2021 Mercedes-Benz GLA · 4,305 MOT tests
2021 Mercedes-Benz GLA reliability
2021 Mercedes-Benz GLAs fail 7% of first MOT tests, 40% fewer MOT fails than the average car its age and mileage, ranking 1 of 8 GLA years (4,305 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz GLAs: 13.4%)
- 7%
- first-time fail rate (all Mercedes-Benz GLAs: 13.4%)
- fails than cars of the same age and mileage
- 40% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 26,871
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 4,305
- MOT tests, 2022 to 2024
Year on year
2021 against the years either side
- 2020 cars: 32% fewer MOT fails than the average car its age (the 2021 car does better)
- Strong point: windscreen, wipers and mirrors, 58% fewer fails than comparable cars.
- Plates: a 2021 car carries a 70 plate (January–February 2021), or a 21 plate (March–August 2021), or a 71 plate (September–December 2021).
Common problems
What fails on a 2021 Mercedes-Benz GLA
Fail rate by area
- Tyres3.4%
- Windscreen, wipers and mirrors1.3%
- Lights and electrics0.8%
- Brakes0.6%
- Seat belts and airbags0.5%
- Exhaust, emissions and leaks0.3%
- Suspension0.3%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 0.98%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre tread below 1.6mm 0.65%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Wiper blade not clearing windscreen 0.28%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Windscreen washer fluid insufficient 0.26%
Washers are not supplying enough liquid, so the windscreen cannot be cleared properly, which is a safety issue.
Seat belt buckle not functioning 0.26%
A faulty buckle may not hold or release properly, which is a serious safety risk, so it must be fixed.
Headlamp aim set too low 0.23%
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 (6.18%) · Brake pads wearing thin (2.21%) · Tyre slightly damaged or cracking (1.74%) · Child seat limits belt inspection (1.11%) · Brake discs showing some wear (0.93%) · Nail in tyre, monitor (0.86%)
Other years
Every Mercedes-Benz GLA year
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Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2021 Mercedes-Benz GLA reliable?
2021 Mercedes-Benz GLAs fail 7% of first MOT tests, 40% fewer MOT fails than the average car its age and mileage, ranking 1 of 8 GLA years (4,305 DVSA tests, 2022 to 2024).
What fails on a 2021 Mercedes-Benz GLA MOT?
Most often tyre cut reaching ply or cords (0.98% of tests), tyre tread below 1.6mm (0.65% of tests), wiper blade not clearing windscreen (0.28% of tests).
How many miles should a 2021 Mercedes-Benz GLA have done?
At its MOT aged about 3, a typical 2021 Mercedes-Benz GLA shows 26,871 miles. Much higher or lower is worth asking about.
What plate is a 2021 car?
A car first registered in 2021 carries a 70 plate (January–February 2021), or a 21 plate (March–August 2021), or a 71 plate (September–December 2021).
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