MG Zr vs MG Zs: MOT reliability compared
Updated 05 September 2026.
22.7%
MG Zs MOT failure rate, 7.5 pts lower than MG Zr
MG Zs is the more reliable MOT performer: 22.7% of MG Zs MOTs fail versus 30.2% for MG Zr, a 7.5 point gap.
| Metric | MG Zr | MG Zs |
|---|---|---|
| MOT failure rate | 30.2% | 22.7% |
| Tests analysed | 654,579 | 506,307 |
| Most common failure | Lamps & electrical (38.5%) | Brakes (33.3%) |
Questions and answers
Which is more reliable, MG Zr or MG Zs?
MG Zs is the more reliable MOT performer: 22.7% of MG Zs MOTs fail versus 30.2% for MG Zr, a 7.5 point gap.
What is the MOT failure rate of the MG Zr?
30.2% of MG Zr MOT tests result in a failure, from 654,579 tests.
What is the MOT failure rate of the MG Zs?
22.7% of MG Zs MOT tests result in a failure, from 506,307 tests.