I have my V1 hardwired into a 2007 BMW 530xi (which I got 2 weeks ago) that has Sirrus and Navigation. The V1 is attached to the windshield on the drivers side just below the tint line and next to the rear view mirror.
As soon as it power cycles on, the bogy counter goes to 1, the behind arrow is lit, and the KA indicator throws anywhere for 1-3 LED's. I don't have this problem in any of my other cars, so I know the V1 is fine.
I am running software version 1.8 and have not changed any of the factory settings. Could the satellite radio antenna or DVD laser be messing up the V1? Anyone else run into this and have a solution? Great forum, I can't believe I have never come across it before!