Transponder keys are factory-made keys that come with a car, these keys communicate via radio transmission with circuitry within the vehicle. This radio transmission allows for a key to be programmed to only start a specific, individual car. Only the person who is in possession of a car’s transponder key will be able to start and drive it thus reducing the opportunity for car thieves to steal a car. Our mobile locksmiths can programme a new transponder key for your car while you wait.