MG Mgf vs MG B: MOT reliability compared
Updated 05 September 2026.
23.2%
MG B MOT failure rate, 10.1 pts lower than MG Mgf
MG B is the more reliable MOT performer: 23.2% of MG B MOTs fail versus 33.3% for MG Mgf, a 10.1 point gap.
| Metric | MG Mgf | MG B |
|---|---|---|
| MOT failure rate | 33.3% | 23.2% |
| Tests analysed | 555,525 | 341,344 |
| Most common failure | Brakes (41.5%) | Lamps & electrical (40.9%) |
Questions and answers
Which is more reliable, MG Mgf or MG B?
MG B is the more reliable MOT performer: 23.2% of MG B MOTs fail versus 33.3% for MG Mgf, a 10.1 point gap.
What is the MOT failure rate of the MG Mgf?
33.3% of MG Mgf MOT tests result in a failure, from 555,525 tests.
What is the MOT failure rate of the MG B?
23.2% of MG B MOT tests result in a failure, from 341,344 tests.