Exactly same problem here with my Aug'08 X5 with 4000 miles. Went to dealer (Chicagoland area) and told me that they didn't find anything (what....????) wrong with brakes. Told me that it might be snow/salt issues but not satisfied with their answer. I don't know what they did, but after the visit, I haven't heard the noise for two weeks and then started again...

My 10 year Honda and 4 year Lexus brakes never made any noise in any weather conditions, why is this so called "HIGH END" luxary cannot handle?