Jaguar 4.2 xj vs Jaguar Xf: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Jaguar 4.2 xj
57%
MOT pass rate · 2 vehicles
Jaguar Xf
81%
MOT pass rate · 116,331 vehicles
Verdict: On MOT pass rate the Jaguar 4.2 xj (57%) and Jaguar Xf (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Jaguar 4.2 xj | Jaguar Xf |
|---|---|---|
| MOT pass rate | 57% | 81% ✓ |
| MOT failure rate | 43% | 19% ✓ |
| Faults & advisories per test | 1.3 ✓ | 1.6 |
| Dangerous-fault share | 0% ✓ | 4% |
| Average mileage | 52,330 mi | 98,854 mi |
| Sample size (vehicles) | 2 | 116,331 |
Most common faults
Jaguar 4.2 xj
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Nearside Windscreen wiper not operating over a large enough area to give an adequate view (8.2.1c)
- Offside Front Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- rear subframe mountings are failing causing metal to metal contact
Jaguar Xf
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear 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))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Rear Sub-frame corroded but not seriously weakened (5.3.3 (b) (i))
- Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
Reliability FAQ
On MOT pass rate the Jaguar 4.2 xj (57%) and Jaguar Xf (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Jaguar 4.2 xj report Full Jaguar Xf 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.