As we were known that X300m is a special tool for mileage correction.
It can be used on various of car models.
Here is the step to tell how to use X300m to change mileage for Mazda M6.
First of all, connect the device with car via OBD port.
Start the car models, the original mileage will appeared.
Enter the Menu and Select Vehicle
Select Other Vehicle
Iginitiation Complete for downloading more models
Select Mazda M6
Switch Ignition On
Input New File
Input New Value you want
Data Backup Succefully
Start Mileage Adjustment
Input New Mileage Data 257898
Mileage Adjustment Completed
Mileage Adjustment New Display
New Mileage 257898