2004 Jaguar XJ 4.2L Petrol · BL04 XMS

Corrosion of the integral body structure and recurring issues with braking and suspension components define the mechanical profile of this Jaguar XJ. The most recent test on 07 August 2026 resulted in a pass, but it follows a dangerous failure in July 2026 regarding exposed tyre cords and a major failure involving headlamp aim. The recorded advisories show a persistent trend of structural and fluid-related concerns, specifically regarding offside front integral body structure corrosion in the footwell and inner sill area, alongside an oil leak and a corroded offside brake pipe near the rear axle. The vehicle has covered 145,861 miles over its 22-year lifespan, representing an average annual accumulation of approximately 6,630 miles. This usage pattern is consistent with typical low-to-moderate annual mileage for a vehicle of this age. Mechanically, this level of usage suggests that while the drivetrain may not have faced extreme high-speed motorway mileage, the vehicle has been subject to the progressive degradation typical of long-term exposure, particularly regarding rubber components and metal oxidation. Prospective buyers should pay close attention to the documented structural integrity and braking system. The advisory regarding corrosion in the footwell and inner sill area requires careful inspection to ensure the oxidation is not progressing toward a failure of structural rigidity. Furthermore, the presence of a corroded offside brake pipe and a nearside rear brake hose with ferrule corrosion necessitates a thorough check of the entire hydraulic system. During a test drive, any sponginess in the brake pedal or a change in pedal feel could indicate issues with these lines or the reported oil leaks. Suspension and tyre wear also warrant immediate scrutiny. The history shows repeated advisories for uneven tyre wear, particularly on the inner edges, and previous failures for exposed ply. This often points to underlying suspension geometry issues or worn components such as the ball joints and shock absorber bushes previously flagged in the 2024 and 2025 records. On the road, listen for knocking or clunking sounds when traversing uneven surfaces, which may indicate worn suspension bushes or ball joints, and check for any steering pull or instability that could stem from the documented tyre and steering component wear.