2004 Jaguar S-Type 3.0L Petrol · AF54 JHO

A chronic pattern of structural corrosion advisories and a single failed test on basic electrical items define the mechanical history of this Jaguar S-Type. The most recent MOT on 8 January 2026 was recorded as a pass, but it carried a minor defect for a deteriorated upper suspension arm ball joint dust cover on the offside front, and the broader trend across the last six tests shows a vehicle steadily accruing advisories relating to floor pans, sills and rear body structure. The 2025 test flagged corrosion on the back inner sill, 2024 recorded both sills as corroding and a binding offside rear brake, and 2021 noted nearside sill corrosion alongside a brake pipe covered in grease or other material. A 2021 failure for an inoperative engine management indicator lamp, an ineffective wiper and a non-functional nearside headlamp main beam is consistent with electrical and minor lighting faults that, while not catastrophic, point to a vehicle where ancillary components require ongoing attention. The underbody was also separately recorded as being in poor condition at the 2022 test. With 128,017 miles spread over roughly 22 years, this S-Type has covered an average of about 5,800 miles annually, which is low for a vehicle of its age and suggests either genuinely light use or extended periods off the road. The MOT record itself shows a noticeable gap between the August 2019 test and the January 2021 test, which could reflect a period of non-use or exemption, and the tests since then have been conducted on an almost annual basis with mileage accumulation that appears modest. Low annual mileage of this nature tends to be kinder to high-wear drivetrain components but can simultaneously accelerate underbody corrosion through standing in damp conditions, and the repeated sill and underbody advisories across multiple tests align with that pattern. Standing time also allows brake components to seize, which is relevant given the recorded rear brake binding advisory and the corroded brake pipe history. For a prospective buyer, the priority areas to examine physically are the lower sills, inner sill structures, rear wheel arches and any underbody seams visible from beneath the car, looking for perforation rather than surface scale, particularly along the nearside sill which has been flagged repeatedly between 2021 and 2024. The brake pipes running from the main line to the rear axle should be inspected for corrosion pitting and the protective coating condition, and the rear brake should be checked for free running as a binding caliper or sticking handbrake mechanism has been previously noted. On the suspension side, the offside front upper arm ball joint dust cover deterioration flagged in 2026 should be inspected for fresh grease contamination around the joint and any perceptible play when the wheel is rocked by hand, while the nearside rear upper arm inner bush noted in 2021 warrants a listen for clonking or knocking over uneven surfaces. During a road test, the buyer should pay particular attention to steering precision and any vagueness through the centre position, which would suggest wear in the front suspension linkages, and any pulling to one side under braking that could indicate a seized slide pin or uneven disc wear given the 2022 advisory on the nearside front disc. The engine management light should illuminate on ignition and extinguish once running, addressing the 2021 major failure point, and both headlamp main beams plus wiper function across both speeds should be verified as part of a basic electrical systems check. Brake pedal feel should be firm without excessive travel, and the handbrake should hold on a moderate incline without requiring excessive lever travel. Finally, a thorough inspection underneath on a ramp is strongly advisable before purchase, given the consistent underbody and sill corrosion pattern documented across four separate MOT tests.