Skip to main content

Bmw X4 - 2021

53.8 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 X4, model year 2021. Sample size: 1,950 cars, 4,932 tests and 2,653 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,950 cars

The 2021 BMW X4 exhibits a lower overall defect rate compared to the average car of the same year, with 54 defects per 100 vehicles compared to the average of 79, marking a 31.5% improvement. This model shows particularly strong performance in categories such as brakes, steering, and body structure, with defect rates significantly lower than average. Notably, issues related to visibility and lights are also less prevalent in this model. While mileage-related trends indicate slightly higher defect rates with increased mileage, the overall reliability of the BMW X4 remains commendable compared to its peers.

Cars by mileage segment

Total: 1,950 cars

More model years for Bmw X4

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
▲ 77.0% better
9.2 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
  • Parking brake control missing, defective or inoperative
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 71.4% better
0.2 faults / 100 tests
Year avg: 0.7 / 100 tests
  • A steering ball joint: with excessive wear or free play
Visibility
▲ 37.2% better
9.1 faults / 100 tests
Year avg: 14.5 / 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
  • Wiper blade: missing or obviously not clearing the windscreen
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 65.2% better
3.9 faults / 100 tests
Year avg: 11.2 / 100 tests
  • The aim of a headlamp is not within limits laid down in the requirements
  • An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
  • A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
  • Lamp: emitted colour, position or intensity not in accordance with the requirements
Wheels & Suspension
▲ 6.1% better
82.0 faults / 100 tests
Year avg: 87.3 / 100 tests
  • 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
  • Tyre tread depth not in accordance with the requirements
  • 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
Body/Structure
▲ 76.2% better
0.5 faults / 100 tests
Year avg: 2.1 / 100 tests
  • A transmission shaft constant velocity joint boot: severely deteriorated
  • A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
  • Exhaust system has a major leak or is insecure
  • A body panel or body component: damaged or corroded and likely to cause injury when grazed or contacted, or insecure
Equipment
▲ 93.3% better
0.1 faults / 100 tests
Year avg: 1.5 / 100 tests
  • Seat belt not functioning as intended or of an incorrect type
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 0.0% better
2.7 faults / 100 tests
Year avg: 2.7 / 100 tests
  • Engine MIL inoperative or indicating a malfunction
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • 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

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: 1,300
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 281
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 137
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 105
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 97
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 94
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 76
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 59
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 42
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 40

Serious faults (Top 10)

A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 97
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 76
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 59
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 30
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 28
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 20
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 19
A wheel: with a loose or missing wheel nut, bolt or stud
FAIL
Occurrences: 18
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 9
An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 9