go to a tire shop, in Ft Lauderdale D T Performance and wheels ,,, most of them sell a replacement sensor and they program it there,, i did mine there with all 3 cars and have sent 5 crossfire members there all are still working and all were installed months and or years before the covid that means they work. i don't know which one they use but was told there are only 2 different ones that work on the crossfire. yes the car has to be there to program. so find a store that do yours for around 2 to $400