Bill of Sale/Idaho idaho Statutes This should be the information you should be looking at first. To reset the old odometers you can use a drill in reverse of forward depending on what is closest. I am not sure when they made this more difficult to do, somewhere in the seventies if I remember correctly. I would consider the law first and the fact if you reset it to zero you have to permantely tag the door post for all to see. .....g