Mg 3 - 2017
187.4 faults per 100 tests
Year average for all cars of 2017 is 137.4 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mg 3, model year 2017.
Sample size: 2,932 cars, 6,525 tests and 12,230 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: 2,932 cars
The 2017 MG 3 has an overall defect rate of 187 per 100 vehicles, which is significantly higher than the average rate of 134 per 100, indicating it performs worse than typical cars of the same year by 40%. Notably, as mileage increases, the defect rate escalates sharply, with vehicles over 124,000 miles showing a defect rate of nearly 394 per 100. The MG 3 particularly struggles in categories such as brakes and suspension, with defect rates of 109% and 202% respectively—both substantially higher than the average. Despite these issues, there are no standout positive categories where this model excels compared to its peers.
Cars by mileage segment
Total: 2,932 cars
Categories
Brakes
▼ 49.8% worse
108.6 faults / 100 tests
Year avg: 72.5 / 100 tests
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
- Brake pipe damaged or excessively corroded
- Brake pipe damaged or excessively corroded
- Parking brake efficiency: below minimum requirement
Steering
▼ 26.8% worse
7.1 faults / 100 tests
Year avg: 5.6 / 100 tests
- A steering ball joint: with excessive wear or free play
- A steering ball joint: worn to the extent there is a serious risk of detachment
- A steering ball joint: with excessive wear or free play
- Power steering fluid leaking or system malfunctioning
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
Visibility
▼ 46.2% worse
21.2 faults / 100 tests
Year avg: 14.5 / 100 tests
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: defective
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 9.3% better
18.5 faults / 100 tests
Year avg: 20.4 / 100 tests
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
- 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 rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
Wheels & Suspension
▼ 41.3% worse
202.2 faults / 100 tests
Year avg: 143.1 / 100 tests
- 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
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension component: excessively damaged or corroded
Body/Structure
▲ 27.1% better
5.1 faults / 100 tests
Year avg: 7.0 / 100 tests
- Exhaust system has a major leak or is insecure
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- A transmission shaft constant velocity joint boot: severely deteriorated
- Fuel system: leaking, or missing or ineffective filler cap
- A door will not open using the relevant control or close properly
Equipment
▼ 77.8% worse
4.8 faults / 100 tests
Year avg: 2.7 / 100 tests
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Seat belt buckle missing, damaged or not functioning as intended
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt:
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
Other
▲ 18.9% better
7.3 faults / 100 tests
Year avg: 9.0 / 100 tests
- 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
- Lambda coefficient outside the default limits or the range specified by the manufacturer
- Engine MIL inoperative or indicating a malfunction
- Emissions test unable to be completed
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: 1,966
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,125
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 1,010
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 922
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 876
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 784
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 580
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 332
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 192
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 189
Serious faults (Top 10)
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 192
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 189
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 144
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 143
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 138
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 133
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 132
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 114
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 100
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 94