This may or may not be helpful ....

Yea, I had the same problem in my E46 M3. Sirius and the TV tuner share the same mounting location. With a bit of a think, and some good old Velcro I came up with the following solution :



In terms of the TV tuner, I purchased the complete retrofit TV kit from a Ebay Germany seller. I believe the kit is also available for the X5, but not 100% sure. It came with the Analog TV tuner, the official BMW wiring adapter and the rear bumper TV antenna. I installed the Tuner and wiring adapter no problem and all is good. I've not got around to the rear bumper antenna yet as that is a bit more involved.

Retrofit TV tuner kit part # for E46 : 65 50 143 549

Good Luck !