Question: Can Xhorse vvdi2 read and write cas3 and 4 obd to change mileage?
part of CAS4 can do
cas3 usually use file to change mileage
To correct mileage on BMW, you need to correct both on CAS box and Dashboard.
Question: I can write cas4 obd and remove dash to do the rest?
Answer: yes.. most cas4 ok