My 2016 i8 has this issue - When I start it up, the SOS malfunction message is displayed on the dash with literally no sound in the vehicle, no music, no chime, nothing! I found this video on YouTube - - that suggests this is a common problem with BMWs.
I've ordered the part suggested in the video but can't find the satellite radio anywhere in the vehicle.
Anyone know if the fix is different with i8s or where the satellite radio can be found?
PS: I found the amplifier on the right side of the trunk but there doesn't seem to be a satellite radio close by, at least from my observation.