Using a Key Programmer Modern key fobs are more than just keys; they communicate with vehicles to start it and open the rear hatch, and more. To do so, they need to be programmed to work with each other. All automotive dealerships, auto manufacturers, and auto locksmiths offer key programming. https://car-locksmiths13564.bloggazza.com/28800710/how-do-you-explain-car-key-programmer-to-a-five-year-old