Will VXDIAG Subaru SSM4 Program a 2021 Outback XT Key?

Q: I am trying to program a 2021 Subaru Outback XT key and from what I understand only ssm4 can do it as I tried with im608 and obdstar x300 and neither are able to do it. I was wondering if anyone is able to program key to this model using vxdiag subaru ssm4?


A: Yes, you are able to program key to 2021 Outback with our Subaru SSM4 scanner.

An 8-digit “Authentication Key” supplied by SBR will be a required input when working with SSM4.  Unlike the previous system where Teaching Codes have been unchanged, the new Authentication Key will change approximately every 6 months.   The new vehicles utilize an Immobilizer Type “G” or “H” system depending on model:

  • G:  Vehicles with a turn key ignition switch
  • H:  Keyless Access with Push-Button Start.


2021 needs a certified locksmith login. For 2020MY+ Legacy and Outback with a G or H -Type system, the Server Connection screen shown below will be displayed. Input the current Authentication Key and select “Connection”.

As of June 30th, 2022, the Authentication Key has been revised to XFT7DWTH.

Subaru Outback Key

The procedure can be found here

Program Subaru Legacy/Outback 2020-2021 Smart Key with SSM4