I too had a broken odometer for a couple years.  I finally fixed it thanks to the List.  Took two tries, but works now.

Lost a couple years of odometer reading and don't know what it should be now.

Then, the Oxygen Sensor light came on.  I replaced the sensor, but the light stayed on.  I have learned that it has a re-set button on the speedometer cable, and it lights up at 50,000 or perhaps 60,000 miles.

Does anyone know the exact light up mileage?

I can then calculate my lost miles by subtracting the odometer from the 50,000 or 60,000 oxy miles.

Will this work?

Ed in Rockville, Md