My key fob (XJ6 2006) has stopped working, a new battery had not fixed it. If I purchase a new fob online and have it cut by a locksmith can I program the remote myself or do I need to have the locksmith do it? Also, any recommendations on which online supplier to use?

 

Which part of it does not work?

The key fob has two functions:
1) remote, this is affected by the battery
2) transmitter that works along with the metal blade to start the car, I am not convinced this one needs a battery

If only the later does not work, you can buy just this part (make sure to get the proper frequency: 315 MHz for US, 433 MHz for most of the other markets), and keep the part with the original blade+transmitter.

 

My car is of US spec, and I only needed to replace the "remote" part (1 of the 4 buttons did not work)
this is what I bought: https://www.ebay.com/itm/163502766321
...and programmed it myself following TTG guide:

 

You may find the attached useful.

 

Thank you very much Jaroslav and Ctsemicon for you replies and the video. I am now quite confused and unsure where to go now. In the video the guy mentions that the one he bought on line had the incorrect transponder. All the 4 buttons on my remote do not work any more, I have tried two new batteries with no luck. The mechanical key opens the door and starts the engine OK.

 

IMO, in your case you don't need to care about the transponder, yours is OK, otherwise you wouldn't be able to start the car. (Here's me asking about the transponder couple months ago. Note that I was mistaken thinking some of the key-fobs don't have the transponder.)

In your situation I'd do exactly what I have: buy this thing, open your key-fob, toss away the half with remote/buttons from yours and stick in this new one. (I.e. put together your half with the blade/transponder and the new half with the remote/buttons.)
Then you just need to introduce the new remote to the car, as demonstrated by the guy from TTG.

 

Just to be sure, can it be confirmed that my frequency for the remote should be 433.92 MHZ. My X350 is an Australian import.

 

I suspect the 433 MHz was exclusive for Europe. (I see in my earlier post I implied USA/315 was the special one, my bad. It seems more likely Europe/433 is the one weird market.)
I am like 75% certain the actual frequency of your car is shown somewhere in the SDD.
Also the frequency is very likely identical to the one your car's TPMS uses. Thus guys in a tire-shop should be able to verify this for you.
I realize none of these are super-solid answers.

 

Look inside the Key Fob Doc I attached in previous post. It lists which variants are 315 mhz and which are 433 mhz. Just pop open the original Fob, and you will see on the first line of printing (on the button half) something like "1X43-15K01-AE" . The key (pun intended) is the last two characters. All the "A?" variants are 315. Note he statement Key Fobs transmit on 315.0MHZ for US market except BD series which are on 433.92MHZ for Europe market – Therefore, for the imported Jaguar cars only 315.0MHZ remotes will work on your car:

 

Thank you very much for that info ctsemicon The number on my fob is 1X43-15K801-BG so that means mine is a 433.92MHG. I can now go ahead and order on on line and program as per the video that Jaroslav posted.

 

I am becoming very frustrated. I ordered some new key fob parts on line, a PC board (433 MHZ) and the cover with the buttons on, my car is Australian so I am assuming it is European frequency. However I received the complete key. I went through the pairing process i.e.



Open driver’s door

Pull headlamp flash and hold

Insert key and turn to first position (accessories)

Release flasher stork immediately

Flash headlamp 5 times, at this point the red LED flashed and beeped.

Push any button on the fob 5 times.



The key fob still does not work, I went through the process several times with no success. I have put a new battery in the fob.

Because I didn’t receive exactly what I ordered I thought that just maybe it was the wrong frequency (315 MHZ)



So I went back to the internet and ordered just a 433 MHZ PC board which was duly delivered. Still no success. Could it be that there is an issue with the car, rather than the key fob ?

 

You have to flash really quickly