Seat Leon vs Seat Sdi: 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 Sdi
54%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Seat Leon (78%) and Seat Sdi (54%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Seat Leon | Seat Sdi |
|---|---|---|
| MOT pass rate | 78% ✓ | 54% |
| MOT failure rate | 22% ✓ | 46% |
| Faults & advisories per test | 1.8 | 1.7 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 103,954 mi | 116,679 mi |
| Sample size (vehicles) | 262,792 | 1 |
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 Sdi
- Rear wiper blade split
- Nearside Stop lamp not working (1.2.1b)
- Front exhaust section blowing slightly
- Offside Stop lamp not working (1.2.1b)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Rear washer inoperative
Reliability FAQ
On MOT pass rate the Seat Leon (78%) and Seat Sdi (54%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Seat Leon report Full Seat Sdi 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.