How to Program a Car Transponder Key?

[Brooklyn]

To program a car transponder key, follow these steps: First, purchase a blank key from an authorized 4S dealership. Then, have the key cut to match your vehicle's ignition cylinder. Finally, take both the newly cut key and the original key code (provided with your vehicle) back to the 4S dealership for programming. When the key is inserted into the ignition, the car's engine control unit (ECU) sends an encrypted electronic signal to the transponder chip inside the key. The vehicle will only start if the ECU receives the correct security code response from the key. Even a basic key without any buttons contains an internal chip that communicates with the vehicle's anti-theft system. Programming transponder keys requires specialized OEM equipment available only at authorized service centers.