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Bmw 420 - 2017

93.9 faults per 100 tests
Year average for all cars of 2017 is 137.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Bmw 420, model year 2017. Sample size: 13,337 cars, 30,834 tests and 28,949 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 13,337 cars

The 2017 BMW 420 exhibits a significantly lower overall defect rate of 94 defects per 100 vehicles compared to the average of 134 defects per 100 vehicles, marking a 30% improvement. Mileage-related trends show that defect rates increase with higher mileage, but even at higher mileages, the BMW 420 performs better than the average car. This model particularly excels in categories such as brakes and lights, with defect rates well below the average, indicating robust performance in these areas. Overall, the BMW 420 demonstrates a strong reliability profile compared to its peers from the same year.

Cars by mileage segment

Total: 13,337 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
▲ 32.0% better
49.3 faults / 100 tests
Year avg: 72.5 / 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
▲ 60.7% better
2.2 faults / 100 tests
Year avg: 5.6 / 100 tests
  • A steering ball joint: with excessive wear or free play
  • A steering ball joint: with excessive wear or free play
  • A steering ball joint: with excessive wear or free play
  • Free play in the steering, measured at the rim of the steering wheel is: excessive
  • Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 25.5% better
10.8 faults / 100 tests
Year avg: 14.5 / 100 tests
  • Wiper blade: defective
  • Wiper blade: missing or obviously not clearing the windscreen
  • 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
Lights & Electrics
▲ 73.0% better
5.5 faults / 100 tests
Year avg: 20.4 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
  • A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
  • The aim of a headlamp is not within limits laid down in the requirements
  • Lamp: multiple light source up to a half not functioning
Wheels & Suspension
▲ 21.5% better
112.4 faults / 100 tests
Year avg: 143.1 / 100 tests
  • A shock absorber damaged … or showing signs of severe leakage
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A suspension pin, bush, joint or bearing: excessively worn
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 87.1% better
0.9 faults / 100 tests
Year avg: 7.0 / 100 tests
  • A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
  • A transmission shaft flexible coupling: excessively deteriorated
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • Exhaust system has a major leak or is insecure
  • Bumper: insecure or with damage likely to cause injury when grazed or contacted
Equipment
▲ 51.9% better
1.3 faults / 100 tests
Year avg: 2.7 / 100 tests
  • Audible warning:
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • A seat belt:
  • Seat belt buckle missing, damaged or not functioning as intended
Other
▲ 40.0% better
5.4 faults / 100 tests
Year avg: 9.0 / 100 tests
  • 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
  • Smoke opacity levels exceed the manufacturer’s specified limit
  • Engine MIL inoperative or indicating a malfunction
  • Engine MIL inoperative or indicating a malfunction

Fault rate by mileage segment

Model    Year average
0 318 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: 9,293
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 3,131
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 2,384
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 1,360
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 1,239
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,205
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 899
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 852
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 758
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 717

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 1,239
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 758
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 486
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 339
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 244
A shock absorber damaged … or showing signs of severe leakage
FAIL
Occurrences: 201
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 161
Any fracture or welding defect on a wheel
FAIL
Occurrences: 143
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 136
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 100