how can i fix my radio security code kia pregio 2004 van?

I fixed my radio code by adding 1000 to the last four digits of the serial number eg if last four numbers are 4185 the code will be 5185

Geoff
October 2010

note the last four numbers of the serial number of the thing and add one to the first number...
Say last four numbers are 4567
your code will be five thousand etc
Had to do it myself...the whole execise is interesting
Amazing security for a hunk of CR#P

Chuck
March 2009