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Bmw 420 - 2020

69.5 faults per 100 tests
Year average for all cars of 2020 is 91.3 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Bmw 420, model year 2020. Sample size: 4,086 cars, 9,431 tests and 6,550 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 4,086 cars

The 2020 BMW 420 has an overall defect rate of 69 per 100 vehicles, which is significantly lower than the yearly average of 90 per 100, marking a 23% improvement. The model shows particularly strong performance in categories such as steering, visibility, and body structure, with defect rates much lower than average, indicating fewer issues in these areas. Mileage-related trends reveal that defect rates increase with age, but the BMW 420 maintains a relatively low defect rate even as mileage increases. While tyre wear may be an issue, the standout areas highlight that this model excels in reliability compared to its peers.

Cars by mileage segment

Total: 4,086 cars

More model years for Bmw 420

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Other models from Bmw

Bmw 114 Bmw 116 Bmw 118 Bmw 120 Bmw 123 Bmw 125 Bmw 216 Bmw 218 Bmw 220 Bmw 316 Bmw 318 Bmw 320 Bmw 330 Bmw 335 Bmw 418 Bmw 420 Bmw 428 Bmw 430 Bmw 435 Bmw 440 Bmw 518 Bmw 520 Bmw 523 Bmw 525 Bmw 528 Bmw 530 Bmw 535 Bmw 630 Bmw 640 Bmw 645 Bmw 650 Bmw 728 Bmw 730 Bmw 740 Bmw 840 Bmw ALPINA Bmw I3 Bmw I4 Bmw IX3 Bmw M2 Bmw M3 Bmw M340D Bmw M4 Bmw M5 Bmw M6 Bmw X1 Bmw X2 Bmw X3 Bmw X4 Bmw X5 Bmw X6 Bmw X7 Bmw Z3 Bmw Z4

Categories

Brakes
▲ 17.1% better
42.1 faults / 100 tests
Year avg: 50.8 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: significantly and obviously worn
  • Excessive fluctuation in brake effort through each wheel revolution
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
Steering
▲ 93.3% better
0.1 faults / 100 tests
Year avg: 1.5 / 100 tests
  • A steering linkage component: fractured or deformed
  • A steering linkage component: fractured or deformed
Visibility
▲ 57.4% better
6.0 faults / 100 tests
Year avg: 14.1 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 67.0% better
3.7 faults / 100 tests
Year avg: 11.2 / 100 tests
  • An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
  • The aim of a headlamp is not within limits laid down in the requirements
  • The aim of a headlamp is not within limits laid down in the requirements
  • A registration plate lamp: not securely attached
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
Wheels & Suspension
▲ 14.2% better
83.7 faults / 100 tests
Year avg: 97.5 / 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 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
Body/Structure
▲ 91.7% better
0.2 faults / 100 tests
Year avg: 2.4 / 100 tests
  • Exhaust system has a major leak or is insecure
  • 6.1.1 (d) (i)
  • A transmission shaft flexible coupling: excessively deteriorated
  • Bumper: insecure or with damage likely to cause injury when grazed or contacted
  • Bumper: insecure or with damage likely to cause injury when grazed or contacted
Equipment
▲ 53.3% better
0.7 faults / 100 tests
Year avg: 1.5 / 100 tests
  • Audible warning:
  • A seat belt:
  • Audible warning:
  • Seat belt buckle missing, damaged or not functioning as intended
  • Audible warning not in accordance with requirements
Other
▲ 35.1% better
2.4 faults / 100 tests
Year avg: 3.7 / 100 tests
  • Smoke opacity levels exceed the manufacturer’s specified limit
  • Engine MIL inoperative or indicating a malfunction
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Engine MIL inoperative or indicating a malfunction
  • Lambda coefficient outside the default limits or the range specified by the manufacturer

Fault rate by mileage segment

Model    Year average
0 350 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: 2,143
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,036
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 456
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 449
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 339
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 237
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 234
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 202
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 164
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 147

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 339
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 234
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 147
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 100
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 62
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 30
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 24
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 20
Audible warning:
FAIL
Occurrences: 19
Any fracture or welding defect on a wheel
FAIL
Occurrences: 18