Seat Leon vs Seat Mii by cosmopolitan: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Seat Leon
78%
MOT pass rate · 262,792 vehicles
Seat Mii by cosmopolitan
100%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Seat Leon (78%) and Seat Mii by cosmopolitan (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Seat Leon | Seat Mii by cosmopolitan |
|---|---|---|
| MOT pass rate | 78% | 100% ✓ |
| MOT failure rate | 22% | 0% ✓ |
| Faults & advisories per test | 1.8 | 0.0 ✓ |
| Dangerous-fault share | 3% | — ✓ |
| Average mileage | 103,954 mi | 50,334 mi |
| Sample size (vehicles) | 262,792 | 2 |
Most common faults
Seat Leon
- 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 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 Front Shock absorbers has light misting of oil (5.3.2 (b))
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
Seat Mii by cosmopolitan
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Seat Leon (78%) and Seat Mii by cosmopolitan (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Seat Leon report Full Seat Mii by cosmopolitan 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.