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Bmw M4 - 2020

45.5 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 M4, model year 2020. Sample size: 1,862 cars, 5,025 tests and 2,288 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,862 cars

The 2020 BMW M4 has an overall defect rate of 46 defects per 100 vehicles, significantly lower than the average of 90 defects per 100 for that year, indicating it performs 49% better than average. Notably, the model excels in several categories, with remarkable improvements in brakes (11% vs. 49%), steering (0.04% vs. 1.4%), and body/structure (0.68% vs. 2.32%). Mileage-related trends show higher defect rates in the lower mileage segments, but the M4 maintains a strong performance across the board. Overall, the BMW M4 stands out for its reliability, particularly in critical safety areas.

Cars by mileage segment

Total: 1,862 cars

More model years for Bmw M4

2014 2015 2016 2017 2018 2019 2020 2021 2022

Other models from Bmw

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Categories

Brakes
▲ 78.5% better
10.9 faults / 100 tests
Year avg: 50.8 / 100 tests
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
  • Brake fluid warning light illuminated or defective
  • Brake disc or drum: significantly and obviously worn
  • Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
  • A steering linkage component: fractured or deformed
Visibility
▲ 53.9% better
6.5 faults / 100 tests
Year avg: 14.1 / 100 tests
  • Wiper blade: defective
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Windscreen or window excessively tinted: but not adversely affecting driver’s view
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 58.0% better
4.7 faults / 100 tests
Year avg: 11.2 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
  • The aim of a headlamp is not within limits laid down in the requirements
  • Lamp: emitted colour, position or intensity not in accordance with the requirements
  • Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
Wheels & Suspension
▲ 31.5% better
66.8 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
▲ 70.8% better
0.7 faults / 100 tests
Year avg: 2.4 / 100 tests
  • A body panel or body component: damaged or corroded and likely to cause injury when grazed or contacted, or insecure
  • Exhaust system has a major leak or is insecure
  • Exhaust system has a major leak or is insecure
  • A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
Equipment
▲ 80.0% better
0.3 faults / 100 tests
Year avg: 1.5 / 100 tests
  • Audible warning not in accordance with requirements
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
Other
▲ 67.6% better
1.2 faults / 100 tests
Year avg: 3.7 / 100 tests
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • Exhaust noise levels in excess of those permitted
  • 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
  • Emissions test unable to be completed

Fault rate by mileage segment

Model    Year average
0 273 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: 689
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 359
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 276
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 172
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 108
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 95
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 95
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 63
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 40
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 37

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 276
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 108
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 40
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 17
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 16
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 12
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 8
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 8
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 5
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 4