MG B Common Problems & Reliability
MG B's have a extremely good reliability rating of 801/999. The score was calculated from the average of every MG B that has had a registered MOT.
We calculated all of the below figures by getting the score from each vehicle make/model/year/fuel, which are each calculated a score. We then generate the average score, taking into account factors such as mileage and emissions.

Check the reliability of your MG B
Enter your registration to see the MOT history for this car.

Service history
Dealer & service records
MOT records
Past & current MOT data
Write-off check
Check for insurance write-offs
Finance check
Outstanding finance & theft checks
| Fuel Type | Year | Reliability Score | Avg Mileage | Sample Size |
|---|---|---|---|---|
| Petrol | 1979 | 736/999Very good | 83,994 miles | 728 vehicles |
| Petrol | 1978 | 746/999Very good | 83,615 miles | 557 vehicles |
| Petrol | 1974 | 813/999Excellent | 80,734 miles | 650 vehicles |
| Petrol | 1972 | 819/999Excellent | 80,737 miles | 801 vehicles |
| Petrol | 1970 | 831/999Excellent | 80,253 miles | 690 vehicles |
| Petrol | 1964 | 860/999Excellent | 80,539 miles | 552 vehicles |
Buying a MG B?
Common problems tell you what can affect MG Bs generally. VehicleScore® can check the history of the actual car you're considering.
Where does this data come from?
VehicleScore® analyses MOT histories from vehicles in its own dataset. Sample sizes vary by model, and a small sample is labelled as such. MOT data records roadworthiness and inspection defects. It does not capture every mechanical or electronic problem a car can have, and a comment on one test is not proof that the model has an inherent fault.