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Mercedes-benz A - 2021

66.2 faults per 100 tests
Year average for all cars of 2021 is 80.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz A, model year 2021. Sample size: 19,603 cars, 48,608 tests and 32,165 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 19,603 cars

The 2021 Mercedes-Benz A model has an overall defect rate of 66 per 100 vehicles, which is significantly better than the yearly average of 79 per 100, marking a 16% improvement. The model shows a notable increase in defect rates as mileage rises, particularly in the 31,000 to 62,000-mile range. It excels in several categories, including steering, visibility, and lights and electrics, where it performs well below the average defect rates. Overall, this vehicle demonstrates a strong reliability profile compared to its peers from the same year.

Cars by mileage segment

Total: 19,603 cars

More model years for Mercedes-benz A

2018 2019 2020 2021 2022

Other models from Mercedes-benz

Mercedes-benz 190 E Mercedes-benz 300 Mercedes-benz A Mercedes-benz A 180 AMG LINE Mercedes-benz A 180 SPORT Mercedes-benz A 200 Mercedes-benz A 250 AMG LINE Mercedes-benz A-CLASS Mercedes-benz B Mercedes-benz B-CLASS Mercedes-benz C Mercedes-benz CITAN Mercedes-benz CL Mercedes-benz CL 500 Mercedes-benz CLA Mercedes-benz CLC Mercedes-benz CLK Mercedes-benz CLS Mercedes-benz E Mercedes-benz E 220 AMG Mercedes-benz EQA 250 AMG LINE Mercedes-benz EQC 400 AMG LINE Mercedes-benz ESPRINTER Mercedes-benz EVITO Mercedes-benz G Mercedes-benz G-CLASS Mercedes-benz GL Mercedes-benz GLA Mercedes-benz GLA 180 AMG LINE Mercedes-benz GLA 200 AMG LINE Mercedes-benz GLA 250 AMG LINE Mercedes-benz GLA 250 EXCLUSIVE Mercedes-benz GLB 200 AMG LINE Mercedes-benz GLB 220 AMG LINE Mercedes-benz GLC Mercedes-benz GLC 300 AMG Mercedes-benz GLC 300 AMG LINE Mercedes-benz GLE Mercedes-benz GLS Mercedes-benz GT Mercedes-benz ML Mercedes-benz R-Class Mercedes-benz S-Class Mercedes-benz SL Mercedes-benz SLC Mercedes-benz SLK Mercedes-benz SPRINTER Mercedes-benz V Mercedes-benz VIANO Mercedes-benz VITO Mercedes-benz X

Categories

Brakes
▲ 17.3% better
33.1 faults / 100 tests
Year avg: 40.0 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: significantly and obviously worn
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
Steering
▲ 14.3% better
0.6 faults / 100 tests
Year avg: 0.7 / 100 tests
Visibility
▲ 24.1% better
11.0 faults / 100 tests
Year avg: 14.5 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
Lights & Electrics
▲ 64.3% better
4.0 faults / 100 tests
Year avg: 11.2 / 100 tests
Wheels & Suspension
▲ 6.6% better
81.5 faults / 100 tests
Year avg: 87.3 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 66.7% better
0.7 faults / 100 tests
Year avg: 2.1 / 100 tests
Equipment
▲ 53.3% better
0.7 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 70.4% better
0.8 faults / 100 tests
Year avg: 2.7 / 100 tests

Fault rate by mileage segment

Model    Year average
0 268 0–31,000 mi 31,000–62,000 62,000–93,000 93,000–124,000 124,000+
* Metric: faults per 100 tests.

Most common faults (Top 10)

Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 10,708
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 4,432
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 4,085
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 1,544
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,282
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 968
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 924
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 894
Wiper blade: defective
MINOR
Occurrences: 866
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 748

Serious faults (Top 10)

A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 924
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 748
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 715
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 384
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 280
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 134
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 128
Any fracture or welding defect on a wheel
FAIL
Occurrences: 125
Lamp not securely attached
FAIL
Occurrences: 117
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 99