Hi, greetings Good Day to you I just have problem with my car is a Honda Accord 2004. My battery dies and have to change, but i cant find the code card. I need any one coud help me to call the USA deaer with use toll free at 1-800-577-4853. Just ask for the service department and they will be able to help you find your serial number. It helps if you have the VIN number(1HGCM66555A800013) RADIO CD HONDA ACCORD 2004 EX AMERICA NO MODEL 3175-SDA-A120-M2 REF CQ-EH146Z SERIAL 12101291 LABEL M4G478020 thx for your help!