I have a 2006 XJ8 and have a recurring problem with locking/unlocking the doors with the remote. Sometimes it works, sometimes it doesn't but it isn't a battery problem. Same problem with my previous car, a 2000 S-Type. I used to have the dealer fix it via re-programming but they charged about $200 each time. I asked Sports Car Parts in Calgary about this and they told me the dealer is the only one who can do this. Does anyone know if this is the case and if any other options are available? I don't mind paying for an occasional thing but this seems to a Jaguar "make-work project".

 

You can go to the 'how to' section on this x350 site and it tells you how to reprogram the fob. You will need both keys. Don't know if that will fix the problem, your fob may be failing. Do the other 2 buttons work OK? if so i'd say you need a new fob. Available on e bay.

Stu

 

Same problem here.
I changed battery several times, but it wasn't the battery.
As I own two fobs, I allways checked my backup fob, which worked well.
So I think my fob somehow fails sometimes.

 

Thanks, Stu - I will try that or alternately obtain a new one(s) from eBay. The trunk release button works even if the door lock/unlock does not The panic button only works if the locking/unlocking function works. I've had the battery tested a few times and it always comes up fine so perhaps it is the fob but to have it fail on each of two new vehicles and within a relatively short space of time is very poor, I would say.

 

Often times it is the little micro button that sits under the rubber pad that goes bad. You can tell when they are going bad because they wear and then don't have a defined crisp click to them. Easyest way is to buy a remote off Ebay and follow my remote reprogramming procedure that are posted under the 'how to' section on this x350 site that PSG is pointing out. I see a person on Ebay sells just the micro buttons but you would have to be handy at desoldering the old micro button and soldering in the new one, they are very small.

Here is the ebay posting: 3X New Switch Click Button Repair Remote Key Fob Jaguar s Type XJ8 XJR XJ XK S | eBay

LCM JAGUAR
2008 XJ8 VDP
1988 XJ40

 

There was a recall on the 2005 FOB's...don't know if it continued to 2006 or not. They were using a foam pad internally that shorted and destroyed the electronics. Happened to one of my 2 FOB's. jag USA were pretty rude. It seems they discontinued the recall before I found out about it, even though they never attempted to contact me.

 

There was a Key Fob Technical Service Bulletin issued Oct. 13, 2006 # S527 Revision 3
Check for the Key Fob part number '1X43 15K601 AJ' located on the inside of the key fobs when you pull the upper and lower portions apart. If the part number is an “AJ” meaning 1X43 15K601 AJ, no further action is necessary. If the part number is NOT 1X43 15K601 AJ (meaning AB through AG), perform the "Install Insulating Foam Pad" section below on affected fobs per the bulletin. Jaguar noticed that Key fobs AB through AG would build up static electricity inside and thus my not always open the car door. To eliminate this issue, Jaguar did a recall and put an anti-static foam pad inside the key fob. The “AJ” series of key fob was upgraded by Jaguar to avoid this problem so it does not need the foam pad.

LCMJAGUAR
2008 XJ8 VDP
1988 XJ40

 

I just bought a fob on ebay and the last two letters are "CB"
I haven't had a chance to try to program it yet....is "CB" valid for a 2004 XJ8?

 

I'll add my vote that the FOB is simply worn out. As someone mentioned, you can tell because the buttons don't give a crisp response. Snag a new one off eBay, they're relatively cheap and very easy to program.

 

According to this universal listing of car remotes a
Jaguar 1X43-15K601-CB is for 2002-2004 model year XJ6, XJR and S-Type

Remote Cross Reference

LCMJAGUAR
2008 XJ8 VDP
1988 XJ40

 

If you only need the button part look at this.

Jaguar Switchblade Remote Key Keyless Entry Fob Transmitter Bottom Half | eBay

 

Good link Tom.

I bought a couple of those from the same seller, and although the auction states the FOBs as "used," they look and operate as new. No wear on the icons and crisp response from the buttons.

 

I have had this problem in the past
Once was an early indication the battery (car not keyfob) needed replacing
The other was fixed by a re flash of the REM using SDD/Mongoose

Cheers
34by151