2021 Mercedes-Benz A-Class · 16,269 MOT tests
2021 Mercedes-Benz A-Class reliability
2021 Mercedes-Benz A-Classs fail 8.1% of first MOT tests, 32% fewer MOT fails than the average car its age and mileage, ranking 1 of 22 A-Class years (16,269 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz A-Classs: 20.6%)
- 8.1%
- first-time fail rate (all Mercedes-Benz A-Classs: 20.6%)
- fails than cars of the same age and mileage
- 32% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 26,600
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 16,269
- MOT tests, 2022 to 2024
Year on year
2021 against the years either side
- 2020 cars: 24% fewer MOT fails than the average car its age (the 2021 car does better)
- Strong point: windscreen, wipers and mirrors, 62% 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 A-Class
Fail rate by area
- Tyres4.3%
- Lights and electrics1.4%
- Windscreen, wipers and mirrors1.2%
- Brakes1.1%
- Wheels0.4%
- Suspension0.3%
- Number plates and VIN0.3%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.04%
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 0.84%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 0.6%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Wiper blade not clearing windscreen 0.51%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Headlamp aim set too high 0.34%
Headlamps aimed too high can dazzle other drivers, and adjusting them is usually a quick job.
Brake pads worn below 1.5mm 0.33%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Common advisories
Tyre worn close to legal limit (5.76%) · Brake pads wearing thin (2.37%) · Tyre slightly damaged or cracking (1.97%) · Tyre worn close to legal limit (0.93%) · Tyre has a shallow cut (0.92%) · Nail in tyre, monitor (0.88%)
Other years
Every Mercedes-Benz A-Class year
The full picture: Mercedes-Benz A-Class reliability. Before you pay for any Mercedes-Benz A-Class, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2021 Mercedes-Benz A-Class reliable?
2021 Mercedes-Benz A-Classs fail 8.1% of first MOT tests, 32% fewer MOT fails than the average car its age and mileage, ranking 1 of 22 A-Class years (16,269 DVSA tests, 2022 to 2024).
What fails on a 2021 Mercedes-Benz A-Class MOT?
Most often tyre cut reaching ply or cords (1.04% of tests), tyre tread below 1.6mm (0.84% of tests), tyre ply or cords exposed (0.6% of tests).
How many miles should a 2021 Mercedes-Benz A-Class have done?
At its MOT aged about 3, a typical 2021 Mercedes-Benz A-Class shows 26,600 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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