Ford Cobra 427 vs Ford Fiesta: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Ford Cobra 427
54%
MOT pass rate · 3 vehicles
Ford Fiesta
73%
MOT pass rate · 2,835,744 vehicles
Verdict: On MOT pass rate the Ford Cobra 427 (54%) and Ford Fiesta (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Ford Cobra 427 | Ford Fiesta |
|---|---|---|
| MOT pass rate | 54% | 73% ✓ |
| MOT failure rate | 46% | 27% ✓ |
| Faults & advisories per test | 4.3 | 2.1 ✓ |
| Dangerous-fault share | 6% | 2% ✓ |
| Average mileage | 23,262 mi | 84,529 mi |
| Sample size (vehicles) | 3 | 2,835,744 |
Most common faults
Ford Cobra 427
- Parking brake lever has little reserve travel (3.1.6b)
- Front wheel bearing has slight play (2.5.A.3c)
- Steering system slightly tight (2.2.D.1)
- Rear Brake pipe slightly corroded (3.6.B.2c)
- Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
- n/s door little loose
Ford Fiesta
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Brake pipe slightly corroded (3.6.B.2c)
Reliability FAQ
On MOT pass rate the Ford Cobra 427 (54%) and Ford Fiesta (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Ford Cobra 427 report Full Ford Fiesta 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.