For about a week or so I have a loud high pitched whistling sound coming out of the hatchback area (Porsche 968). I have determined that it's coming from the driver's side area, where I put the yellow circle on this stock photo.



The sound starts when I'm going about 40 MPH and gets louder as I go faster, it's really loud and annoying when I'm doing 70 or 80.

Does anyone have an idea what is wrong here, and what to do to fix it? Thank you in advance.

 

the glass is likely starting to separate at that corner.
so a little gap is opening which whistles as air goes over it.

 

thanks for your reply. what needs to be done?

 

you might be able to find a glass-repair shop who can fully re-seal the frame to the glass.
but if yours is just starting to separate now...you could just put a piece of tape over it