Finally replaced my RDC module
Found one on ebay with the same exact part number
Same sw version
It was actually made the day after my original one
Plugged it on today, and it worked fine
No need for reprogramming or anything
So I guess take your faulty rdc module out
Get the exact part number and make sure the sw version matches
And you should be good to go
Cost me $60
Instead of $900 at BMW of sterling , VA