Anyone know how many digits in radio code? I bought the car brand new with all manuals and documents 5 years ago from an Audi dealer. I didn't know Audi radio requires a radio code because my sales never mention it. I am going to replace my battery tomorrow so I may need a radio code. I looked into the radio manual, the card suppose has radio code on it was empty.

I remembered someone mentioned a sticker in the trunk. I had the sticker with a 7 digit numbers (between 1 - 6). Could it be my radio code?

 

I have a 2003, the code is 4 digits, and the card is located in the Sound system booklet that was with all the other documents in the packet.

 

I got the code from dealer today. Since I purchased my car brand new at that dealer, so it was their fault not giving me the radio code.

Thanks for all your help.

 

Oh, BTW, the code is totally different than the number on the sticker found in the trunk. So if you don't have radio code, don't even bother to look the trunk sticker.