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Jaguar 420 s vs Jaguar Xj: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Jaguar 420 s
75%
MOT pass rate · 1 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Verdict: On MOT pass rate the Jaguar 420 s (75%) 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 420 s Jaguar Xj
MOT pass rate 75% 77% ✓
MOT failure rate 25% 23% ✓
Faults & advisories per test 1.8 ✓ 2.0
Dangerous-fault share 0% ✓ 1%
Average mileage 90,428 mi 113,306 mi
Sample size (vehicles) 1 80,612

Most common faults

Jaguar 420 s

  1. Nearside Front wheel bearing has slight play (2.5.A.3c)
  2. Offside Rear wheel bearing has slight play (2.6.2)
  3. Nearside Rear Rear wheel bearing has slight play (2.6.2)
  4. Offside Rear Rear wheel bearing has slight play (2.6.2)
  5. Nearside Rear wheel bearing has slight play (2.6.2)
  6. nearside front bottom suspension ball joint boot split

Jaguar Xj

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Nearside Front wheel bearing has slight play (2.5.A.3c)
  6. Offside Front wheel bearing has slight play (2.5.A.3c)

Reliability FAQ

On MOT pass rate the Jaguar 420 s (75%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Jaguar 420 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.