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Mazda 6 vs Mazda Mx-5 roadster sport black: reliability comparison

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

Mazda 6
75%
MOT pass rate · 159,403 vehicles
Mazda Mx-5 roadster sport black
93%
MOT pass rate · 12 vehicles
Verdict: On MOT pass rate the Mazda 6 (75%) and Mazda Mx-5 roadster sport black (93%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mazda 6 Mazda Mx-5 roadster sport black
MOT pass rate 75% 93% ✓
MOT failure rate 25% 7% ✓
Faults & advisories per test 1.9 0.1 ✓
Dangerous-fault share 2% 0% ✓
Average mileage 113,866 mi 54,786 mi
Sample size (vehicles) 159,403 12

Most common faults

Mazda 6

  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. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Rear Brake pad(s) wearing thin (3.5.1g)
  5. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Under-trays fitted obscuring some underside components

Mazda Mx-5 roadster sport black

  1. Front Inner Brake pad(s) wearing thin (1.1.13 (a) (ii))
  2. Nearside Rear Anti-roll bar linkage ball joint dust cover severely deteriorated (5.3.4 (b) (i))
  3. Offside Rear Anti-roll bar linkage ball joint dust cover severely deteriorated (5.3.4 (b) (i))
  4. Nearside Headlamp aim too low (4.1.2 (a))
  5. Offside Headlamp aim too low (4.1.2 (a))
  6. Offside Front Anti-roll bar linkage damaged but not seriously weakened (5.3.3 (b) (i))

Reliability FAQ

On MOT pass rate the Mazda 6 (75%) and Mazda Mx-5 roadster sport black (93%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mazda 6 report Full Mazda Mx-5 roadster sport black 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.