Mg B - 1981
130.9 faults per 100 tests
Year average for all cars of 1981 is 130.9 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mg B, model year 1981.
Sample size: 249 cars, 433 tests and 567 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: 249 cars
The MG B from 1981 has an overall defect rate that matches the yearly average, with 131 defects reported per 100 vehicles. However, when examining mileage trends, the defect rate significantly increases with mileage, particularly in the 62,000 to 93,000 miles range, where it peaks at 309 defects per 100 vehicles. Unlike many models, this car does not have standout areas of performance, with no specific categories showing either better or worse results compared to average. Overall, the data indicates that while the MG B aligns with average defect rates, it presents a notable increase in defects as mileage increases.
Cars by mileage segment
Total: 249 cars
Categories
Brakes
▲ 0.0% better
45.7 faults / 100 tests
Year avg: 45.7 / 100 tests
- Brake pipe damaged or excessively corroded
- Significant brake effort recorded with no brake applied indicating a binding brake
- Brakes imbalance across an axle such that: the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. Or in the case of testing on the road, the vehicle deviates excessively from a straight lin
- Brakes imbalance across an axle such that: the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. Or in the case of testing on the road, the vehicle deviates excessively from a straight lin
- Parking brake inoperative on one side, or in the case of testing on the road, the vehicle deviates excessively from a straight line
Steering
▲ 0.0% better
14.8 faults / 100 tests
Year avg: 14.8 / 100 tests
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Power steering fluid leaking or system malfunctioning
Visibility
▲ 0.0% better
10.6 faults / 100 tests
Year avg: 10.6 / 100 tests
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
- Obligatory mirror or device missing
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Obligatory mirror or device: slightly damaged or loose
Lights & Electrics
▲ 0.0% better
29.6 faults / 100 tests
Year avg: 29.6 / 100 tests
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
- Stop lamp(s): all missing or inoperative
- 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
Wheels & Suspension
▲ 0.0% better
71.6 faults / 100 tests
Year avg: 71.6 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A spring: or spring component fractured or seriously weakened
- A wheel bearing: with excessive play
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 0.0% better
20.3 faults / 100 tests
Year avg: 20.3 / 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
- Body, cab or chassis: excessively corroded at mounting points
- Exhaust system has a major leak or is insecure
- Fuel system: leaking, or missing or ineffective filler cap
Equipment
▲ 0.0% better
4.2 faults / 100 tests
Year avg: 4.2 / 100 tests
- A seat belt:
- is significantly reduced or The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a ’prescribed area’): inadequately repaired
- is significantly reduced or The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a ’prescribed area’): inadequately repaired
- A seat belt: or flexible stalk damaged
- Audible warning:
Other
▲ 0.0% better
65.1 faults / 100 tests
Year avg: 65.1 / 100 tests
- Emissions levels exceed default limits
- Exhaust emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Emissions levels exceed default limits
- Emissions test unable to be completed
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 99
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 46
Emissions levels exceed default limits
FAIL
Occurrences: 36
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 34
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 26
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 17
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 15
Steering rack gaiter or ball joint dust cover: damaged or deteriorated
MINOR
Occurrences: 14
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 14
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 13
Serious faults (Top 10)
Emissions levels exceed default limits
FAIL
Occurrences: 36
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 14
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 13
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 9
Brakes imbalance across an axle such that: the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. Or in the case of testing on the road, the vehicle deviates excessively from a straight lin
FAIL
Occurrences: 9
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 8
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 8
Parking brake inoperative on one side, or in the case of testing on the road, the vehicle deviates excessively from a straight line
FAIL
Occurrences: 7
Exhaust system has a major leak or is insecure
FAIL
Occurrences: 6
Stop lamp(s): all missing or inoperative
FAIL
Occurrences: 4