Originally Posted by Muti007

I have to ask,not to be rude, has this ever worked for anyone? Ive tried it numerous times with no success. I have 2 OEM working keys but since I changed my battery my key with the Jag growler doesnt turn on the car. It turns everything else on, but wont get the car to start. what am I doing wrong?

Originally Posted by Box

You can use this

Originally Posted by Muti007

Unfortunately I have a 98 XJR so this doesnt apply to me

Originally Posted by xjrguy

Alan,

Get both keys and sit in the car. Find the two black domes at the center of the fascia near the windscreen. Take the key that won't start the car and insert it. Watch the left side of the front dome and turn the key on. See what it does, light up solid or flash. [when you use the good key, it will stay on solid] If it flashes, the key is either not programmed to the security system, or the key housing has lost the transponder pellet. If you separate the remote from the key portion, on the side of the housing opposite the key blade, there should be a small white silicone capsule in a recess. That is the transponder. No pellet, no start.

After you check that out, tell me how many keys you have that WILL start the car.
[just to clarify, we are talking about the '06 XJ, right??]

Cheers,