Mg ZS - 2020
118.6 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 Mg ZS, model year 2020.
Sample size: 13,031 cars, 28,176 tests and 33,412 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: 13,031 cars
The 2020 MG ZS has an overall defect rate of 119 per 100 vehicles, significantly higher than the average car of the same year, which stands at 90 per 100. This model shows increased issues in key areas such as brakes and wheels, with brake-related defects reported at 80% compared to the average of 49%. In contrast, it performs better in visibility and body structure defects, showing a notable reduction compared to the average. Mileage trends indicate that defect rates rise with increased mileage, particularly in the 31,000 to 93,000-mile range, where the MG ZS shows the highest defect occurrences.
Cars by mileage segment
Total: 13,031 cars
Categories
Brakes
▼ 57.5% worse
80.0 faults / 100 tests
Year avg: 50.8 / 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
▼ 33.3% worse
2.0 faults / 100 tests
Year avg: 1.5 / 100 tests
- A steering ball joint: with excessive wear or free play
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
- 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
- Excessive radial movement between the top of the steering column and the shaft indicating an excessively worn top bearing
Visibility
▲ 31.2% better
9.7 faults / 100 tests
Year avg: 14.1 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Wiper blade: missing or obviously not clearing the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▼ 42.9% worse
16.0 faults / 100 tests
Year avg: 11.2 / 100 tests
- 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
- Headlamp aim unable to be tested
- 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
Wheels & Suspension
▼ 23.8% worse
120.7 faults / 100 tests
Year avg: 97.5 / 100 tests
- 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
- Tyre tread depth not in accordance with the requirements
- A suspension pin, bush, joint or bearing: excessively worn
- A spring: or spring component fractured or seriously weakened
Body/Structure
▲ 33.3% better
1.6 faults / 100 tests
Year avg: 2.4 / 100 tests
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- A transmission shaft constant velocity joint boot: severely deteriorated
- Exhaust system has a major leak or is insecure
- A door will not open using the relevant control or close properly
- Bumper: insecure or with damage likely to cause injury when grazed or contacted
Equipment
▲ 33.3% better
1.0 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- A seat belt:
- Seat belt buckle missing, damaged or not functioning as intended
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- Seat belt buckle missing, damaged or not functioning as intended
Other
▼ 64.9% worse
6.1 faults / 100 tests
Year avg: 3.7 / 100 tests
- Emissions levels exceed default limits
- Emissions levels exceed the manufacturer’s specified limits
- 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
- 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: 7,744
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 6,223
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 4,181
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 2,011
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 961
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 775
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 674
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 656
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 596
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 557
Serious faults (Top 10)
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 656
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 533
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 522
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 445
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 392
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 254
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 226
Emissions levels exceed default limits
FAIL
Occurrences: 224
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 163
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 155