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Bmw 840 - 2020

48.3 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 840, model year 2020. Sample size: 1,856 cars, 4,751 tests and 2,297 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 1,856 cars

The 2020 BMW 840 has a significantly lower overall defect rate of 48 defects per 100 vehicles compared to the average of 90 defects per 100 vehicles, marking a 46% improvement. Notably, this model excels in categories such as brakes, steering, and visibility, with defect rates far below the yearly averages. For instance, only 11% of 840s had brake issues compared to 49% on average, and steering issues were minimal at just 0.08%. However, in the mileage segments, defect rates increase substantially with higher mileage, particularly peaking in the 93,000–124,000 mile category, indicating a trend toward more issues as vehicles age. Overall, the BMW 840 demonstrates impressive reliability relative to its peers in many crucial areas.

Cars by mileage segment

Total: 1,856 cars

More model years for Bmw 840

1995 1996 1997 1998 1999 2019 2020 2021 2022

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Categories

Brakes
▲ 77.6% better
11.4 faults / 100 tests
Year avg: 50.8 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Excessive fluctuation in brake effort through each wheel revolution
  • Parking brake control missing, defective or inoperative
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 93.3% better
0.1 faults / 100 tests
Year avg: 1.5 / 100 tests
  • A steering ball joint: with excessive wear or free play
Visibility
▲ 68.1% better
4.5 faults / 100 tests
Year avg: 14.1 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: missing or obviously not clearing the windscreen
  • Windscreen or window excessively tinted: but not adversely affecting driver’s view
  • Windscreen washers not working or not providing sufficient fluid to clear the windscreen
  • Wiper blade: defective
Lights & Electrics
▲ 54.5% better
5.1 faults / 100 tests
Year avg: 11.2 / 100 tests
  • 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
  • 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
  • Electrical wiring insulation: in such a condition there is an imminent risk of fire or formation of sparks
Wheels & Suspension
▲ 25.4% better
72.7 faults / 100 tests
Year avg: 97.5 / 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
▲ 29.2% better
1.7 faults / 100 tests
Year avg: 2.4 / 100 tests
  • A transmission shaft flexible coupling: excessively deteriorated
  • Exhaust system has a major leak or is insecure
  • A transmission shaft flexible coupling: excessively deteriorated
  • A transmission: joint, belt or chain excessively worn
Equipment
▲ 86.7% better
0.2 faults / 100 tests
Year avg: 1.5 / 100 tests
  • Seat belt buckle missing, damaged or not functioning as intended
  • A seat belt:
  • A seat belt:
Other
▲ 75.7% better
0.9 faults / 100 tests
Year avg: 3.7 / 100 tests
  • Emissions levels exceed default limits
  • Lambda coefficient outside the default limits or the range specified by the manufacturer
  • 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
  • Smoke opacity levels exceed the manufacturer’s specified limit

Fault rate by mileage segment

Model    Year average
0 1,000 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: 734
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 282
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 272
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 221
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 137
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 110
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 77
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 74
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 59
A transmission shaft flexible coupling: excessively deteriorated
ADVISORY
Occurrences: 33

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 272
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 110
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 23
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 18
Any fracture or welding defect on a wheel
FAIL
Occurrences: 15
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 15
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 12
Emissions levels exceed default limits
FAIL
Occurrences: 12
A transmission shaft flexible coupling: excessively deteriorated
FAIL
Occurrences: 6
Parking brake control missing, defective or inoperative
FAIL
Occurrences: 4