2012 SEAT Mii · 5,742 MOT tests
2012 SEAT Mii reliability
2012 SEAT Miis fail 27.8% of first MOT tests, 6% fewer MOT fails than the average car its age and mileage, ranking 2 of 8 Mii years (5,742 DVSA tests, 2022 to 2024).
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- first-time fail rate (all SEAT Miis: 21.4%)
- 27.8%
- first-time fail rate (all SEAT Miis: 21.4%)
- fails than cars of the same age and mileage
- 6% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 10
- 61,737
- typical miles at its MOT, aged about 10
- MOT tests, 2022 to 2024
- 5,742
- MOT tests, 2022 to 2024
Year on year
2012 against the years either side
- 2013 cars: 4% fewer MOT fails than the average car its age (the 2012 car does better)
- Weak spot: seat belts and airbags, 6% of tests fail here (793% above cars of the same age and mileage).
- Strong point: suspension, 65% fewer fails than comparable cars.
- Plates: a 2012 car carries a 61 plate (January–February 2012), or a 12 plate (March–August 2012), or a 62 plate (September–December 2012).
Common problems
What fails on a 2012 SEAT Mii
Fail rate by area
- Lights and electrics9.7%
- Brakes7.7%
- Seat belts and airbags6%
- Windscreen, wipers and mirrors4.6%
- Tyres4.4%
- Body, chassis and structure3.7%
- Suspension3.4%
Average for cars of the same age and mileage
Top failures
Airbag warning lamp shows fault 5.07%
A lit airbag warning means the airbag system may not deploy in a crash, so it needs diagnosing and repairing.
Service brake excessively binding 2.63%
A brake that drags when released can overheat, wear quickly and waste fuel, so it needs prompt inspection.
Tyre tread below 1.6mm 2.06%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Registration plate lamp not working 2.02%
A dark number plate lamp makes the plate hard to read at night, which is illegal and must be fixed.
Wiper blade not clearing windscreen 1.95%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Headlamp aim set too low 1.52%
Headlamps aimed too low light the road poorly and reduce the driver's view ahead, especially at night.
Common advisories
Tyre worn close to legal limit (12.85%) · Tyre slightly damaged or cracking (10.47%) · Brake disc pitted or scored (6.72%) · Suspension arm pin/bush showing wear (3.87%) · Brake pads wearing thin (3.64%) · Slight play in steering rack joints (3.57%)
Is a 2012 SEAT Mii reliable?
2012 SEAT Miis fail 27.8% of first MOT tests, 6% fewer MOT fails than the average car its age and mileage, ranking 2 of 8 Mii years (5,742 DVSA tests, 2022 to 2024).
What fails on a 2012 SEAT Mii MOT?
Most often airbag warning lamp shows fault (5.07% of tests), service brake excessively binding (2.63% of tests), tyre tread below 1.6mm (2.06% of tests).
How many miles should a 2012 SEAT Mii have done?
At its MOT aged about 10, a typical 2012 SEAT Mii shows 61,737 miles. Much higher or lower is worth asking about.
What plate is a 2012 car?
A car first registered in 2012 carries a 61 plate (January–February 2012), or a 12 plate (March–August 2012), or a 62 plate (September–December 2012).
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