Alright folks, here is an update.
I have an MY23 M3 G80 with iDrive8. I replaced my NFC pad with 84105A1DC85 and I can confirm that it was plug and play to get wireless charging going. I simply removed the other unit, plugged in the new one and it immediately worked.
Where I ran in to issues was trying to see if the digital key works - it does not. I tried it a few times and it didn't seem to recognize that a digital key was present at all.
Taking a look at the unit I purchased (84105A1DC85) I noticed that the diagram on the top indicated wireless charging but not NFC.
The description at the link below shows that this unit is indeed JUST a wireless charger. It does not at all specify any NFC capability nor does the diagram on the top of the unit indicate any.
https://www.getbmwparts.com/oem-part...ad-84105a1dc85
The other part number discussed here (84-10-5-A3E-813) is the exact same price and includes BOTH wireless charging and NFC. This is noted in both the description at the link below as well as the diagram on the top of the unit.
https://www.getbmwparts.com/oem-part...ce-84105a3e813
The lesson learned here is that the person who specified the installation of 84105A1DC85 and stated everything is working correctly clearly did not test the digital key.
I should have taken a better look and purchased 84-10-5-A3E-813.
I'm likely going to order the correct part soon but honestly I don't really use the digital key and I'm happy that I have wireless charging.
TLDR: Buy 84-10-5-A3E-813 do not buy 84105A1DC85 (no NFC). It works fine on MY23 G80 with iDrive8 but I have not done the coding as I haven't see any instructions on how to do it for iDrive8. Works fine without the coding but you don't get the warning to remember your phone when you exit the car.
P.S. anybody want to buy a 84105A1DC85 unit at a discount?
