hi, guys. i fitted a replacement dashpod (2004 focus tdci ) a few days ago,

due to speedo/rev counter going wild !

most times not working at all. is this a common fault ? i need to get mileage reset from 134,600 back to my original of 113,200

this is for my insurance & service history, anyone in tyneside area do it at a good price? thanks guys. steve.