I have a 94 Mustang w/ a 6 cylinder, auto. The speedometer on the car works but the odometer doesn't. Is this a common problem on this vehicle & if so do I have to replace the odometer or is there a sensor that could be replaced. Just wondering before I head off to the junkyard for a used odometer. Any help would be appreciated, thanks.

 

Common problem with these. Odometer gears turn to mush. They can be repaired here: Instrument Cluster Repair, Speedometer Repair, Odometer Repair

 

Late Model Restoration has a gear kit that you can buy and fix it yourself. They even have a video showing you how!