Here is the instruction on 2012 Ford Focus mileage correction by using OBDSTAR X300 DP tablet key programmer in 2 minutes.
How we correct mileage for Ford Focus 2012 using OBDSTAR X300 DP?
First, connect X300 DP tablet with Ford Focus via diagnostic OBD2 port. We find Ford Focus 2012 OBD port location just behind the little pull down compartment on the right side of the driver’s leg.
Next, power on X300 DP tablet and turn on car ignition.
Choose “Odometer adjustment” function and go to “Ford”.
Select “Focus” from the car list.
Select vehicle year “2009-” option
Then, OBDSTAR Key Master DP read out the old odometer value 69543KM exactly! Same as dashboard odometer!
Input the new odometer value 48888.
OBDSTAR X300 DP successfully change Ford Focus mileage from 69543KM to 48888KM!