Jaguar 3.8 s vs Jaguar Xj: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Jaguar 3.8 s
70%
MOT pass rate · 4 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Verdict: On MOT pass rate the Jaguar 3.8 s (70%) 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 3.8 s | Jaguar Xj |
|---|---|---|
| MOT pass rate | 70% | 77% ✓ |
| MOT failure rate | 30% | 23% ✓ |
| Faults & advisories per test | 1.2 ✓ | 2.0 |
| Dangerous-fault share | 2% | 1% ✓ |
| Average mileage | 62,913 mi | 113,306 mi |
| Sample size (vehicles) | 4 | 80,612 |
Most common faults
Jaguar 3.8 s
- Nearside Front Upper Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)
- Offside Front Upper Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)
- Horn not working (1.6.2a)
- front offside inner wing starting to corrode.
- Centre steering link bushes slightly deteriorated
- Nearside Front Shock absorber has a light misting of oil (2.7.3)
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 3.8 s (70%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Jaguar 3.8 s 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.