Jaguar 4.2 xj6 aut vs Jaguar Xj: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Jaguar 4.2 xj6 aut
58%
MOT pass rate · 3 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Verdict: On MOT pass rate the Jaguar 4.2 xj6 aut (58%) 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 4.2 xj6 aut | Jaguar Xj |
|---|---|---|
| MOT pass rate | 58% | 77% ✓ |
| MOT failure rate | 42% | 23% ✓ |
| Faults & advisories per test | 3.8 | 2.0 ✓ |
| Dangerous-fault share | 0% ✓ | 1% |
| Average mileage | 66,367 mi | 113,306 mi |
| Sample size (vehicles) | 3 | 80,612 |
Most common faults
Jaguar 4.2 xj6 aut
- Parking brake: efficiency below requirements (3.7.B.7)
- Oil leak
- Nearside Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Nearside Windscreen wiper does not clear the windscreen effectively (8.2.2)
- Offside Windscreen wiper does not clear the windscreen effectively (8.2.2)
- Suspension joint nearside upper dust cover split/missing
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 4.2 xj6 aut (58%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Jaguar 4.2 xj6 aut 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.