Ford Mondeo vs Ford Sierra sapphire lx: 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 Sierra sapphire lx
65%
MOT pass rate · 66,398 vehicles
Verdict: On MOT pass rate the Ford Mondeo (70%) and Ford Sierra sapphire lx (65%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Ford Mondeo | Ford Sierra sapphire lx |
|---|---|---|
| MOT pass rate | 70% ✓ | 65% |
| MOT failure rate | 30% ✓ | 35% |
| Faults & advisories per test | 2.2 | 0.0 ✓ |
| Dangerous-fault share | 1% | — ✓ |
| Average mileage | 130,467 mi | 64,738 mi |
| Sample size (vehicles) | 1,212,823 | 66,398 |
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 Sierra sapphire lx
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Ford Mondeo (70%) and Ford Sierra sapphire lx (65%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Ford Mondeo report Full Ford Sierra sapphire lx 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.