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Mazda 3 vs Mazda 323 se executive a: reliability comparison

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

Mazda 3
78%
MOT pass rate · 164,058 vehicles
More reliable
Mazda 323 se executive a
66%
MOT pass rate · 1,586 vehicles
Verdict: On MOT pass rate, the Mazda 3 is the more reliable of the two — 78% pass first time versus 66%. It's one signal among several; check the full breakdown below.

Head to head

Measure Mazda 3 Mazda 323 se executive a
MOT pass rate 78% ✓ 66%
MOT failure rate 22% ✓ 34%
Faults & advisories per test 2.0 1.8 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 90,915 mi 94,162 mi
Sample size (vehicles) 164,058 1,586

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 323 se executive a

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Nearside Front constant velocity joint gaiter split (2.5.C.1a)

Reliability FAQ

On MOT pass rate, the Mazda 3 is the more reliable of the two — 78% pass first time versus 66%. It's one signal among several; check the full breakdown below.

Full Mazda 3 report Full Mazda 323 se executive a 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.