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Mazda 3 vs Mazda 6 gt sport 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 6 gt sport auto
92%
MOT pass rate · 264 vehicles
More reliable
Verdict: On MOT pass rate, the Mazda 6 gt sport auto is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Mazda 3 Mazda 6 gt sport auto
MOT pass rate 78% 92% ✓
MOT failure rate 22% 8% ✓
Faults & advisories per test 2.0 0.7 ✓
Dangerous-fault share 3% 3%
Average mileage 90,915 mi 32,921 mi
Sample size (vehicles) 164,058 264

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 6 gt sport auto

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

Reliability FAQ

On MOT pass rate, the Mazda 6 gt sport auto is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Mazda 3 report Full Mazda 6 gt sport 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.