I’ve literally spent hours and hours searching. Picked up a new mustang a week ago. 80 miles on it. 200 miles later from 60-80 miles an hour I have a horrible rattle which sounds like wind sheer but only on one side by tje passenger mirror. I’ve chased removing the passenger rear interior...
I just bought a brand new 2017With 80 miles on it. I have since put about another 300 on it and every now and then to at speeds above 60 I get what sounds like a windshear or something rattling for the right mirror area. I checked the tightness on the window but it appears to hug the molding...