i dont know weather anybody else has encountered this but i got in a wagon the otherday and the kms were showing 67.7 only, a quick look at the dash odometer and it was showing 1000067 so presumably the didgi tacho has rolled over back to zero . as far as i know the didgi head has not been replaced etc . i would also presume that there would be an internal counter that would show the correct kms. also the print out showed the correct kms