XK8/X350/S-TYPE/XF Adaptive Cruise Radar. Fits XK8 Models X350 Models S-Type models also fits XF models, This is a very rare item, They are no longer available from Jaguar. Check part number against yours before ordering. JAGUAR PART NUMBER: 4R839G768AA. This part superceeds alot. If you have any questions regarding this item please contact me.