MG B MOT Pass Rate
84.9% of 5,622 MG B MOT tests pass.
The B's pass rate of 84.9% is in line with the average across all MG models, at 84.6%.
The MG B passes its MOT 84.9% of the time — well above the national average for cars, which sits at 79.2%.
Pass rate by vehicle age
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | no tests recorded | 0 | no reading |
| 3–6 years | too few tests (3) | 3 | no reading |
| 6–10 years | too few tests (6) | 6 | no reading |
| 10–15 years | too few tests (5) | 5 | no reading |
| 15+ years | 85.0% | 5,608 | 43,430 miles |
Common MOT failure reasons for the MG B
The most common reason the MG B fails its MOT is lamps, reflectors and electrical equipment — present in 75.6% of failed tests, most often logged as "Not working".
| Category | Share of failed tests | Example |
|---|---|---|
| Lamps, reflectors and electrical equipment | 75.6% | Not working |
| Brakes | 49.3% | Across an axle |
| Visibility | 27.2% | Not working |
| Suspension | 23.0% | Pin or bush excessively worn |
| Noise, emissions and leaks | 19.8% | Emissions carbon monoxide content excessive |
| Steering | 16.8% | Gaiter missing or no longer prevents the ingress of dirt |
| Body, chassis, structure | 15.8% | Corroded to the extent that the rigidity of the assembly is significantly reduced |
| Tyres | 4.5% | Has a tear, caused by separation or partial failure of its structure |
| Seat belts and supplementary restraint systems | 3.0% | Prescribed area strength or continuity significantly reduced |
| Road Wheels | 2.8% | Fixing loose |