Bmw M340D - 2020
41.9 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 M340D, model year 2020.
Sample size: 358 cars, 806 tests and 338 recorded faults.
0%
Less faults compared to the average car of same model year
Less faults compared to the average car of same model year
Quick summary
Total: 358 cars
The 2020 BMW M340D has a significantly lower overall defect rate of 42 per 100 vehicles compared to the average of 90 per 100, marking a 53% improvement. While defects tend to increase with mileage, this model shows a notable spike in issues among lower mileage categories, particularly between 0–31,000 miles. Key areas where the M340D excels include brakes, with only 16% of vehicles failing in this category compared to the average of 49%, and visibility, where it also performs well at 8% versus 14%. Other categories like lights and body structure also show fewer defects compared to average cars, highlighting the M340D's strong reliability overall.
Cars by mileage segment
Total: 358 cars
More model years for Bmw M340D
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Bmw I3
Bmw I4
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Bmw M2
Bmw M3
Bmw M340D
Bmw M4
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Bmw Z4
Categories
Brakes
▲ 69.3% better
15.6 faults / 100 tests
Year avg: 50.8 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Excessive fluctuation in brake effort through each wheel revolution
- Parking brake control missing, defective or inoperative
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▲ 33.3% better
1.0 faults / 100 tests
Year avg: 1.5 / 100 tests
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Excessive roughness in operation of steering
Visibility
▲ 45.4% better
7.7 faults / 100 tests
Year avg: 14.1 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Windscreen or window damaged or seriously discoloured: and affecting the driver’s view of the road or of an obligatory external mirror
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Obligatory mirror or device: inoperative, excessively damaged or insecure
Lights & Electrics
▲ 58.0% better
4.7 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
- The aim of a headlamp is not within limits laid down in the requirements
Wheels & Suspension
▲ 46.6% better
52.1 faults / 100 tests
Year avg: 97.5 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- Tyre tread depth not in accordance with the requirements
- 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 cut in excess of the requirements deep enough to reach the ply or cords
Body/Structure
▲ 79.2% better
0.5 faults / 100 tests
Year avg: 2.4 / 100 tests
- A transmission shaft constant velocity joint boot: severely deteriorated
Equipment
▲ 53.3% better
0.7 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt:
- Seat belt buckle missing, damaged or not functioning as intended
Other
▲ 59.5% better
1.5 faults / 100 tests
Year avg: 3.7 / 100 tests
- 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
* Metric: faults per 100 tests.
Most common faults (Top 10)
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 136
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 31
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 28
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 21
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 19
The aim of a headlamp is not within limits laid down in the requirements
PRS
Occurrences: 14
Excessive fluctuation in brake effort through each wheel revolution
ADVISORY
Occurrences: 12
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 11
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 10
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 9
Serious faults (Top 10)
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 31
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 11
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 10
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 5
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 4
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 3
Windscreen or window damaged or seriously discoloured: and affecting the driver’s view of the road or of an obligatory external mirror
FAIL
Occurrences: 2
Seat belt buckle missing, damaged or not functioning as intended
FAIL
Occurrences: 2
Tyre pressure monitoring system malfunctioning or obviously not working
FAIL
Occurrences: 1
Obligatory mirror or device: inoperative, excessively damaged or insecure
FAIL
Occurrences: 1