Mg 3 - 2018
155.2 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 3, model year 2018.
Sample size: 2,623 cars, 5,877 tests and 9,124 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: 2,623 cars
The 2018 MG 3 has an overall defect rate of 155 defects per 100 vehicles, which is significantly higher than the yearly average of 120 defects per 100. This model shows a clear trend of increasing defect rates with mileage, particularly alarming in the highest mileage category where it reaches 500 defects per 100. Notably, it excels in the body and structure category, performing better than the average, but it struggles in several areas such as brakes, visibility, wheels, and equipment, with defect rates consistently above average. Overall, while the MG 3 has some strengths, its higher defect rates in critical areas raise concerns about reliability as mileage increases.
Cars by mileage segment
Total: 2,623 cars
Categories
Brakes
▼ 29.4% worse
89.0 faults / 100 tests
Year avg: 68.8 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake pipe damaged or excessively corroded
- Parking brake efficiency: below minimum requirement
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
Steering
▲ 20.0% better
4.0 faults / 100 tests
Year avg: 5.0 / 100 tests
- A steering ball joint: with excessive wear or free play
- Power steering pipe, hose or wiring: excessively damaged or corroded
- A steering ball joint: with excessive wear or free play
- Power steering fluid leaking or system malfunctioning
- A steering ball joint: worn to the extent there is a serious risk of detachment
Visibility
▼ 41.7% worse
19.7 faults / 100 tests
Year avg: 13.9 / 100 tests
- 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
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
Lights & Electrics
▲ 1.1% better
17.4 faults / 100 tests
Year avg: 17.6 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- The aim of a headlamp is not within limits laid down in the requirements
- 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
- Stop lamp(s): all missing or inoperative
Wheels & Suspension
▼ 29.5% worse
164.1 faults / 100 tests
Year avg: 126.7 / 100 tests
- Tyre tread depth not in accordance with the requirements
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A spring: or spring component fractured or seriously weakened
- A suspension component: excessively damaged or corroded
- A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 29.4% better
3.6 faults / 100 tests
Year avg: 5.1 / 100 tests
- Exhaust system has a major leak or is insecure
- Fuel system: leaking, or missing or ineffective filler cap
- A transmission shaft constant velocity joint boot: severely deteriorated
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Fuel system: leaking excessively or a risk of fire
Equipment
▼ 168.2% worse
5.9 faults / 100 tests
Year avg: 2.2 / 100 tests
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt:
- ESC MIL indicates a system malfunction
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- A seat belt: or flexible stalk damaged
Other
▲ 2.9% better
6.8 faults / 100 tests
Year avg: 7.0 / 100 tests
- 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
- 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
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: 1,723
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 874
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 792
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 684
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 485
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 390
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 378
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 228
Wiper blade: defective
MINOR
Occurrences: 162
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 141
Serious faults (Top 10)
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 141
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 136
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 128
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 128
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 118
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 81
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 78
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 76
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 69
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 66