Mg ZS - 2018
165.6 faults per 100 tests
Year average for all cars of 2018 is 123.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mg ZS, model year 2018.
Sample size: 5,288 cars, 12,003 tests and 19,882 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: 5,288 cars
The 2018 MG ZS has a significantly higher overall defect rate of 166 defects per 100 cars compared to the yearly average of 120 defects per 100 cars, making it 38% worse than average. This model shows a concerning increase in defect rates with mileage, especially in the highest mileage bracket, where it reaches 359 defects per 100 vehicles. While it performs better in steering and body/structure issues, with notable lower defect rates, it struggles with brakes, lights and electrics, and suspension categories, where its rates are markedly higher than the average for the same year.
Cars by mileage segment
Total: 5,288 cars
Categories
Brakes
▼ 82.0% worse
125.2 faults / 100 tests
Year avg: 68.8 / 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 disc or drum: significantly and obviously worn
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▲ 48.0% better
2.6 faults / 100 tests
Year avg: 5.0 / 100 tests
- 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
- A steering ball joint: with excessive wear or free play
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
Visibility
▲ 7.9% better
12.8 faults / 100 tests
Year avg: 13.9 / 100 tests
- Wiper blade: defective
- 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: missing or obviously not clearing the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▼ 37.5% worse
24.2 faults / 100 tests
Year avg: 17.6 / 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
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- The aim of a headlamp is not within limits laid down in the requirements
- Lamp: multiple light source up to a half not functioning
Wheels & Suspension
▼ 19.7% worse
151.7 faults / 100 tests
Year avg: 126.7 / 100 tests
- A suspension component: excessively damaged or corroded
- Tyre tread depth not in accordance with the requirements
- Tyre tread depth not in accordance with the requirements
- A suspension pin, bush, joint or bearing: excessively worn
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 29.4% better
3.6 faults / 100 tests
Year avg: 5.1 / 100 tests
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Body, cab or chassis: excessively corroded at mounting points
- A door will not open using the relevant control or close properly
- Exhaust system has a major leak or is insecure
- A transmission shaft constant velocity joint boot: severely deteriorated
Equipment
▼ 36.4% worse
3.0 faults / 100 tests
Year avg: 2.2 / 100 tests
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Seat belt buckle missing, damaged or not functioning as intended
- ESC MIL indicates a system malfunction
- A seat belt:
- Seat belt buckle missing, damaged or not functioning as intended
Other
▼ 17.1% worse
8.2 faults / 100 tests
Year avg: 7.0 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- 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
- Emissions levels exceed default limits
- Engine MIL inoperative or indicating a malfunction
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: 3,746
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 3,742
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,618
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,151
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 1,036
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 558
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 479
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 443
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 393
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 280
Serious faults (Top 10)
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 443
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 280
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 247
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 226
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 212
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 186
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 182
Warning device shows system malfunction
FAIL
Occurrences: 151
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 150
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 132