How to solve OBDSTAR X300 PRO3 serial number not exist error

OBDSTAR X300 PRO3,some may call OBDSTAR Key Master,is professional key programming tool,and it can also do odometer adjustment, EEPROM/PIC and OBDII function.etc

key master

OBDSTAR X300 PRO3 support update online,you need remove the TF card from your device.Insert your TF card into computer.Format your TF card and ensure it is empty.Login OBDSTAR official website,and click One Key upgrade.Open the One Key upgrade. Input your username and password. Then select End User and click Log in.

But now we received feedback that can not register on official website,it shows “The Product Serial number does not exist”

x300 pro3




It is that the register password is not right,please start your OBDSTAR Key Master,then click “About”,you will find the password.