2010 Jaguar XJ 3.0L Diesel · SM10 AAV

The most recent MOT test on the Jaguar XJ, conducted on 2026-08-24, resulted in a clean pass with no recorded defects, marking a positive turnaround from its previous failure in 2024-09-10. This outcome suggests a stabilization in the vehicle’s roadworthiness, though the history reveals a notable pattern of advisories and a single major failure related to structural and safety components. The three consecutive clean MOTs since 2023-09-12 indicate that while the vehicle has faced wear-related issues—particularly in suspension, corrosion, and braking systems—these have either been addressed or are now under controlled conditions. However, the presence of persistent advisories, such as rear sub-frame corrosion and brake hose corrosion, underscores the need for proactive maintenance to prevent escalation into major defects, especially given the vehicle’s advanced age and accumulated mileage. The recorded mileage of 141,208 miles for a 2010 XJ reflects a moderate annual usage rate of approximately 8,826 miles per year, which is typical for a vehicle of this age and class. Such mileage accumulation is consistent with regular, moderate driving rather than heavy or light usage extremes, though the gap between the 2024 failure and the 2026 MOT—over two years—could imply periods of reduced or stationary operation. Heavy mileage alone does not inherently indicate poor maintenance, but it accelerates wear on critical systems like suspension components, brake assemblies, and drivetrain elements. The front coil spring failure in 2024 highlights how prolonged exposure to stress, whether from driving habits or environmental factors, can lead to catastrophic failures in high-stress areas such as the offside front suspension. Additionally, standing the vehicle for extended periods can exacerbate issues like brake disc corrosion, caliper binding, and fluid degradation, which are all factors to monitor closely. Given the vehicle’s history, the buyer should prioritise a thorough inspection of the suspension system, focusing on the rear sub-frame corrosion advisories from past MOTs. Corrosion in the rear sub-frame, if not addressed, could compromise structural integrity and lead to alignment or control arm failures, which are critical for handling and safety. On a test drive, listen for unusual suspension clunks or rattles, particularly around the rear axles, and check for uneven tyre wear patterns that may indicate misalignment or binding components. The brake system should also be scrutinised: watch for brake shudder or pulsation during deceleration, which could signal warped discs or binding calipers, and inspect the brake hoses for any signs of cracking or excessive corrosion that might compromise hydraulic function. The advisories regarding brake hose corrosion and brake pad warning wire breaks suggest that the braking system has been subjected to wear, and further inspection is warranted to ensure consistent performance and avoid potential failure. Beyond the mechanical checks, the buyer should address the registration plate issues noted in the 2024 MOT failure, ensuring compliance with current UK regulations, as these are not only mandatory for roadworthiness but also for legal ownership. For the 12-year-old XJ, the age and mileage make it prudent to verify the condition of the tyres for signs of sidewall cracking or perishing, which can compromise safety and reduce tread life. The 12V battery should be tested for voltage output and overall health, as older vehicles are more susceptible to electrical gremlins, especially if the vehicle has been stationary for extended periods. Additionally, since the vehicle’s last service record is not provided, the buyer should consider a comprehensive fluid check, including brake fluid, coolant, and differential/transmission fluids, as these degrade over time regardless of mileage. Finally, if the vehicle has not been serviced in the past two years, a full mechanical inspection by a qualified Jaguar specialist is recommended to address the remaining advisories and ensure the suspension, braking, and drivetrain components remain reliable for the foreseeable future.