2003 Jaguar XK8 4.2L Petrol · AJ03 DDA

The most recent MOT test on 2026-08-20 resulted in a passing grade, though it highlighted a persistent advisory regarding slight power steering rack seepage and a minor windscreen damage that does not impair visibility. Despite this, the vehicle’s overall maintenance history over the past three years shows a concerning pattern of recurring failures, particularly in the engine and ABS systems. The 2025 and 2024 MOTs were clean apart from minor advisories, yet the 2025-08-12 and 2026-08-19 tests both failed due to engine and ABS faults, indicating a failure to address underlying issues between tests. This suggests either a lack of proactive maintenance or deeper mechanical wear that has not yet escalated to critical failure points. The vehicle’s performance during the latest MOT suggests it is still roadworthy, but the history of repeated failures demands immediate attention to prevent further degradation. The recorded mileage of 58,306 miles for a vehicle aged approximately 23 years represents an unusually low annual usage rate of around 2,535 miles per year, which is far below the typical wear rates expected for a high-performance vehicle like the Jaguar XK8. Such low mileage can lead to several critical issues, particularly in components that degrade over time rather than through use, such as seals, fluids, and structural elements. The extended periods of inactivity may also contribute to standing corrosion in brake systems, particularly on the rear discs and calipers, where moisture and road salt can accelerate rust formation. Additionally, the power steering system, which has shown persistent seepage, is more susceptible to failure when stationary for long durations, as fluid can degrade or dry out, leading to stiffness or complete loss of assist. Given the vehicle’s age and the recurring advisories and failures, the buyer should prioritise a thorough mechanical inspection to confirm the condition of the power steering rack and associated hydraulic components. The slight seepage observed in the latest MOT is a warning sign that the rack seal may be compromised, leading to power steering fluid loss and potential loss of assist, which could become critical during hard braking or cornering. Listen for any unusual clunking or grinding noises from the suspension during a test drive, particularly when the vehicle is stationary or moving slowly, as this may indicate worn suspension bushes or coil spring damage. Inspect the rear tyres for uneven wear patterns, which could signal misalignment or suspension issues, and check for any signs of brake shudder or pulsation when applying the brakes, as this may indicate warped discs or binding calipers. For the engine and ABS systems, which have both failed in recent MOTs, the buyer should verify the presence of a valid service history, particularly for the engine control unit (ECU) and ABS modules, as these components can fail due to electrical or software issues. The engine MIL (Malfunction Indicator Lamp) failure suggests a persistent fault that has not been resolved, which could stem from a failing sensor, wiring harness, or more serious internal engine wear. Test the ABS system by driving at various speeds and cornering conditions, paying close attention to whether the brake lights respond uniformly and whether the vehicle maintains stable stopping distances. If the ABS warning persists, a professional diagnostic check is essential to identify whether the issue is electrical or mechanical. Additionally, given the vehicle’s age, inspect the tyre sidewalls for signs of perishing or cracking, which can compromise structural integrity and safety, even if the tread remains legal. Check the battery terminals for corrosion and ensure the 12V battery has sufficient charge, as standing vehicles can lead to battery drain if the alternator is not functioning correctly. Finally, consider a fluid top-up for the power steering, brake, and coolant systems, as these fluids degrade over time and can lead to premature failure if not replaced.