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Bmw Z4 - 2020

53.1 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 Z4, model year 2020. Sample size: 1,958 cars, 5,113 tests and 2,716 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,958 cars

The 2020 BMW Z4 has a significantly lower overall defect rate of 53 defects per 100 vehicles compared to the average of 90 defects per 100 vehicles, representing a 41% improvement. The model shows particularly strong performance in the areas of brakes and steering, with defect rates of 4% and 0%, respectively, compared to much higher averages. Additionally, the Z4 performs well in visibility and lights and electrics, both of which have lower defect rates than the yearly averages. Mileage trends indicate that the defect rate increases with mileage, but the Z4's overall performance remains consistently better than the average car.

Cars by mileage segment

Total: 1,958 cars

More model years for Bmw Z4

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 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
▲ 92.1% better
4.0 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
  • Brake performance unable to be tested
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brakes imbalance across an axle such that: the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. Or in the case of testing on the road, the vehicle deviates excessively from a straight lin
Steering
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
Visibility
▲ 66.0% better
4.8 faults / 100 tests
Year avg: 14.1 / 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
  • Wiper blade: missing or obviously not clearing the windscreen
  • Wiper blade: defective
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 67.9% better
3.6 faults / 100 tests
Year avg: 11.2 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • Headlamp reflector or lens: slightly defective
  • 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
  • Beam image obviously incorrect
Wheels & Suspension
▲ 4.5% better
93.1 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
▲ 95.8% better
0.1 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
Equipment
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 83.8% better
0.6 faults / 100 tests
Year avg: 3.7 / 100 tests
  • Emissions test unable to be completed
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • 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

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: 1,262
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 432
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 240
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 140
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 95
A wheel: badly distorted or wear between wheel and hub at spigot mounting
ADVISORY
Occurrences: 71
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 61
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 55
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 52
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 38

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 240
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 95
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 38
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 15
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 13
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 9
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 8
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 7
Tyre pressure monitoring system malfunctioning or obviously not working
FAIL
Occurrences: 6
Any fracture or welding defect on a wheel
FAIL
Occurrences: 5