Mg B - 1966
113.2 faults per 100 tests
Year average for all cars of 1966 is 95.5 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mg B, model year 1966.
Sample size: 145 cars, 227 tests and 257 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: 145 cars
The 1966 MG B has a slightly lower overall defect rate than the average car of the same year, with 113 defects per 100 vehicles compared to 116. While tyre wear is a common concern, this model significantly excels in brake and steering defects, showing better performance by 25% and 24% respectively. However, it does face higher issues in visibility and other categories, with defect rates 21% and 32% worse than average. Notably, the model's mileage-related trends indicate a significant increase in defects when exceeding 93,000 miles, which could be a consideration for potential buyers. Overall, the MG B presents a mixed picture of reliability, with strengths in critical systems but weaknesses in visibility and miscellaneous defects.
Cars by mileage segment
Total: 145 cars
Categories
Brakes
▼ 7.3% worse
44.1 faults / 100 tests
Year avg: 41.1 / 100 tests
- 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 efficiency: below minimum requirement
- Significant brake effort recorded with no brake applied indicating a binding brake
- Excessive fluctuation in brake effort through each wheel revolution
Steering
▲ 15.4% better
8.8 faults / 100 tests
Year avg: 10.4 / 100 tests
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- Excessive movement of centre of steering wheel up or down
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Excessive wear or play in a universal joint or a flexible coupling excessively deteriorated
- A steering ball joint: with excessive wear or free play
Visibility
▼ 29.2% worse
11.5 faults / 100 tests
Year avg: 8.9 / 100 tests
- 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
- Wiper blade: missing or obviously not clearing the windscreen
Lights & Electrics
▲ 4.7% better
20.3 faults / 100 tests
Year avg: 21.3 / 100 tests
- 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
- 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
- Headlamp aim unable to be tested
Wheels & Suspension
▼ 22.5% worse
75.8 faults / 100 tests
Year avg: 61.9 / 100 tests
- A suspension pin, bush, joint or bearing: excessively worn
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- Tyre tread depth not in accordance with the requirements
- A wheel bearing: excessively rough
- The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
Body/Structure
▼ 59.0% worse
22.9 faults / 100 tests
Year avg: 14.4 / 100 tests
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Vehicle structure corroded to the extent that: the rigidity of the assembly is significantly reduced
- Exhaust system has a major leak or is insecure
- A transmission: joint, belt or chain excessively worn
- Fuel tank, pipe or hose: insecure
Equipment
▲ 12.0% better
4.4 faults / 100 tests
Year avg: 5.0 / 100 tests
- A seat belt:
- Audible warning:
- Audible warning:
Other
▼ 37.6% worse
38.8 faults / 100 tests
Year avg: 28.2 / 100 tests
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- 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: 43
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 21
A wheel bearing: excessively rough
ADVISORY
Occurrences: 12
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 11
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 9
Exhaust system has a major leak or is insecure
ADVISORY
Occurrences: 9
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 7
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: 7
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 7
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
ADVISORY
Occurrences: 6
Serious faults (Top 10)
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
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: 7
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 7
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 5
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 4
The strength or continuity of the load bearing structure within 30cm … is significantly reduced or inadequately repaired
FAIL
Occurrences: 4
Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 3
Significant brake effort recorded with no brake applied indicating a binding brake
FAIL
Occurrences: 3
Audible warning:
FAIL
Occurrences: 3
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 3