Ford Mondeo vs Ford Seirra: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Ford Mondeo
70%
MOT pass rate · 1,212,823 vehicles
Ford Seirra
80%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Ford Mondeo (70%) and Ford Seirra (80%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Ford Mondeo | Ford Seirra |
|---|---|---|
| MOT pass rate | 70% | 80% ✓ |
| MOT failure rate | 30% | 20% ✓ |
| Faults & advisories per test | 2.2 ✓ | 2.8 |
| Dangerous-fault share | 1% | 0% ✓ |
| Average mileage | 130,467 mi | 81,080 mi |
| Sample size (vehicles) | 1,212,823 | 2 |
Most common faults
Ford Mondeo
- 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)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Parking brake: efficiency below requirements (3.7.B.7)
- Front Brake pad(s) wearing thin (3.5.1g)
Ford Seirra
- Nearside Rear Brake pipe excessively corroded (3.6.B.2c)
- Front Brake pipe excessively corroded (3.6.B.2c)
- Front coil spring fractured (2.4.C.1a)
- Nearside Front Headlamp not in good working order adversely affecting beam image (1.2.4a)
- Nearside Rear Exhaust has a major leak of exhaust gases (7.1.2)
- Offside Exhaust has a major leak of exhaust gases (7.1.2)
Reliability FAQ
On MOT pass rate the Ford Mondeo (70%) and Ford Seirra (80%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Ford Mondeo report Full Ford Seirra 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.