The Jaguar XJ X350, launched in 2003, represented a major technological leap for the XJ line. It was offered with a range of V6 and V8 engines, including a supercharged XJR variant, and featured modern luxuries such as adaptive air suspension, touchscreen navigation, and park assist. A facelift arrived in 2007 (marking the start of the X358 designation), bringing a refreshed front grille, revised bumpers, new alloy wheels, and updated interior trim. The X350 remained in production until 2009.

The vehicle was fitted with the Jaguar Touch-Screen Navigation System and high end trims were offered with the Jaguar Premium Sound System (by Alpine).