Originally Posted by parallelcircuits
My key fob doesn't work any more. I have replaced the battery but it didn't help. Just the Panic button works but no others.
As long as at least one button is recognized by the car, then yes, the other buttons on the key fob are probably dead (i.e. the problem'* in the key fob, not the car). But can you carefully take it apart for a look-see? I had to do this on a few of them over the years. The usual problem is that either the flexible button cover gets a little out of position over the contacts, or the contacts themselves just get dirty.
If you've seen the price of replacement transmitters you know you have nothing to lose by trying to clean yours instead. I'd try a little rubbing alcohol on the little carbon-button/circuit-board contacts, or a clean pencil eraser on any brass or copper, metal contacts.