Ford Fiesta vs Ford Sierra ghia i: 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 Sierra ghia i
62%
MOT pass rate · 20,884 vehicles
Verdict: On MOT pass rate the Ford Fiesta (73%) and Ford Sierra ghia i (62%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Ford Fiesta | Ford Sierra ghia i |
|---|---|---|
| MOT pass rate | 73% ✓ | 62% |
| MOT failure rate | 27% ✓ | 38% |
| Faults & advisories per test | 2.1 | 0.0 ✓ |
| Dangerous-fault share | 2% | — ✓ |
| Average mileage | 84,529 mi | 64,873 mi |
| Sample size (vehicles) | 2,835,744 | 20,884 |
Most common faults
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)
Ford Sierra ghia i
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Ford Fiesta (73%) and Ford Sierra ghia i (62%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Ford Fiesta report Full Ford Sierra ghia i 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.