Skip to content

Jaguar Sovereign vs Jaguar Xj: reliability comparison

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

Jaguar Sovereign
75%
MOT pass rate · 2,563 vehicles
Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
More reliable
Verdict: On MOT pass rate, the Jaguar Xj is the more reliable of the two — 77% pass first time versus 75%. It's one signal among several; check the full breakdown below.

Head to head

Measure Jaguar Sovereign Jaguar Xj
MOT pass rate 75% 77% ✓
MOT failure rate 25% 23% ✓
Faults & advisories per test 2.1 2.0 ✓
Dangerous-fault share 1% 1%
Average mileage 110,730 mi 113,306 mi
Sample size (vehicles) 2,563 80,612

Most common faults

Jaguar Sovereign

  1. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Parking brake: efficiency below requirements (3.7.B.7)
  4. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Oil leak

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 Xj is the more reliable of the two — 77% pass first time versus 75%. It's one signal among several; check the full breakdown below.

Full Jaguar Sovereign 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.