2014 SEAT Mii MOT pass rate, common failures & what to check
In 2025, 75.3% of SEAT Miis first used in 2014 passed their MOT first time, against 68.6% for all cars first used in 2014. Across 9,323 Mii first tests from 2023 to 2025, the most common failure areas were lamps and electrical equipment, brakes and tyres.
This page analyses first MOT tests for SEAT Miis first used in 2014 (all trims grouped): 2021 to 2025 for the pass-rate trend, and 2023 to 2025 for the failure and advisory analysis — plus what is worth checking before you buy one.
Data: DVSA anonymised MOT tests to December 2025 · Calculated by SortedCars · Updated October 2026
How the 2014 SEAT Mii MOT pass rate has changed
Share of first tests passed in each year, Miis first used in 2014 against all cars first used in 2014 (any make or fuel; not adjusted for mileage, fuel or use). In 2025 the Mii figure was 6.7 points higher.
View this chart as a table
| Test year | 2014 Mii | All cars first used 2014 | Mii first tests |
|---|---|---|---|
| 2021 | 82.7% | 76.3% | 3,104 |
| 2022 | 82.6% | 74.1% | 3,129 |
| 2023 | 78.6% | 71.7% | 3,107 |
| 2024 | 76.0% | 69.9% | 3,135 |
| 2025 | 75.3% | 68.6% | 3,081 |
Common 2014 SEAT Mii MOT failures
Share of the 2,179 failed first tests (2023–2025) with at least one failure in each area. A test can fail in more than one area, so the shares add up to more than 100%.
Most common failure items
| DVSA failure item | Share of failed first tests | Tests |
|---|---|---|
| Service brake performance: excessively binding | 9.2% | 200 |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps | 7.9% | 173 |
| Wipers: does not clear the windscreen effectively | 7.8% | 169 |
| Tread depth: below requirements of 1.6mm | 7.6% | 165 |
| Fuel cap/sealing device: ineffective | 6.9% | 150 |
Item names are DVSA’s own wording. 2023–2025 combined.
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Typical repair costs for common MOT failures
Typical UK garage prices for the job, not for a Mii in particular, and not a quote.
| Failure item | Typical job | Typical UK price | Usual range |
|---|---|---|---|
| Service brake performance: excessively binding | Brake caliper repair | £180 | £150–£220 |
From published UK repair-cost guides, checked September 2026. Only jobs with a published typical price are shown.
What to check on a 2014 SEAT Mii before buying
The three areas where failed first tests most often had a fault, 2023–2025.
- Lamps and electrics. Ask someone to watch while you work the brake lights, indicators, sidelights, dipped and main beam, and the number-plate lamps.
- Brakes. Worth looking at the discs and pads through the wheel spokes for scoring and a worn lip, and noticing on the test drive whether the car pulls to one side or the pedal feels long.
- Tyres. Worth checking the tread depth across the whole width of each tyre, and the sidewalls for cuts, cracks and bulges.
Common 2014 SEAT Mii MOT advisories
Advisories are points the tester noted that did not fail the car. Most common on 2014 Miis, as a share of all 9,323 first tests, 2023–2025.
| DVSA advisory item | Share of first tests | Tests |
|---|---|---|
| Tread depth: worn close to legal limit/worn on edge | 12.9% | 1,202 |
| Tyre condition: slightly damaged/cracking or perishing | 12.5% | 1,165 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 7.5% | 702 |
| Suspension arm pins and bushes: pin or bush worn but not resulting in excessive movement | 5.7% | 527 |
| Brake pads: wearing thin | 4.5% | 418 |
Questions about the 2014 SEAT Mii MOT
What is the MOT pass rate of a 2014 SEAT Mii?
In 2025, 75.3% of Miis first used in 2014 passed their MOT first time, against 68.6% for all cars first used in 2014. A car fixed during the test counts as a fail.
What does a 2014 Mii most often fail its MOT on?
Lamps and electrical equipment (in 33.5% of failed first tests, 2023–2025), brakes (28.5%) and tyres (16.8%). The single most common item was “Service brake performance: excessively binding” (9.2%).
How often does a 2014 SEAT Mii fail its MOT?
In 2025, 24.7% of first tests on Miis first used in 2014 did not pass first time: 19.1% failed, and a further 5.6% had a fault fixed during the test (counted as a fail here). Across 2023–2025, 2,179 of 9,323 first tests did not pass first time.
What are the most common 2014 SEAT Mii MOT advisories?
“Tread depth: worn close to legal limit/worn on edge” (on 12.9% of first tests, 2023–2025), “Tyre condition: slightly damaged/cracking or perishing” (12.5%), “Brake discs: worn, pitted or scored, but not seriously weakened” (7.5%), “Suspension arm pins and bushes: pin or bush worn but not resulting in excessive movement” (5.7%) and “Brake pads: wearing thin” (4.5%).
Is a 2014 SEAT Mii reliable?
An MOT pass rate shows what failed at the test, not how reliable a car is. For this group of cars the first-time pass rate went from 82.7% in 2021 to 75.3% in 2025. For one particular car, its own MOT history matters more than the average.
Other cars first used in 2014
The most-tested cars from the same year. Each page uses the same method.
2014 Ford Fiesta MOT statistics · 2014 Vauxhall Corsa MOT statistics · 2014 Ford Focus MOT statistics · 2014 Volkswagen Golf MOT statistics · 2014 Vauxhall Astra MOT statistics
Checking a specific 2014 Mii?
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