2009 Jaguar XK 4.2L Petrol · JB59 XKB

The defining mechanical story of this 2009 Jaguar XK is a brake system that has repeatedly been pushed to its limits. The history contains two MOT failures, both attributed to brake pad wear, with the 2021 test recording rear pads at less than 1.5 mm, classified as Dangerous, alongside front pads down to 5 mm. The 2022 test then recorded rear pads worn down to the wear indicator. Compounding the concern, the same 2021 test flagged all brake discs as corroded, pitted or scored. While the vehicle has passed each subsequent test from 2022 through to its most recent pass on 12 June 2025, the absence of any recorded brake disc or pad advisories since that point suggests only that fresh components were fitted, not necessarily that subsequent brake wear has been monitored on the rolling road. A pattern of brake components reaching end-of-life on multiple consecutive tests is a material risk factor for a prospective buyer, particularly given the known susceptibility of Jaguar brake systems to accelerated pad wear if calipers bind or slide seize. Annual mileage for this seventeen-year-old vehicle works out to roughly 2,617 miles per year, which is unusually low for the age and suggests extended periods of standing between uses rather than regular driving. The MOT record itself reflects this irregular usage, with no test recorded for 2020 and a gap between the 2021 and 2019 entries, while mileage progression between recorded tests appears modest. Low annual mileage of this nature brings specific mechanical considerations: brake discs and pads can corrode and pit through lack of use, which aligns directly with the corrosion advisories recorded in 2021, and standing for prolonged periods can encourage moisture ingress in brake hydraulic systems, deterioration of suspension bushes and dampers through static loading, and degradation of flexible components such as coolant and fuel hoses. The advisory noting under trays fitted obscuring some underside components, present at the 2021 and 2022 tests, is also relevant here, as these panels can mask early-stage corrosion on subframes and suspension arms in a car of this age that has seen limited but consistent road exposure. For a prospective buyer, the priority on inspection is the brake system and its supporting hydraulics. The front and rear pads, all discs and the caliper slide mechanisms should be physically examined for remaining friction material, lipping or scoring on disc edges, and freedom of caliper movement. Brake fluid age should be confirmed, and a firm pedal with no sponginess or travel under load verified on a road test, with particular attention to any pull to one side under braking that would suggest a binding caliper. Listen for any scraping, grinding or squeal that would indicate pad wear sensors contacting the discs, and inspect the flexible brake hoses for cracking or bulging, particularly at the unions where age-related deterioration is common on a vehicle that has stood for long intervals. Suspension and underbody condition warrants close scrutiny, particularly given the under trays documented in earlier tests. Request that these be removed for inspection, as the subframe mounting points, front suspension lower arms and their bushes, anti-roll bar drop links and rear suspension components are all areas where corrosion can develop unseen on a Jaguar XK of this vintage. On a test drive, listen for clonks or knocking from the front end over speed humps and uneven surfaces, which would indicate worn bushes or droplinks, and feel for any vagueness or knocking through the steering wheel that could point to track rod or wishbone wear. Tyre condition is also worth a careful visual check, as the history shows repeated nail-in-tyre advisories on the nearside front and offside rear across consecutive years from 2021 to 2025, alongside recorded sidewall cuts that have been borderline but legal; this pattern is unusual and may indicate either repeated kerbing or that the tyres in question are ageing in situ despite limited mileage, in which case the DOT manufacture date and any sidewall cracking or perishing should be examined directly. Finally, verify that the headlamp cleaning device flagged as inoperative in 2021 has been repaired and is functioning on both sides, as this is a mandatory item and its status is not separately recorded in subsequent passes.