Jaguar Mark 8 vs Jaguar Xj: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Jaguar Mark 8
91%
MOT pass rate · 1 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Verdict: On MOT pass rate the Jaguar Mark 8 (91%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Jaguar Mark 8 | Jaguar Xj |
|---|---|---|
| MOT pass rate | 91% ✓ | 77% |
| MOT failure rate | 9% ✓ | 23% |
| Faults & advisories per test | 0.0 ✓ | 2.0 |
| Dangerous-fault share | — ✓ | 1% |
| Average mileage | 45,997 mi | 113,306 mi |
| Sample size (vehicles) | 1 | 80,612 |
Most common faults
Jaguar Mark 8
- Offside Registration plate lamp not working (1.1.C.1d)
Jaguar Xj
- 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 the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Front wheel bearing has slight play (2.5.A.3c)
- Offside Front wheel bearing has slight play (2.5.A.3c)
Reliability FAQ
On MOT pass rate the Jaguar Mark 8 (91%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Jaguar Mark 8 report Full Jaguar Xj 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.