How interchangeable are the parts in a 2002 Jaguar xtype and a 05 Jaguar xtype? I have the 02 but want to know if I can use the 05 as a parts car.

 

Most parts are interchangeable. Where you have issues is around the fuse boxes. The fuse boxes are wired differently and numbered the fuses differently. Some of the computers may be "too new" for the 02 car you are looking to keep running. So, that may be an issue, but you won't know until you try.