I have about 105k on my 2013 G37x coupe. About 2 weeks ago, I heard a squeaking noise while driving. It sounds as though it's coming from the left side, I believe left front. It seems to start after about 10-15 mins on the highway. When I depress the brakes, it subsides intermittently, and sometimes when turning the steering wheel I can get it to stop intermittently.

Things I have done so far.

Replaced front pads and hardware. Sound was there before and after.

Replaced left from wheel bearing. Sound was there before and after.

checked the brake dust shield for contact on the rotor. I ensured there weren't any shiny spots, and even removed a part that may have been contacting. Sound still there.

running out of ideas.

I have a video of the sound..



Any ideas?

 

Have you checked the drive belt pulley's?

 

Agreed. Sounds like a belt, pulley or bearing. Easiest would probably be to remove the belt and spin each pulley by hand.

 

Did you ever figure this out? Mine is doing the same.