hi i have a 2011 g37 sedan & when i知 driving sometimes once i hit 40mph it sounds like a helicopter blade & like when i知 slowing down the sound is still there till i知 at like 10mph

102k miles
daily driven

anyone have any idea what this could be? If you need any other details just let me know, thanks!!!

 

A video (with good audio) might be helpful.

 

Ill try and get my phone out next time it happens, I致e missed it each time before bc of traffic & i don稚 wanna wreck LOL
ty

 

What did you find? I have same issue

 

you may have an issue with the engine belt

 

Or the belt tensioner.