I have a friend whos cars Bluetooth isn’t working, it stopped working last week and won’t connect to the phone. She has tried disconnecting the Bluetooth box under the drivers seat. I’ve tried connecting to the 77 telephone module and it’s saying no response from controller. The 77 module was on the ‘installed’ tab. Is it needing a bluetooth box? If we got same part number would it be a straight swap? Or would it need coding?

It’s a 2011 Tiguan