2019 CX-9 Whining noise from engine bay when > 40km/h

[leejan1988]

My CX-9 engine bay generates high frequency whining noise when the speed is over 40km/h. The noise is louder and louder while the speed is faster. The problem is only related to the speed no matter acceleration, deceleration or steady speed.

The problem is similar to this TSB related to transmission. But the TSB is not applied to CX-9.

https://static.nhtsa.gov/odi/tsbs/2019/MC-10155437-0001.pdf

Does anyone experience the similar noise as me? I recorded and uploaded a video. Please share your experience if you have similar issue.

mazda cx-9 whining noise video

 

[MazdaViking]

Hi Leejan, I had a listen to your YouTube video. If it has nothing to do with the RPM, only with the speed of the car, my guess is that it has to do -maybe- with the wheel bearings.

 

[roundle1979]

Maybe a wheel bearing?

 

[racermp]

sounds like drive line issue. need to put it up on a lift and run the car to identify where it's coming from.