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Mazda Cx8 vs Mazda Mx-5: reliability comparison

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

Mazda Cx8
82%
MOT pass rate · 5 vehicles
Mazda Mx-5
77%
MOT pass rate · 162,634 vehicles
Verdict: On MOT pass rate the Mazda Cx8 (82%) and Mazda Mx-5 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mazda Cx8 Mazda Mx-5
MOT pass rate 82% ✓ 77%
MOT failure rate 18% ✓ 23%
Faults & advisories per test 0.6 ✓ 1.8
Dangerous-fault share 0% ✓ 1%
Average mileage 52,456 mi 90,085 mi
Sample size (vehicles) 5 162,634

Most common faults

Mazda Cx8

  1. Offside Rear Child Seat fitted not allowing full inspection of adult belt
  2. trays and covers fitted
  3. Rear fog lamp missing (4.5.1 (a) (ii))
  4. Rear fog lamp switch missing (4.5.3 (a))
  5. Nearside Front Side repeater not working (4.4.1 (a) (ii))
  6. Rear fog lamp not working (4.5.1 (a) (ii))

Mazda Mx-5

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Front Brake pad(s) wearing thin (3.5.1g)
  4. Rear Brake pad(s) wearing thin (3.5.1g)
  5. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Oil leak, but not excessive (8.4.1 (a) (i))

Reliability FAQ

On MOT pass rate the Mazda Cx8 (82%) and Mazda Mx-5 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mazda Cx8 report Full Mazda Mx-5 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.