You shouldnt have gotten one off ebay. Because chances are its not gunna work. You need to go to a dealer and they will give you the right key fobs and will program them for you. If you dont have the right key fobs for that car then they wont work. also to see if your car has RKE (remote keyless entry) turn the ignition off. hold down the unlock button on the door, and turn the key on,off,on,off..if you have RKE then the doors will lock and unlock, after a max of like 10 seconds. Usually shorter though.