I have a whistling noise from my driver side window when I go over 40 mph. I have tried rolling it up and down but it still always makes noise. I tested the seal in the top area of my window and it was sealed. I have heard that Subaru outbacks are known for needing the outside mirrors adjusted. I believe it is that but I wanted to know if you had any other ideas.
It*s impossible to solve the riddle of your noise without seeing the car.
But, when you said you tried rolling the window up and down, did you mean you hear the whistling noise while the window is up and you hear the noise when the window is also down?
If you still hear it when the window is down, could be there is an air leak in the door frame or windshield somewhere.
If you hear it only when the window is up, then I*m guessing that there is still a air leak somewhere in the window or door frame. You could try spraying water all around the window to find the leak or slowly move a smoke pencil, or incense stick around window and door frames with a fan blowing the smoke towards the car.
〉 Answered on Nov 24th, 2008 by Amy Mattinat, Owner and Author at Auto Craftsmen Ltd
Yes, the outbacks have a concern with loose molding around the drivers side mirror causing a whistle noise at high speed. Also, a loose windshield molding in the top drivers corner can cause that same sound effect.