280 distinct problems · 115,211 total occurrences in current filter
Includes Petrol 1.0L
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Frequently Asked Questions
What are the most common Seat Mii problems?
Based on DVSA MOT data for the Seat Mii Mii (2011–2021), we have identified 21 common problems. The most frequently reported is "Wiper blades deteriorated". Tyres & Wheels is the most common MOT failure category.
How reliable is the Seat Mii?
This generation has 128K MOT tests on record with a 18.9% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Seat Mii?
There are 131 distinct MOT failure types recorded for the Mii (2011–2021), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Seat Mii?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Seat Mii owners spot problems early. All submissions are reviewed before being added to the public database.
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