I've tried changing the batteries on the remote a couple times on both sets of my car remotes and it still didnt work. I was probably thinking it stopped working after i changed the car battery or changed the stock deck to an aftermarket deck? Could the settings be resetted? I dont think it is broken or anything i havent done anything to it but changed the batteries. Maybe it needs to be programmed? And if it does need to be programmed does anyone know how to program it? I found something online but it said it can only be programmed with the stock deck otherwise i would have to take it to the dealer?