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Bmw M4 - 2018

51.5 faults per 100 tests
Year average for all cars of 2018 is 123.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Bmw M4, model year 2018. Sample size: 2,788 cars, 7,543 tests and 3,882 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,788 cars

The 2018 BMW M4 shows an overall defect rate of 51 per 100 vehicles, significantly lower than the average of 120 per 100 for cars of the same year, marking a 57% improvement. Notably, it excels in several key areas: brake defects are just 16%, compared to the average of 67%, and it has almost no defects in steering and body structure, both of which are much worse on average. Mileage-related trends indicate higher defect rates in lower-mileage segments for the M4, particularly in the 0–31,000 miles category. Overall, this model demonstrates strong performance in critical safety-related categories while showing a lower frequency of general defects compared to its peers.

Cars by mileage segment

Total: 2,788 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
▲ 77.3% better
15.6 faults / 100 tests
Year avg: 68.8 / 100 tests
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
  • Brake pipe damaged or excessively corroded
  • Brake disc or drum: significantly and obviously worn
  • Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 92.0% better
0.4 faults / 100 tests
Year avg: 5.0 / 100 tests
  • Steering rack gaiter or ball joint dust cover: damaged or deteriorated
  • 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
▲ 53.2% better
6.5 faults / 100 tests
Year avg: 13.9 / 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
▲ 81.3% better
3.3 faults / 100 tests
Year avg: 17.6 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • Reflector defective or damaged: by up to 50% of the reflecting surface
  • A direction indicator: lamp missing, 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
  • Lamp: emitted colour, position or intensity not in accordance with the requirements
Wheels & Suspension
▲ 42.0% better
73.5 faults / 100 tests
Year avg: 126.7 / 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 spring: or spring component fractured or seriously weakened
Body/Structure
▲ 94.1% better
0.3 faults / 100 tests
Year avg: 5.1 / 100 tests
  • Exhaust system has a major leak or is insecure
  • 6.1.1 (d) (i)
  • Exhaust system has a major leak or is insecure
Equipment
▲ 90.9% better
0.2 faults / 100 tests
Year avg: 2.2 / 100 tests
  • Audible warning:
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • ESC MIL indicates a system malfunction
Other
▲ 55.7% better
3.1 faults / 100 tests
Year avg: 7.0 / 100 tests
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
  • Emissions levels exceed default limits
  • Emission control equipment fitted by the manufacturer: missing, obviously modified or obviously defective
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • Engine MIL inoperative or indicating a malfunction

Fault rate by mileage segment

Model    Year average
0 533 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: 1,355
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 385
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 337
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 305
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 190
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 127
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 102
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 100
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 99
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 88

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 337
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 190
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 100
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 51
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 44
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 36
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 25
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 16
Lambda coefficient outside the default limits or the range specified by the manufacturer
FAIL
Occurrences: 11
Tyre pressure monitoring system malfunctioning or obviously not working
FAIL
Occurrences: 10