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Bmw 840 - 2021

46.5 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 840, model year 2021. Sample size: 1,843 cars, 5,194 tests and 2,415 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,843 cars

The 2021 BMW 840 has an overall defect rate of 46.5 per 100 vehicles, significantly lower than the average of 78.6 per 100, marking a 40.8% improvement. This model shows a distinct trend with higher defect rates in the lower mileage categories, particularly peaking at 208 per 100 for vehicles under 31,000 miles. Notably, the BMW 840 excels in categories such as brakes, where it reports only 4.35% defects compared to the average of 38.14%, and in steering, where it has no reported defects at all. Other categories like visibility and lights and electrics also show marked improvements over the average, indicating strong performance in these areas while tyre wear remains a common issue across many vehicles.

Cars by mileage segment

Total: 1,843 cars

More model years for Bmw 840

1995 1996 1997 1998 1999 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
▲ 89.0% better
4.4 faults / 100 tests
Year avg: 40.0 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Excessive fluctuation in brake effort through each wheel revolution
  • Brake lining or pad: worn down to wear indicator
  • 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: 0.7 / 100 tests
Visibility
▲ 67.6% better
4.7 faults / 100 tests
Year avg: 14.5 / 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: defective
  • Windscreen or window excessively tinted: but not adversely affecting driver’s view
  • Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 64.3% better
4.0 faults / 100 tests
Year avg: 11.2 / 100 tests
  • A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
  • A lens defective: which has no effect on emitted light
  • The aim of a headlamp is not within limits laid down in the requirements
  • 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
Wheels & Suspension
▲ 12.7% better
76.2 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 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
▼ 9.5% worse
2.3 faults / 100 tests
Year avg: 2.1 / 100 tests
  • A transmission shaft flexible coupling: excessively deteriorated
  • A transmission shaft flexible coupling: excessively deteriorated
  • A transmission: joint, belt or chain excessively worn
  • A transmission: joint, belt or chain excessively worn
  • A door will not open using the relevant control or close properly
Equipment
▲ 66.7% better
0.5 faults / 100 tests
Year avg: 1.5 / 100 tests
  • A seat belt:
  • An SRS malfunction indicator lamp (MIL) indicates a system malfunction
  • A seat belt: webbing or flexible stalk significantly stretched or weakened
  • Audible warning:
Other
▲ 63.0% better
1.0 faults / 100 tests
Year avg: 2.7 / 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

Fault rate by mileage segment

Model    Year average
0 375 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: 852
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 358
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 350
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 181
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 79
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 65
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 61
A wheel: badly distorted or wear between wheel and hub at spigot mounting
ADVISORY
Occurrences: 54
A transmission shaft flexible coupling: excessively deteriorated
ADVISORY
Occurrences: 47
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 40

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 350
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 79
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 39
Any fracture or welding defect on a wheel
FAIL
Occurrences: 21
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 14
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 13
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 12
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 10
Tyre pressure monitoring system malfunctioning or obviously not working
FAIL
Occurrences: 5
A transmission shaft flexible coupling: excessively deteriorated
FAIL
Occurrences: 4