Mazda CX-30 - 2021
84.6 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 Mazda CX-30, model year 2021.
Sample size: 8,509 cars, 17,562 tests and 14,861 recorded faults.
0%
More faults compared to the average car of same model year
More faults compared to the average car of same model year
Quick summary
Total: 8,509 cars
The 2021 Mazda CX-30 has an overall defect rate of 85 defects per 100 vehicles, which is 8% higher than the average for cars of the same year. Notably, this model performs exceptionally well in several categories, with significantly fewer issues related to steering, visibility, and lights and electrics compared to the average vehicle. However, it faces a notable challenge with brake defects, where its rate of 65 defects per 100 vehicles is considerably higher than the average of 38. Additionally, the defect rates tend to increase with mileage, particularly in the higher mileage segments.
Cars by mileage segment
Total: 8,509 cars
More model years for Mazda CX-30
Other models from Mazda
Categories
Brakes
▼ 63.0% worse
65.2 faults / 100 tests
Year avg: 40.0 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake disc or drum: significantly and obviously worn
- Excessive fluctuation in brake effort through each wheel revolution
- Brake lining or pad: worn below 1.5mm
- Brake lining or pad: worn below 1.5mm
Steering
▲ 85.7% better
0.1 faults / 100 tests
Year avg: 0.7 / 100 tests
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- A steering ball joint: with excessive wear or free play
- Steering linkage retaining or locking device missing or ineffective
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- Free play in the steering, measured at the rim of the steering wheel is: excessive
Visibility
▲ 32.4% better
9.8 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
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 72.3% better
3.1 faults / 100 tests
Year avg: 11.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- A lens defective: which has no effect on emitted light
- The aim of a headlamp is not within limits laid down in the requirements
- A battery insecure: but not likely to fall from carrier
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
Wheels & Suspension
▼ 2.2% worse
89.2 faults / 100 tests
Year avg: 87.3 / 100 tests
- A shock absorber damaged … or showing signs of severe leakage
- 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
▲ 85.7% better
0.3 faults / 100 tests
Year avg: 2.1 / 100 tests
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
- A transmission: joint, belt or chain excessively worn
- A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
- Exhaust system has a major leak or is insecure
- A transmission shaft constant velocity joint boot: severely deteriorated
Equipment
▲ 66.7% better
0.5 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt:
- A seat belt: or flexible stalk damaged
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- ESC MIL indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
Other
▲ 59.3% better
1.1 faults / 100 tests
Year avg: 2.7 / 100 tests
- 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
- Engine MIL inoperative or indicating a malfunction
- Engine MIL inoperative or indicating a malfunction
- Lambda coefficient outside the default limits or the range specified by the manufacturer
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: 3,520
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 2,818
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 2,298
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,781
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 810
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 658
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 457
Wiper blade: defective
MINOR
Occurrences: 249
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 239
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 215
Serious faults (Top 10)
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 239
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 215
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 177
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 124
A shock absorber damaged … or showing signs of severe leakage
FAIL
Occurrences: 83
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 75
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 63
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 37
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 32
Tyre pressure monitoring system malfunctioning or obviously not working
FAIL
Occurrences: 19