Mg B drophead vs Mg Zs: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mg B drophead
60%
MOT pass rate · 1 vehicles
Mg Zs
74%
MOT pass rate · 38,862 vehicles
Verdict: On MOT pass rate the Mg B drophead (60%) and Mg Zs (74%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Mg B drophead | Mg Zs |
|---|---|---|
| MOT pass rate | 60% | 74% ✓ |
| MOT failure rate | 40% | 26% ✓ |
| Faults & advisories per test | 0.4 ✓ | 1.8 |
| Dangerous-fault share | 0% ✓ | 1% |
| Average mileage | 5,706 mi | 71,653 mi |
| Sample size (vehicles) | 1 | 38,862 |
Most common faults
Mg B drophead
- Offside Front Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)
- mild rusting to underside & suspension wishbones.
- Nearside Front Windscreen washer provides insufficient washer liquid (8.2.3)
- Offside Front Headlamp not working on main beam (1.7.5a)
- Offside Front Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Front Front position lamp(s) not working (1.1.A.3b)
Mg Zs
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Parking brake: efficiency below requirements (3.7.B.7)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Mg B drophead (60%) and Mg Zs (74%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Mg B drophead report Full Mg Zs report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.