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Bmw 420 - 2021

46.4 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 Bmw 420, model year 2021. Sample size: 5,640 cars, 14,234 tests and 6,610 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 5,640 cars

The 2021 BMW 420 has an overall defect rate of 46 per 100 vehicles, significantly lower than the yearly average of 79 per 100, making it 41% less likely to have defects. This model excels particularly in categories such as brakes, steering, and visibility, with defect rates much lower than the average car. However, it does show a higher incidence of issues related to equipment compared to the average. Mileage trends indicate that the vehicle performs well across all mileage ranges, with the highest defect rates occurring at the 124,000+ miles mark. Overall, the BMW 420 demonstrates strong reliability compared to its peers for this model year.

Cars by mileage segment

Total: 5,640 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
▲ 72.8% better
10.9 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
  • 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
▲ 85.7% better
0.1 faults / 100 tests
Year avg: 0.7 / 100 tests
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • Track rod or drag link ends seriously misaligned
  • A steering ball joint: with excessive wear or free play
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 61.4% better
5.6 faults / 100 tests
Year avg: 14.5 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • 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: defective
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 69.6% better
3.4 faults / 100 tests
Year avg: 11.2 / 100 tests
  • 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
  • Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
  • A direction indicator: lamp with a multiple light source up to 1/2 not functioning
Wheels & Suspension
▲ 20.0% better
69.8 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 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
▲ 95.2% better
0.1 faults / 100 tests
Year avg: 2.1 / 100 tests
  • An engine mounting or bracket: severely damaged or deteriorated resulting in excessive movement
  • A door will not open using the relevant control or close properly
  • A passenger seat: with a defective structure or the backrest cannot be retained in the upright position
Equipment
▼ 40.0% worse
2.1 faults / 100 tests
Year avg: 1.5 / 100 tests
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
  • A seat belt: or flexible stalk damaged
  • Seat belt buckle missing, damaged or not functioning as intended
  • A seat belt:
  • Audible warning:
Other
▲ 74.1% better
0.7 faults / 100 tests
Year avg: 2.7 / 100 tests
  • Engine MIL inoperative or indicating a malfunction
  • 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
  • Any part of the noise suppression system: insecure

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: 2,421
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 612
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 493
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 453
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 346
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 310
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 263
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 193
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 181
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 162

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 612
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 310
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 263
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 51
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 34
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 32
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 29
Any fracture or welding defect on a wheel
FAIL
Occurrences: 23
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 23
A shock absorber damaged … or showing signs of severe leakage
FAIL
Occurrences: 15