Originally Posted by
az3579
A common mistake people make is when they replace their light control modules, they tend to just buy used ones and put them in, calling it a day. They need to be coded to match the cluster, otherwise the tamper dot gets thrown. Brand new LCMs just match the cluster, so they don't throw tamper dots. Most likely a used LCM was put in, or the cluster replaced with a used one.
Either way, you would have to hook up PA Soft to the car to see what the mileage and VIN is on both the LCM and cluster. This would tell you which of those two modules is the original one, therefore telling you the (most likely) correct mileage.
Personally, I'd walk away from this car. It has too spotty of a history already, and the SES light doesn't give me the warm and fuzzies. It's probably just the occupancy sensor as they do tend to fail on some cars, but it still seems like too much headache just to make sure the car is actually legit.