Its possible to change mileage even if its electronic. Its pretty common among the sale agents here, i was interested in buying a suzuki sx4, mileage on the car showed 63,000km when i checked with the dealer, in their records it had done in excess of 150,000km. If the car has been serviced regularly at dealer you can get the mileage, if it has notbeen serviced at dealer then again, u can't know.

I am not aware how the records are maintained for car inspection for istemara and how can it be checked.