2015 · 9 years old at test · Petrol mostly

2015 SEAT Mii MOT pass rate and common faults

2,668 MOT tests in 2024. 77.2% passed first time, compared with 73.5% for all cars the same age.

105Above average
Passed first time77.2%
Failed or needed repairs22.8%
Typical mileage at test48,000

Most common reasons for failing

Share of all 2,668 tests where this item caused a failure.

  1. Position lamp: not working3.0%
  2. Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits2.1%
  3. Fuel cap/sealing device: ineffective2.1%
  4. Service brake performance: excessively binding2.0%
  5. Tread depth below requirements of 1.6mm1.7%
    63 marked dangerous
  6. Wipers: does not clear the windscreen effectively1.6%
  7. Suspension arms - pins and bushes: pin or bush excessively worn1.4%
  8. Catalyst emissions: carbon monoxide content after 2nd fast idle exceeds default limits1.2%
  9. Catalyst emissions: carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits1.1%

Problem areas

Failure items found per 100 tests, by part of the car.

  1. Lights & electrics9.9%
  2. Emissions & leaks8.6%
  3. Brakes8.3%
  4. Tyres4.2%
  5. Visibility (wipers, screen, mirrors)3.9%
  6. Body & chassis3.4%
  7. Suspension3.2%
  8. Seat belts & airbags0.3%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tyres - condition: has a tear, caused by separation or partial failure of its structure13.9%
  2. Tread depth below requirements of 1.6mm12.6%
  3. Brake discs: in such a condition that it is seriously weakened6.8%
  4. Suspension arms - pins and bushes: pin or bush excessively worn5.3%
  5. Brake pads: less than 1.5 mm thick4.3%

What this means if you are buying one

This model year does better than most cars its age, so it is a reasonable used buy on MOT record alone. Before buying, check the area that fails most: position lamp: not working. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

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Questions

What is the MOT pass rate for a 2015 SEAT Mii?

In 2024, 77.2% of 2015 SEAT Mii cars passed their MOT first time, across 2,668 tests. The average for all 9-year-old cars was 73.5%.

What are the most common MOT failures on a 2015 SEAT Mii?

The most common failure reasons were position lamp: not working; catalyst emissions: lambda reading after 2nd fast idle outside specified limits; fuel cap/sealing device: ineffective. The biggest problem area was lights & electrics.

Is the 2015 SEAT Mii reliable at MOT time?

Its MOT Rank score is 105, which is above average for a car of its age (100 means exactly average).