1998 Jaguar XK8 4.0L Petrol · S951 AJO

A 28-year-old Jaguar XK8 carrying 165,487 miles presents a roadworthiness record defined by repeated suspension, braking and structural advisories alongside three recent MOT failures, none of which have yet pointed to a single catastrophic defect but several of which form a clear wear pattern. The August 2026 test ultimately went down as a pass, but only after a same-day failed attempt was rectified when the offside headlamp aim was corrected, and that fail came just one month after a July 2026 failure covering the same headlamp defect together with exhaust carbon monoxide and Lambda exceedances. Five of the six recorded advisories and failures touch on either the front shock absorber bushes, the offside rear tyre edge wear, or the front brake discs, with anti-roll bar linkage wear also now flagged, suggesting an accumulating chassis and tyre geometry issue rather than isolated component fatigue. Mileage context for this XK8 is unusually low at roughly 5,910 miles per year over its 28-year life, and the MOT history reflects that restrained usage with tests recorded in 2024, 2025 and twice in 2026, indicating the car has been exercised and presented for testing with reasonable regularity rather than left dormant. However, low annual mileage on a Jaguar of this era is a mixed mechanical proposition because it tends to amplify the symptoms already flagged in the record: tyres develop flat-spotting and uneven shoulder wear from short, cold-start journeys, brake discs pit and corrode on the faces due to infrequent high-temperature cycling, and rubber bushes in the suspension dry out and oxidise without the working heat generated by sustained driving. The underseal advisories appearing in both 2024 and 2025, combined with the corrosion recorded on the offside rear sill and offside front floor structure, indicate that the protective coating is doing the visible work of masking the extent of any developing body corrosion on a car of this age. For a prospective buyer, the immediate priorities are the items that drove the recent failures. The headlamp aim issue on the offside should be verified as a properly adjusted unit rather than evidence of a fractured mounting or worn levelling mechanism, while the exhaust Lambda and CO exceedances recorded in July 2026 warrant scrutiny of the front Lambda sensor, the catalytic converter efficiency and any intake or vacuum leaks that could be skewing the mixture on the 4.2-litre V8. Front brake disc condition should be physically inspected for lip measurement and scored face severity rather than relied upon at face value from the advisory wording, and the offside rear tyre should be checked for uneven inner or outer edge wear that could point to rear suspension geometry or camber faults rather than simple age-related wear. On the road, listen for clonks or squeaks from the front strut tops and anti-roll bar links over uneven surfaces, feel for vibration through the brake pedal that would indicate the pitted discs are now beyond their service limit, and check for pulling under braking that could reveal a binding caliper. Finally, the structural and underbody items deserve a hands-on inspection rather than a visual glance. The brake pipes being coated to manage corrosion is a recurring advisory, so a thorough check underneath for live rust, flaking at the pipe unions and condition of the fuel and brake lines along the chassis rails is essential, as is a close look at the offside rear sill and offside front floor for perforation rather than just surface corrosion. The slight power steering rack seepage noted in 2024 should be re-examined for any progression to a drip or fluid loss, and the suspension component condition should be checked with the vehicle on a ramp if possible to confirm whether the shock absorber bushes and anti-roll bar link have simply surface-worn or have moved beyond the advisory threshold. A test drive on mixed road surfaces should include steady-state cornering to expose any knocking from worn linkages, firm braking from around 40 mph to judge pedal feel and disc integrity, and a careful listen at idle for misfires that might still be linked to the recent exhaust failures.