I'm also wondering if the DAB module might be a bit old school now as it doesn't support DAB+ which might explain why I got no signal outside the UK in Europe. I might look into options for DAB+ and whether the aerial can be reused for that. There are some nice looking android head units that replace the screen with a touch screen and sit over the top of CCC so you can switch between systems.

While the vin is stored in many modules, changing it is not required for it to function. An example being the i-drive controller has your vin stored in it. I don't know much about UK DAB but US HD Radio modules can be swapped without coding.

Interesting thanks. Does that include newer versions of the modules? As in can a newer module be put in place of an older module or does there need to be software updates to allow for newer modules?

Incompatible is possible but not probable. BMWs solution to this is to update the software to all modules so they are known compatible. As this is a MOST module, updates require an ICOM interface which makes it more costly and complex. With that said, this is low risk to purchase used and give it a try.

I think you’re right it would be a low risk and probably would work. I might look into other options first as the modules are DAB rather than DAB+ so are a bit old school now. Maybe time for a full android screen upgrade.

I joined and paid the subscription fee just to thank you for this suggestion. After months of getting the SOS error, I tried to fix it by using the Fiber loop connector to troubleshoot and tearing apart the car and dash to figure this out. It did not cross my mind that this was the issue. I was even going to pay someone $365 USD to code out the SOS error. This solution worked for me but this is how I came to the conclusion of doing this ... The key is to make sure that any paired devices are out of range OR the bluetooth is turned off on any paired phone(s) before attempting to delete the paired device from the BMW BT list. If not, BT will never engage and it gets stuck in search mode while also getting the SOS error and also disabling the AUX audio input.

My assumption of what is going on is that the BMW BT module has an issue trying to negotiate BT protocol with multiple newer phones, like a pari of Iphone 12s in my case. It could be that a software update cures this but I am not sure. In my case, the SOS error shows up again if I try to add a 2nd Iphone 12 to the system. If both phones are in the area when trying to negotiate a BT connection, it gets stuck in a software loop until an SOS error pops up.

My solution, until i understand how to code out the SOS error, was to delete the BT pairing from the BMW BT and to forget the BT connection from my iphone. Recycle the car and start the pairing process again.

If someone else can add to this on why a 2nd iphone 12 cannot be added to the system, please let me know.