1999 Jaguar XK8 4.0L Petrol · T810 ALR

Exhaust emissions represent the primary mechanical concern for this vehicle, as evidenced by a failure on 9 March 2026 due to carbon monoxide levels exceeding both manufacturer and default limits at idle and fast idle. This failure, following a four-year gap in testing, indicates a decline in combustion efficiency or a failure in the emissions control system. The overall trend suggests a vehicle that has transitioned from a stable state in 2022 to one requiring significant engine or exhaust remediation to meet roadworthiness standards. With a recorded mileage of 67,725 miles over 27 years, the vehicle has averaged approximately 2,508 miles per year, a figure significantly below the national average. This low accumulation rate, combined with a notable absence of MOT records between August 2022 and March 2026, suggests the car has spent extended periods in stationary storage. Such usage patterns often lead to the degradation of rubber components and the accumulation of carbon deposits in the engine and exhaust system, which correlates with the recent emissions failure. A prospective buyer should prioritise the resolution of the exhaust emissions failure, as high carbon monoxide levels typically point to incorrect fuel mixture or catalytic converter inefficiency. During a test drive, listen for any irregularities in the idle or hesitation under acceleration that could indicate fuel system issues. Additionally, the missing central brake pipe clips and supports noted in the March 2026 test require attention to prevent pipe vibration and premature wear, even if the pipes were deemed adequately supported at the time of inspection. The tyre wear patterns recorded on the nearside rear and offside front, specifically the wear on the inner and outer edges, suggest potential alignment issues or worn suspension bushes. During the road test, check for any steering pull or instability at cruising speeds. Finally, the damaged windscreen noted in 2022 should be inspected for any further cracking or degradation that may now compromise the structural integrity of the glass or obstruct the driver's field of vision.