I have the same issue and it has nothing to do with the Y cable. You should get the vehicle back to the dealer. I've had wiring harnesses replaced and I'm currently waiting on a new radio head unit. I had the issue from the day I picked it up early April. It's so new, trouble shooting is tough and parts were in short supply as they were being channeled to new X3's. Not a big deal for me as I have Sirius.
|