OK, the new mic is in and the position has been switched with the sunroof switch. I can confirm that the 2005 sunroof switch is slightly longer, by 1 mm. All I did was place some doubleface tape under the retaining clip for the mic and that snugged it up. The new mic sounds much better. I have the old mic in my 530 but I gues the larger cabin size of the X5 allows for more backround noise.

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2011 550xi Carbon Black/Oyster, M-Sport, Premium Package, Technology Package, Electronic Damper Control, Dynamic Drive, Comfort Access, Active Seats, Surround Cameras

2013 X5 5.0 Space Grey/Black, M-Sport, Premium Package, Technology Package, Comfort Access, Surround Cameras