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Jaguar Xj vs Jaguar Xk120r: reliability comparison

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

Jaguar Xj
77%
MOT pass rate · 80,612 vehicles
Jaguar Xk120r
88%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Jaguar Xj (77%) and Jaguar Xk120r (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Jaguar Xj Jaguar Xk120r
MOT pass rate 77% 88% ✓
MOT failure rate 23% 12% ✓
Faults & advisories per test 2.0 0.4 ✓
Dangerous-fault share 1% ✓ 33%
Average mileage 113,306 mi 3,725 mi
Sample size (vehicles) 80,612 1

Most common faults

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)

Jaguar Xk120r

  1. Nearside Rear Rear wheel bearing has slight play (2.6.2)
  2. Offside Rear Rear wheel bearing has slight play (2.6.2)
  3. Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))

Reliability FAQ

On MOT pass rate the Jaguar Xj (77%) and Jaguar Xk120r (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Jaguar Xj report Full Jaguar Xk120r 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.