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SW38 Lock50 HW04-B or C Allows Downgrade RFA Module Software OBD when its High
When you obtain a new RFA module that has a Higher firmware than the Current GWM or BCM Supports.
To avoid upgrading BCM before adding keys and Avoid upgrading BCM & GWM Software First its Safer to do this.
Simply Go to Special Functions and click on RFA Downgrade and then go back to the RFA in the Module List and now it will update Fine and can accept keys and after adding keys you can upgrade the GWM & BCM RFA to the Highest Softwares if you want or leave on the older levels.
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