Ford Focus vs Ford Mercury cougar: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Ford Focus
74%
MOT pass rate · 2,068,317 vehicles
Ford Mercury cougar
83%
MOT pass rate · 5 vehicles
Verdict: On MOT pass rate the Ford Focus (74%) and Ford Mercury cougar (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Ford Focus | Ford Mercury cougar |
|---|---|---|
| MOT pass rate | 74% | 83% ✓ |
| MOT failure rate | 26% | 17% ✓ |
| Faults & advisories per test | 1.9 | 1.0 ✓ |
| Dangerous-fault share | 2% | 0% ✓ |
| Average mileage | 107,385 mi | 33,284 mi |
| Sample size (vehicles) | 2,068,317 | 5 |
Most common faults
Ford Focus
- 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)
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Ford Mercury cougar
- End float rear differential
- Centre Front Seat belt locking mechanism does not secure or release (5.2.5a)
- Centre Registration plate lamp not working (1.1.C.1d)
- Nearside Front Ball joint has slight play (2.2.B.1f)
- Nearside Rear Direction indicator incorrect colour (1.4.A.2f)
- Offside Front Seat belt locking mechanism does not secure or release (5.2.5a)
Reliability FAQ
On MOT pass rate the Ford Focus (74%) and Ford Mercury cougar (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Ford Focus report Full Ford Mercury cougar 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.