Jaguar 420 auto vs Jaguar S-type: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Jaguar 420 auto
50%
MOT pass rate · 1 vehicles
Jaguar S-type
75%
MOT pass rate · 61,983 vehicles
Verdict: On MOT pass rate the Jaguar 420 auto (50%) and Jaguar S-type (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Jaguar 420 auto | Jaguar S-type |
|---|---|---|
| MOT pass rate | 50% | 75% ✓ |
| MOT failure rate | 50% | 25% ✓ |
| Faults & advisories per test | 4.0 | 2.1 ✓ |
| Dangerous-fault share | 0% ✓ | 1% |
| Average mileage | 47,479 mi | 114,746 mi |
| Sample size (vehicles) | 1 | 61,983 |
Most common faults
Jaguar 420 auto
- 1.All front swivel joint boots are split. †2.Engine has bad oil leak. †3.Cut marks in drivers seat belt webbing. †4.Corrossion at front and rear chassis areas, and both body sills.
- Air/vacuum reservoir slightly corroded (3.6.A.2b)
- Brake master cylinder/servo mounting prescribed area is corroded but not considered excessive (3.6.C.3)
- Front suspension has slight play in a lower suspension ball joint (2.5.B.1a)
- Nearside Windscreen washer provides insufficient washer liquid (8.2.3)
- Rear Suspension arm rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)
Jaguar S-type
- 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)
- Under-trays fitted obscuring some underside components
- Front Brake pad(s) wearing thin (3.5.1g)
Reliability FAQ
On MOT pass rate the Jaguar 420 auto (50%) and Jaguar S-type (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Jaguar 420 auto report Full Jaguar S-type 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.