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Ford Fiesta vs Ford Quantum: reliability comparison

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

Ford Fiesta
73%
MOT pass rate · 2,835,744 vehicles
Ford Quantum
72%
MOT pass rate · 15 vehicles
Verdict: On MOT pass rate the Ford Fiesta (73%) and Ford Quantum (72%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Ford Fiesta Ford Quantum
MOT pass rate 73% ✓ 72%
MOT failure rate 27% ✓ 28%
Faults & advisories per test 2.1 1.7 ✓
Dangerous-fault share 2% 1% ✓
Average mileage 84,529 mi 47,600 mi
Sample size (vehicles) 2,835,744 15

Most common faults

Ford Fiesta

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Offside Rear Brake pipe slightly corroded (3.6.B.2c)

Ford Quantum

  1. Parking brake: efficiency below requirements (3.7.B.7)
  2. Offside Rear wheel bearing has slight play (2.6.2)
  3. Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
  4. Service brake: efficiency below requirements (3.7.B.7)
  5. Nearside Rear Inner Anti-roll bar has slight play in a pin/bush (2.4.G.2)
  6. Nearside Steering rack gaiter deteriorated (2.2.D.2d)

Reliability FAQ

On MOT pass rate the Ford Fiesta (73%) and Ford Quantum (72%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Ford Fiesta report Full Ford Quantum 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.