Hey all, I have a whining sound that seems like it's coming from the center dash area. I first noticed it a couple years ago in my 2001 z3. I now hear it in my 2000 740. In both cars it doesn't happen until about 70 mph and becomes louder as the speed increases, however, it doesn't always do it. Now that I hear it in two very different cars, it obviously has to be a shared component. It sounds almost like the dentists air tools except a slightly lower pitch. Does anyone have the same problem or know the fix.

James LeCompte