Reprogramming Car Keys Transponders in car keys are believed to make vehicles more secure and less likely to be duplicated by thieves. Keys may need to be reprogrammed in the case of damage or lost. You can reprogram key fobs yourself however, you must be aware of the proper procedure. https://g28-car-key-solutions16002.post-blogs.com/50898665/the-10-most-dismal-car-key-programmer-errors-of-all-time-could-have-been-prevented