Mazda 6 - 2021
74.0 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 Mazda 6, model year 2021.
Sample size: 687 cars, 1,421 tests and 1,051 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: 687 cars
The 2021 Mazda 6 shows a lower overall defect rate of 74 defects per 100 vehicles compared to the average of 79 defects per 100, marking a 6% improvement. The model performs particularly well in categories such as steering, lighting, and body structure, with significantly fewer defects than the average car. However, it has a notable issue with brakes, exhibiting a higher defect rate at nearly 49%. Mileage-related trends indicate that the defect rate increases with mileage, especially in the higher brackets, although the Mazda 6 remains competitive overall.
Cars by mileage segment
Total: 687 cars
Categories
Brakes
▼ 22.5% worse
49.0 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
- Excessive fluctuation in brake effort through each wheel revolution
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 0.7 / 100 tests
Visibility
▲ 0.7% better
14.4 faults / 100 tests
Year avg: 14.5 / 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
- Wiper blade: defective
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 68.8% better
3.5 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
- The aim of a headlamp is not within limits laid down in the requirements
- Reflector defective or damaged: by up to 50% of the reflecting surface
Wheels & Suspension
▲ 11.1% better
77.6 faults / 100 tests
Year avg: 87.3 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension pin, bush, joint or bearing: excessively worn
- 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
▲ 33.3% better
1.4 faults / 100 tests
Year avg: 2.1 / 100 tests
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- Exhaust system has a major leak or is insecure
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- A transmission shaft bearing: excessively worn
- A transmission shaft constant velocity joint boot: severely deteriorated
Equipment
▲ 26.7% better
1.1 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt:
- Seat belt retractor not functioning as intended
- Seat belt buckle missing, damaged or not functioning as intended
- Seat belt not functioning as intended or of an incorrect type
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
- Lambda coefficient outside the default limits or the range specified by the manufacturer
- Emissions levels exceed default limits
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: 306
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 142
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 129
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 104
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 52
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 37
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 32
Wiper blade: defective
MINOR
Occurrences: 28
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 27
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 22
Serious faults (Top 10)
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 22
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 16
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 16
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 13
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 11
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 9
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 4
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 4
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 4
Bumper: insecure or with damage likely to cause injury when grazed or contacted
FAIL
Occurrences: 3