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Mazda 3 vs Mazda Cx-30 se-l mhev: 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
91%
MOT pass rate · 1,561 vehicles
More reliable
Verdict: On MOT pass rate, the Mazda Cx-30 se-l mhev 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
MOT pass rate 78% 91% ✓
MOT failure rate 22% 9% ✓
Faults & advisories per test 2.0 1.1 ✓
Dangerous-fault share 3% ✓ 5%
Average mileage 90,915 mi 32,760 mi
Sample size (vehicles) 164,058 1,561

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

  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. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  4. Offside Rear Shock absorbers has light misting of oil (5.3.2 (b))
  5. Nearside Rear Shock absorbers has light misting of oil (5.3.2 (b))
  6. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate, the Mazda Cx-30 se-l mhev 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 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.