Mg B - 1979
156.0 faults per 100 tests
Year average for all cars of 1979 is 106.5 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mg B, model year 1979.
Sample size: 249 cars, 418 tests and 652 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 1979 MG B exhibits a significantly higher overall defect rate compared to the average car of the same year, with approximately 156 defects per 100 vehicles, which is 46.5% higher than the average of 106 defects. Notably, the MG B shows particularly high rates of issues in the categories of brakes, steering, and visibility, with defect rates of 48% and above, exceeding the averages by substantial margins. Mileage trends indicate that defect rates decrease with increasing mileage, yet the model remains consistently above average in lower mileage categories. While it does have notable issues, particularly in safety-related areas, it also registers a higher rate of defects in wheels and suspensions compared to the average.
Cars by mileage segment
Total: 249 cars
Categories
Brakes
▼ 56.8% worse
48.3 faults / 100 tests
Year avg: 30.8 / 100 tests
- Brake pipe damaged or excessively corroded
- Significant brake effort recorded with no brake applied indicating a binding brake
- 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
Steering
▼ 63.8% worse
24.4 faults / 100 tests
Year avg: 14.9 / 100 tests
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- A steering ball joint: with excessive wear or free play
- A steering ball joint: with excessive wear or free play
Visibility
▼ 64.4% worse
14.8 faults / 100 tests
Year avg: 9.0 / 100 tests
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- A bonnet: which cannot be safely secured in the closed position
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▼ 37.9% worse
33.5 faults / 100 tests
Year avg: 24.3 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
- Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
- 4.3.1 (a) (iii)
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has only one lamp or all lamps not working
Wheels & Suspension
▼ 55.4% worse
109.1 faults / 100 tests
Year avg: 70.2 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A shock absorber damaged … or showing signs of severe leakage
- A suspension pin, bush, joint or bearing: excessively worn
- A wheel bearing: with excessive play
- A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 14.9% better
12.0 faults / 100 tests
Year avg: 14.1 / 100 tests
- Exhaust system has a major leak or is insecure
- Fuel system: leaking, or missing or ineffective filler cap
- Body or cab mounting: fixings missing or insecure such that overall security is significantly reduced
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- A transmission: joint, belt or chain excessively worn
Equipment
▼ 39.0% worse
5.7 faults / 100 tests
Year avg: 4.1 / 100 tests
- 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
- Audible warning:
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- 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
Other
▼ 40.9% worse
64.1 faults / 100 tests
Year avg: 45.5 / 100 tests
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Emissions levels exceed default 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
- 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: 90
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 72
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 34
Emissions levels exceed default limits
FAIL
Occurrences: 33
A wheel bearing: with excessive play
ADVISORY
Occurrences: 31
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 28
Steering rack gaiter or ball joint dust cover: damaged or deteriorated
MINOR
Occurrences: 26
A shock absorber damaged … or showing signs of severe leakage
ADVISORY
Occurrences: 19
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 17
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 17
Serious faults (Top 10)
Emissions levels exceed default limits
FAIL
Occurrences: 33
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 17
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 17
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 16
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 12
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: 10
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 9
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
FAIL
Occurrences: 8
A suspension component: with an unsafe modification
FAIL
Occurrences: 8
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 6