I also had the low mic volume problem when I installed my b/t module in my 01' X5. I got the new mic and moved it to the sunroof switch location.

The switch opening is slightly larger that the mic openinig, so I had to put a shim on the mic to get it to not rattle. The sunroof switch was a tight fit in the mic opening. It helped a little, but I still get people telling me that I sound "far away". I tried to get Advance Autovations to help solve the problem, but as you have probalby read, they are no help at all. If anyone else has any suggestions, I am all ears.

Dennis