We recently had the clutch replaced in our 1993 Saturn SC2. Noticed that the odometer was not working. Took it back to repair shop and they said that they would not have done anything to cause it to quit. What could it be and where would we look. :
A little research about your odometer turned this up.
"A little red gear operates both the odometer and trip odometer. This gear is apparently vulnerable to interior heat in warmer climes, and the teeth break off with depressing regularity, rendering both odometers inop. This is a well-known vulnerability in our Saturns. Its about 1/4 inch in diameter, and fairly expensive (around $29.00, depending on where you order it).
Replacing this gear is not "simple" by any means. But it can be done by somebody fairly adept with hand tools, and should fix the problem permanently."