I just bought a 2004 vanden plas with one key that works and two after market keys that cannot be programed . I tried all the prgraming ways on you tube to no avail jaguar dealers say you have to buy from them for them to program it , they will not program an after market key, am I wasting my time trying to get them to work, or is there a way to do it , thanks in advance.

 

Welcome to the forums Chooman,

I've removed a duplicate post of this question here in Canada Region forum and another you posted in X-Type forum. Technical questions should be posted in the relevant model forum and for your 2004 XJ8 this is:
https://www.jaguarforums.com/forum/x...-x350-x358-28/

At the top of X350 forum you will find X350/X358 - 'How To' / DIY Repair & Maintenance thread. Section 13 has information on KEY FOB/REMOTE.

Graham