I just bought my car used and the key didnt work to open the door when you press the button. So im thinking great, a new key is like 150 bucks. So went to the dealer and before you order a new key try this. Stick the key in the ignition, switch it to the on position but dont turn on the car. Wait like 3 seconds turn key to the off position, pull the key out, hold the door open button down and press the door lock buttoon three times and that will reprogram the key to your car. The dealer did it right in front of me and it worked! so if your key doesnt work give that a try!