When i got my 3rd jazz it had the wrong radio card with it so when i disconnected the battery i locked the radio out, I was using the car so could not get to a dealer so i phoned Honda uk who said go to your dealer for the code, I took a photo of the car with the radio displaying the serial number and sent it to my other half's phone, she went in during the day with said photo, my DL and reg document together with her docs (same address) and they gave her the code free of charge, if you do the serial number donkey work they dont charge