Reprogramming Car Keys Transponders in car keys are believed to make vehicles safer and are harder for thieves to duplicate. The key could need to be reprogrammed in event that it is damaged or lost. You can program key fobs yourself however, you must be aware of the correct procedure. https://g28carkeysolutions45236.laowaiblog.com/28783988/what-the-10-most-worst-car-key-programmer-mistakes-of-all-time-could-have-been-prevented