Here is do mileage correction on Skoda Yeti 2012 with nec&24c64 via Carprog v8.21 Firmware Perfect Online Version with All 21 Adapter step by step.
First Connect carprog with adapter and connect to Skoda.
Then open Carprog V8.21 software
Select DASHBOARD-> SKODA-> SKODA 2009-> DIAG V0.2
Select change KM
It will connect CAN
Reading mileage, just wait
Carprog read the Old KM value: 58112km
Then Input new value you needed and choose change KM to miles,such as:36105
Done! Carprog v8.21 change km SUCCESS!
BTW ,Carprog clone is a good airbag reset tool as well,Read this article to learn it just takes 1 minute to reset and repair airbag computer in your office, with the new CarProg (v8.21 or v9.31) airbag reset tool：