my car is up for sale again, with half the mileage

[Cloudsurfer]

Originally Posted by Brucelee

Boy, it is no longer "easy" to wind back on odometer. But, you can replace them, although you have to know what you are doing.

I wonder if CFax is going to catch this. It should.

It's shocking at how easy it is to do on a 9X6 car (I don't know about 9X7). All you need to do is grab an appropriate cluster (basically either "old" style or "new" style) with lower miles, swap it into the car, and if it was coded correctly, you're done. If not, just get a friend with a PST to re-code it and that's it.

BMW stores the mileage in two places (the cluster and what's called the "Light Control Module") and those two values must match within 60 miles, otherwise it throws the "tamper dot" on the mileage display. Porsche only stores it in the cluster (this may have changed with the 9X7 but I don't know).

If Carfax doesn't catch it, the state should.