2021 Mercedes-Benz GLB · 1,922 MOT tests
2021 Mercedes-Benz GLB reliability
2021 Mercedes-Benz GLBs fail 9.1% of first MOT tests, 26% fewer MOT fails than the average car its age and mileage, ranking 1 of 2 GLB years (1,922 DVSA tests, 2022 to 2024).
Looking at a 2021 Mercedes-Benz GLB?
See its own MOT history and mileage, free.
- first-time fail rate (all Mercedes-Benz GLBs: 9.7%)
- 9.1%
- first-time fail rate (all Mercedes-Benz GLBs: 9.7%)
- fails than cars of the same age and mileage
- 26% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 28,741
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 1,922
- MOT tests, 2022 to 2024
Year on year
2021 against the years either side
- 2020 cars: 23% fewer MOT fails than the average car its age (the 2021 car does better)
- Strong point: lights and electrics, 56% 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 GLB
Fail rate by area
- Tyres4.5%
- Windscreen, wipers and mirrors1.5%
- Brakes1.4%
- Lights and electrics1.2%
- Seat belts and airbags0.9%
- Suspension0.5%
- Exhaust, emissions and leaks0.4%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.56%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre ply or cords exposed 0.62%
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 0.52%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Brake pads worn below 1.5mm 0.52%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Tyre tread below 1.6mm 0.52%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Brake pads worn to wear indicator 0.47%
Pads worn to the indicator are at their limit, reducing braking and needing immediate replacement.
Common advisories
Tyre worn close to legal limit (5.93%) · Brake pads wearing thin (4.73%) · Tyre slightly damaged or cracking (3.64%) · Child seat limits belt inspection (2.6%) · Nail in tyre, monitor (2.08%) · Brake discs showing some wear (2.08%)
Other years
Every Mercedes-Benz GLB year
The full picture: Mercedes-Benz GLB reliability. Before you pay for any Mercedes-Benz GLB, 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 GLB reliable?
2021 Mercedes-Benz GLBs fail 9.1% of first MOT tests, 26% fewer MOT fails than the average car its age and mileage, ranking 1 of 2 GLB years (1,922 DVSA tests, 2022 to 2024).
What fails on a 2021 Mercedes-Benz GLB MOT?
Most often tyre cut reaching ply or cords (1.56% of tests), tyre ply or cords exposed (0.62% of tests), wiper blade not clearing windscreen (0.52% of tests).
How many miles should a 2021 Mercedes-Benz GLB have done?
At its MOT aged about 3, a typical 2021 Mercedes-Benz GLB shows 28,741 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).
Check a 2021 Mercedes-Benz GLB free
MOT history, mileage record, ULEZ, tax and recalls on any UK car, in seconds. No sign-up, no card.