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Jaguar Mark9 vs Jaguar Xj: reliability comparison

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

Jaguar Mark9
50%
MOT pass rate · 1 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Verdict: On MOT pass rate the Jaguar Mark9 (50%) 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 Mark9 Jaguar Xj
MOT pass rate 50% 77% ✓
MOT failure rate 50% 23% ✓
Faults & advisories per test 4.5 2.0 ✓
Dangerous-fault share 0% ✓ 1%
Average mileage 66,076 mi 113,306 mi
Sample size (vehicles) 1 80,612

Most common faults

Jaguar Mark9

  1. Front Brake pipe slightly corroded (3.6.B.2c)
  2. Handbrake slightly low
  3. Offside Rear brake caliper leaking (3.6.A.1)
  4. Oil leak
  5. Rear Brake pipe slightly corroded (3.6.B.2c)
  6. Slight leak from steering box

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 Mark9 (50%) and Jaguar Xj (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Jaguar Mark9 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.