2021 SEAT Mii MOT pass rate and common faults
MOT tests in 2025, published 22 Jun 2026. DVSA publishes a new year each summer.
1,085 SEAT Mii cars first used in 2021 had an MOT in 2025, at about 4 years old, and 87.3% passed first time. That is in line with the 87.2% for all cars first used in 2021.
The year is when the car was first used, as on its V5C log book, not the model year.
Common failures
The share of 2021 SEAT Mii cars tested that failed on, or had fixed at the station, each item. Worth checking before the MOT or before you buy.
| Item | Value |
|---|---|
| Condition: has a bulge, caused by separation or partial failure of its structure | 2.9% |
| Condition: has a cut in excess of the requirements deep enough to reach the ply or cords | 1.8% |
| Washers: provides insufficient washer liquid | 1.1% |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps | 1.0% |
| Headlamp aim: too low | 1.0% |
| Linkage ball joints: ball joint excessively worn | 0.7% |
Source: DVSA, tests in 2025, published 22 June 2026.
Common advisories
Things the tester noticed that were not bad enough to fail. They often turn into failures later. What advisories mean for the next MOT.
| Item | Value |
|---|---|
| Condition: slightly damaged/cracking or perishing | 13.0% |
| Tread depth: worn close to legal limit/worn on edge | 10.4% |
| Brake discs: worn, pitted or scored, but not seriously weakened | 3.5% |
| Nail in tyre | 2.6% |
| Condition: has a cut but not deep enough to reach the ply or cords | 1.7% |
| Child Seat fitted not allowing full inspection of adult belt | 1.4% |
Source: DVSA, tests in 2025, published 22 June 2026.
Where the faults are
The share of cars tested with at least one failure or fix in each part of the car.
| Item | Value |
|---|---|
| Tyres | 5.9% |
| Lamps, reflectors and electrical equipment | 3.6% |
| Visibility | 1.8% |
| Brakes | 1.8% |
| Suspension | 1.5% |
| Identification of the vehicle | 0.3% |
Source: DVSA, tests in 2025, published 22 June 2026.
Typical mileage
Recorded mileage at the MOT. A car well above this range has done more work than most; one far below is worth a closer look at its MOT history.
| Cars | Low | Typical | High |
|---|---|---|---|
| 1,081 | 16,300 | 22,900 miles | 30,300 |
The middle half of cars fall between the low and high figures. Source: DVSA, tests in 2025, published 22 June 2026.
Other SEAT Mii years
| Year | Tests | Passed first time | All cars that year |
|---|---|---|---|
| 2021 | 1,085 | 87.3% | 87.2% |
| 2019 | 1,304 | 84.0% | 83.5% |
| 2018 | 1,277 | 82.6% | 80.9% |
| 2017 | 1,471 | 80.1% | 78.2% |
| 2016 | 2,238 | 74.1% | 74.9% |
| 2015 | 2,681 | 73.8% | 71.9% |
| 2014 | 3,081 | 75.3% | 68.6% |
| 2013 | 3,491 | 70.4% | 65.8% |
| 2012 | 1,729 | 70.2% | 63.5% |
- SEAT Mii MOT results for all years.
- Years with fewer than 1,000 tests have no page of their own. How these figures are worked out.
Checking one car?
These figures describe groups of cars. A vehicle history report shows the full MOT history, mileage, outstanding finance, write-offs and stolen records for one registration.
Figures from the DVSA anonymised MOT testing data for MOT tests in 2025, published by the Driver and Vehicle Standards Agency. Analysis by Motoring Insider. Contains public sector information licensed under the Open Government Licence v3.0. How we work out these figures.
Every dataset we use is listed on our data sources page, with the credit lines on our attribution page.