you gotta take it to the dealer and asked them for the code that is specific to that radio, they might charge you for it. Or you can take out your radio and get the serial code. Take your insurance/car with you to prove that its your radio, and they can give you the code. Some radios, without taking it out, you can enter a combination of keys and it will pop up with a general serial code... and the dealer with get a list of codes.Be careful cuz you only get a limited amount of tries.