I've got a 2005 GTI, with a retro fitted RNS510 with a 9w7 Bluetooth module and it's suddenly started to struggle with music streaming/accessing the phonebook (calls still work fine). I recently upgraded my phone to the iPhone 7 Plus from a iPhone 6 Plus and thought that the 7 Plus may have been the problem however I've just tried my 6 Plus again and I'm still not able to get it to stream music.
I then thought that it might be the latest software from Apple 10.2.1 which both my 6 Plus and 7 Plus are running but I've managed to try a 6 Plus with 10.0.2 and it's still not wanting to stream music.
There seems to be reports of a lot of other manufacturers Bluetooth systems not playing well with the iPhone 7 / 7 Plus but few reports of VW systems playing up from what I can see.
From the testing I've done it seems that it's not phone/software related however I'm wondering if anyone else is having issues with the Bluetooth in their cars? specifically after upgrading to a new software version on their iPhone or to one of the latest iPhones?
Any help would be appreciated