just taken my dads sat nav out to clean the disk lens as its not reading the disk anymore,knew i didnt have the code for radio but had little choice.so im after the code to see if following the repair guide worked or not,or its for the dustbin im affraid the unit is an alpine the numbers on the back are = p/n 08A40-1D6-100 ref no : BB792P0 serial # ckb22000381a this is just the bar code scanner i thnk,but i didnt know which numbers where needed? hope some one can help oh its a honda civic '03 exec