I this probably is a stupid question and I understand that but I'm looking for out the box thinkers here. I know intended use isn't for this application but want to know if there is a possibility of it working?

I just got my new to me 99XJ and it only came with two regular keys. Well on my build sheet it says I have keyless entry so I popped by the dealership and they confirmed it. But I have to buy a new key fob for $95 and then have them program (another $60). So it's gonna cost me $155 to get back to factory keyless. My question is has anyone or is it possible to use a newer style fob like the one below with the fob and key all in one? What would prohibit it?

 

I personally don't know but I would like to find out also because my 89 came with keyless entry but my parents lost the remotes

 

Different rf signals, different key design, etc.
Do yourself a favor and just get an aftermarket alarm with remote start. Best thing I have ever done.

 

Gonna have to stick with the stock style key fob or install a replacement system like mentioned above.

When I had took mine in to a dealer to have it programmed, the guy said "sorry it didn't work" really loud after spending just a few seconds programming it. I wasn't sure what happened, but apparently he thought $60 was unreasonable as well.

You should be able to find a new key fob from a non-dealer parts seller for around $30.

Instructions to program another key fob are available. They are probably available at other places, but this is the first address that came up for me with the info.
http://www.jeepforum.com/forum/f11/p...ss-fob-501055/

 

just get a replacement keyless entry system

 

You were able to program remotes up to 1996, as they used the old IR system, but with the newer RF systems, you have to have a dealer or locksmith program the remote with a computer. As far as I know, there's no workaround for this, not even using the factory OBD port or a key sequence (you can, however, program new Sentry-Key keys with a key sequence). If there was, I'd want to know about it, as I need a second remote for my 2002 WJ Grand Cherokee.

The remote you show is for 2005-2007 Grand Cherokee WK's, so you'll actually need a remote that looks just like this one (black or gray in color) to work with your XJ: