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Mg Roadster convertible vs Mg Zs: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Mg Roadster convertible
67%
MOT pass rate · 1 vehicles
Mg Zs
74%
MOT pass rate · 38,862 vehicles
Verdict: On MOT pass rate the Mg Roadster convertible (67%) 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 Roadster convertible Mg Zs
MOT pass rate 67% 74% ✓
MOT failure rate 33% 26% ✓
Faults & advisories per test 0.3 ✓ 1.8
Dangerous-fault share 0% ✓ 1%
Average mileage 42,376 mi 71,653 mi
Sample size (vehicles) 1 38,862

Most common faults

Mg Roadster convertible

  1. Exhaust emissions hydrocarbon content excessive (7.3.B.1b)
  2. Offside Front position lamp(s) not working (1.1.A.3b)
  3. Offside Rear position lamp(s) excessively deteriorated so that it is not visible from a reasonable distance (1.1.A.3d)
  4. Offside Registration plate lamp not working (1.1.5c)
  5. Fuel pipe leaking (7.2.3)
  6. Fuel system component leaking (7.2.3)

Mg Zs

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Parking brake: efficiency below requirements (3.7.B.7)
  4. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Mg Roadster convertible (67%) and Mg Zs (74%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mg Roadster convertible 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.