2020 MG 3 · 4,224 MOT tests
2020 MG 3 reliability
2020 MG 3s fail 15.7% of first MOT tests, 47% more MOT fails than the average car its age and mileage, ranking 4 of 7 3 years (4,224 DVSA tests, 2022 to 2024).
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- first-time fail rate (all MG 3s: 23.4%)
- 15.7%
- first-time fail rate (all MG 3s: 23.4%)
- fails than cars of the same age and mileage
- 47% more
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 20,246
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 4,224
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2019 cars: 48% more MOT fails than the average car its age (the 2020 car does better)
- 2021 cars: 66% more MOT fails than the average car its age (the 2020 car does better)
- Weak spot: lights and electrics, 6.5% of tests fail here (178% above cars of the same age and mileage).
- Strong point: windscreen, wipers and mirrors, 55% fewer fails than comparable cars.
- Plates: a 2020 car carries a 69 plate (January–February 2020), or a 20 plate (March–August 2020), or a 70 plate (September–December 2020).
Common problems
What fails on a 2020 MG 3
Fail rate by area
- Lights and electrics6.5%
- Tyres6%
- Brakes2.8%
- Windscreen, wipers and mirrors1.3%
- Suspension1.2%
- Exhaust, emissions and leaks0.4%
- Seat belts and airbags0.3%
Average for cars of the same age and mileage
Top failures
Headlamp aim set too low 2.53%
Headlamps aimed too low light the road poorly and reduce the driver's view ahead, especially at night.
Tyre ply or cords exposed 1.49%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Tyre cut reaching ply or cords 1.21%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Stop lamp not working 1.14%
A failed stop lamp means drivers behind cannot see when you brake, a safety risk that must be fixed.
Tyre pressure monitoring system faulty 0.88%
A faulty tyre pressure monitor cannot warn about low tyre pressure, so check tyres manually and have the fault diagnosed.
Tyre tread below 1.6mm 0.73%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Common advisories
Tyre worn close to legal limit (8.64%) · Tyre slightly damaged or cracking (6.94%) · Brake disc pitted or scored (5.37%) · Brake pads wearing thin (3.98%) · Child seat limits belt inspection (1.3%) · Brake discs showing some wear (1.28%)
Is a 2020 MG 3 reliable?
2020 MG 3s fail 15.7% of first MOT tests, 47% more MOT fails than the average car its age and mileage, ranking 4 of 7 3 years (4,224 DVSA tests, 2022 to 2024).
What fails on a 2020 MG 3 MOT?
Most often headlamp aim set too low (2.53% of tests), tyre ply or cords exposed (1.49% of tests), tyre cut reaching ply or cords (1.21% of tests).
How many miles should a 2020 MG 3 have done?
At its MOT aged about 3, a typical 2020 MG 3 shows 20,246 miles. Much higher or lower is worth asking about.
What plate is a 2020 car?
A car first registered in 2020 carries a 69 plate (January–February 2020), or a 20 plate (March–August 2020), or a 70 plate (September–December 2020).
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