Mg ZS - 2021
87.2 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 Mg ZS, model year 2021.
Sample size: 15,599 cars, 32,117 tests and 27,999 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: 15,599 cars
The 2021 MG ZS has an overall defect rate of 87 per 100 vehicles, which is 11% higher than the average car of the same year, which stands at 79 per 100. Notably, the ZS shows significantly higher defect rates in the braking and steering categories, with rates of 71% and 1.2%, respectively, compared to the yearly averages of 38% and 0.7%. Conversely, the model excels in visibility, body structure, and equipment defects, with lower rates than the average. There is a clear trend indicating that defect rates increase with mileage, particularly in the mid to high mileage brackets, suggesting that older vehicles may face more issues overall.
Cars by mileage segment
Total: 15,599 cars
Categories
Brakes
▼ 77.5% worse
71.0 faults / 100 tests
Year avg: 40.0 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Significant brake effort recorded with no brake applied indicating a binding brake
- Brake lining or pad: worn below 1.5mm
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▼ 71.4% worse
1.2 faults / 100 tests
Year avg: 0.7 / 100 tests
- A steering ball joint: with excessive wear or free play
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- A steering ball joint: with excessive wear or free play
- Excessive radial movement between the top of the steering column and the shaft indicating an excessively worn top bearing
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
Visibility
▲ 42.1% better
8.4 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: missing or obviously not clearing the windscreen
- Wiper blade: defective
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 6.2% better
10.5 faults / 100 tests
Year avg: 11.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- Lamp: multiple light source up to a half not functioning
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
Wheels & Suspension
▲ 9.7% better
78.8 faults / 100 tests
Year avg: 87.3 / 100 tests
- 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
- Tyre tread depth not in accordance with the requirements
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 61.9% better
0.8 faults / 100 tests
Year avg: 2.1 / 100 tests
- Exhaust system has a major leak or is insecure
- A body panel or body component: damaged or corroded and likely to cause injury when grazed or contacted, or insecure
- A door will not open using the relevant control or close properly
- A transmission shaft constant velocity joint boot: severely deteriorated
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
Equipment
▲ 26.7% better
1.1 faults / 100 tests
Year avg: 1.5 / 100 tests
- Seat belt buckle missing, damaged or not functioning as intended
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- A seat belt:
Other
▲ 0.0% better
2.7 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
- 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
- Any part of the noise suppression system: insecure
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 6,258
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 5,971
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 2,564
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 2,318
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 893
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 773
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 625
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 531
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 486
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 477
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 486
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 477
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 399
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 290
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 247
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 205
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 201
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 196
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 135
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 110