Bought 4 of these for a 2005 Lincoln. Either all 4 were dead or they need to be programmed. I also have the TPMS tool and they don't respond no matter what. be programmed with your special tool. Buy a vdo ready sensor for a few euros more and it works immediately without tools. the car recognized her immediately. hp You can test each sensor while it's still in the box, even without installing it in the tire.