Kinda stumped on that on. Just a word of advise though, if you start your car to let it warm up, don't shut the door all the way or have a spare key with you. My bros friend did that on time and his oem alarm malfunction and locked him out of his car. He only ran into the store for a minute. He had to end up calling a locksmith to get him back in.
I'll do some research and see what I can find. I'm thinking something in the brainbox though, so you might want to go ahead and price that at the dealer.
