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Mazda 3 vs Mazda Cx-30 se-l mhev auto: reliability comparison

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

Mazda 3
78%
MOT pass rate · 164,058 vehicles
Mazda Cx-30 se-l mhev auto
91%
MOT pass rate · 71 vehicles
More reliable
Verdict: On MOT pass rate, the Mazda Cx-30 se-l mhev auto is the more reliable of the two — 91% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Mazda 3 Mazda Cx-30 se-l mhev auto
MOT pass rate 78% 91% ✓
MOT failure rate 22% 9% ✓
Faults & advisories per test 2.0 1.2 ✓
Dangerous-fault share 3% 3%
Average mileage 90,915 mi 37,393 mi
Sample size (vehicles) 164,058 71

Most common faults

Mazda 3

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  4. Rear Sub-frame corroded but not seriously weakened (5.3.3 (b) (i))
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))

Mazda Cx-30 se-l mhev auto

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Rear Shock absorbers has light misting of oil (5.3.2 (b))
  3. Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  6. Nearside Rear Shock absorbers has light misting of oil (5.3.2 (b))

Reliability FAQ

On MOT pass rate, the Mazda Cx-30 se-l mhev auto is the more reliable of the two — 91% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Mazda 3 report Full Mazda Cx-30 se-l mhev auto 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.