30 May 2007 MASHHAD -- Iranian technicians have managed to produce the Piezo electronic speedometer sensor. Akbar Amini, the manager heading the research team, said the sensor will be used to estimate ...

I have a Dodge that I suspect the VSS is going bad on. The speedometer jumps around sometimes, and is frequently off by 10mph or more. I called Dodge and they suggested replacing the VSS as a start.