The code is set by the user NOT Toyota. It 3 numbers --- could be the last 3 of the VIN or whatever. You have 10 shots at guessing it before the radio says HELP and you have to go to the dealer for a costly reset. I did same to old one I had taken out of my old 4Rnr --- installed it into my PU. I thought I knew the # but failed after the 10 attempts. here is a time limit for entering the # too. Dealer want's $80 to reset. I did find a six digit code to get it out of HELP but can figure keys to hit to let me even enter them.