Transponder keys are those that are placed into your vehicle while the ignition is turned off, and the vehicle's security system detects it without sounding the alarm. Transponder keys are often equipped with a chip embedded into the head of the key. If you have to spend a lot of money on your automobile key, you should get a transponder key. You may also detect it by utilizing the hit and trial method, which involves starting your automobile engine with a non-responder car key and seeing if it starts. If your automobile does not even have a responder key, another key will not start the engine until it has been reprogrammed to work with the car. If you find out that your car has an emergency response system, the safety system will perceive this one as a theft attempt; you should be cautious when carrying out this method.