1990 Jaguar XJS 5.3L Petrol · H860 BND

The most recent MOT test on 12 August 2026 resulted in a pass, although the same date also records a prior failure attributed to the windscreen washer providing insufficient washer liquid, which is a minor and easily rectified issue typically resolved by topping up the reservoir or clearing a blocked nozzle. More noteworthy is the recurring advisory concerning corrosion at the nearside and offside front subframe mounting prescribed areas on the inner wing, noted in 2024, 2025, and again in 2026. The presence of these advisories across three consecutive tests demonstrates an established pattern rather than an isolated observation, and while the examiner has consistently judged the corrosion not to be excessive, the buyer should recognise that subframe mounting areas are critical structural and suspension attachment points. Continued progression of this corrosion could compromise alignment, handling precision, and ultimately structural integrity, warranting close physical inspection beneath the vehicle and possibly a borescope examination of the mounting pockets to establish the true extent of any section loss. With a recorded mileage of 72,668 miles over an approximate 36-year lifespan, the vehicle averages just over 2,000 miles annually, which is exceptionally low and strongly suggests extended periods of standing or only intermittent use. The MOT history reflects this pattern, with no test recorded at all in 2022 and a complete absence of advisory notices or failures between 2019 and 2023. Such prolonged inactivity carries its own mechanical consequences, including accelerated deterioration of rubber components, oxidation of brake discs and caliper slides, fluid degradation irrespective of mileage, and potential moisture accumulation in the engine and gearbox sumps. Furthermore, the relatively short distances typically associated with such low annual use are generally insufficient to prevent moisture and unburned fuel from contaminating the oil, nor to keep the catalytic converter and exhaust system operating at the temperatures required to expel condensation. Given the documented pattern of inner wing corrosion and the fact that the vehicle has been in service for over three decades, a prospective buyer should arrange for the vehicle to be raised on a ramp or placed over an inspection pit to allow thorough visual examination of the front subframe mounts, chassis outriggers, jacking points, and sill closing panels, as corrosion in these areas is known to proliferate on older Jaguars and may not be fully visible from above. Particular attention should be paid to the areas immediately surrounding the front suspension turrets and lower suspension arms, where rust is frequently encountered. A test drive should incorporate rough or uneven road surfaces to listen for clonks or rattles from the front suspension, which would indicate worn bushes, top mounts, or anti-roll bar linkages, as well as uneven or wandering steering response that might point to subframe movement or compromised geometry. Additionally, it would be prudent to inspect the inner edges of the front tyres for any uneven wear, as the advisory in 2025 specifically highlighted inner-edge wear on both front tyres, which is commonly associated with worn suspension bushes, incorrect tracking, or deteriorated thrust arms rather than simple tyre ageing. Beyond the corrosion concerns, the low-mileage standing profile demands that several time-based service items be thoroughly checked rather than assumed adequate on the basis of odometer reading alone. Brake discs on vehicles that stand for extended periods frequently suffer from rust scaling, lipping, and binding caliper pistons, so each corner should be inspected for smooth rotation when the wheels are free and for any evidence of uneven pad wear or sticking sliders. The 12-volt battery is likely to have been subjected to numerous discharge and recharge cycles through inactivity, and its age, state of charge, and load test results should be verified, ideally using a diagnostic tool to confirm the alternator is maintaining correct voltage. Coolant, brake fluid, power steering fluid, and engine oil should all be regarded as overdue for replacement based on calendar age rather than mileage, with brake fluid being particularly critical due to its hygroscopic nature and the safety implications of degraded performance. The fuel system, including the injectors and fuel rail, should be checked for varnish and deposits consistent with long storage, while the tyres themselves warrant careful inspection for sidewall cracking, perishing, and age-related degradation regardless of tread depth, as rubber compounds deteriorate significantly with time. Verifying the continuity of service history stamps and any supporting invoices will be essential in confirming that age-sensitive maintenance has been diligently carried out on what is otherwise a classic vehicle requiring preservation rather than purely mileage-driven servicing.