2001 will support - VIN reporting
from research it seems if you buy a re-manufactured computer ,Vin needs to be set so as to run proper.
If you buy one from a salvage yard it will have that cars Vin yet your car will still run proper . Now if you have a sweet car
like $30,000 & newish, future selling will be an issue for car fax and they will check . But for a 15 year old bondo truck that
I will be last owner repairs of all sorts can be understood. People do replace computers. doors , motors .



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As to mileage sure the device keeps track ,but some states keep track at inspection time, that info must be some place .
PA's info , it's in a book at station not sure if it ever goes any place .