Bmw I4 - 2021
47.6 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 I4, model year 2021.
Sample size: 102 cars, 185 tests and 88 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: 102 cars
The 2021 BMW i4 has a significantly lower overall defect rate compared to the average car of the same year, with 48 defects per 100 vehicles, which is about 40% lower than the average of 79 defects. Among various mileage segments, the i4 shows a notable increase in defects with mileage, peaking at 190 defects per 100 vehicles in the 31,000–62,000-mile range, which is still better than the average across all segments. This model excels particularly in categories such as brakes, steering, and body structure, where it recorded zero defects, contrasting sharply with the average cars that have reported defects in these areas. Overall, the i4 stands out as a reliable choice, reflecting an impressive performance in key safety and structural categories.
Cars by mileage segment
Total: 102 cars
More model years for Bmw I4
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Bmw Z4
Categories
Brakes
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 40.0 / 100 tests
Steering
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 0.7 / 100 tests
Visibility
▲ 47.6% better
7.6 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
- An obstruction: materially affecting the driver’s view of the road through the swept area of the windscreen or an obligatory external mirror not visible
Lights & Electrics
▲ 90.2% better
1.1 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
Wheels & Suspension
▲ 0.9% better
86.5 faults / 100 tests
Year avg: 87.3 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A wheel: badly distorted or wear between wheel and hub at spigot mounting
- 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 lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 2.1 / 100 tests
Equipment
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 2.7 / 100 tests
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: 42
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 8
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 5
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 5
A wheel: badly distorted or wear between wheel and hub at spigot mounting
ADVISORY
Occurrences: 5
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 5
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 4
Tyre pressure monitoring system malfunctioning or obviously not working
PRS
Occurrences: 4
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 3
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 3
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 5
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 5
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 4
Tyres on the same axle or on twin wheels are different sizes
FAIL
Occurrences: 1
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 1