Programming Car Key Cut And Programed Keys As automobiles have become more electronic and more electronic, key programming has been an essential service that could generate a significant amount of revenue. But many shops don't offer this service. Modern fobs and keys are more than just keys. They can remotely start your reprogramming car key, open the rear hatch, and safeguard the vehicle against physical and virtual attacks. This is why you must be in a position to program them. What is a transponder? A transponder car key is a key that comes with a security feature to prevent theft integrated into it. This is done by integrating the radio frequency identification microchip inside the head section of the key. The chip is used for relaying a signal your vehicle's immobilizer in the ignition start-up process. This chip stops hot-wiring process and makes it extremely difficult to take a vehicle.