whistling sound on 2008 Nissan Altima

When driving at speed of 40 plus on the drivers side I hear a whistling sound. sound not audible when window is closed

Asked by for the 2008 Nissan Altima
Wind noises are difficult to identify and fix, but not impossible. You want to look at all the seals, weatherstripping and alignment of the mirror, doors and trim in the area of the noise. Compare with the other side of the vehicle and see if everything is aligned properly.
One trick is to take electrical tape (this type of tape is removed easily) and cover all the gaps between the doors, mirrors and fenders and see if the noise goes away.
Good Luck
Thanks for your prompt reply