[derSpeed]

HBWT, I tired everything, including the window solution you tried. Have you ever had to do that to any other brand of car you have owned? I haven't, and I have owned every German and Swedish brand available in the US. As I stated in my first post, the Teflon lube worked for a few days on the door seals. When they were replaced, the noise all but stopped. I still hear a few slight squeaks, but I have not determined the source. Still seems to be coming from the seals. I considered applying Plasti-dip to the mole skin, or applying chip guard decals from X-pel to the door jambs. I think that would have reduced the resonance.

When I first got the car, I lubed every piece of plastic and rubber in the doors, including the insides of the weather strip (accessed through the little holes). Those areas are still pretty quiet.

I really like my X1, but I will probably avoid BMWs in the future. The issue is just unacceptable. It really turned me off.