I have a 09 G37, and I have been tring to find out this noise.
Been to service center couple of times but the sounds have net been removed. (funny thing is I always found some other noises =_=)
Anyway I have link of an video.
does anyone know what this noise is?
After I let go of my accelerator this noise comes the bottom of the car.
I can't express the noise with words but I can say it is kind of an raddel sound or something like that.
This noise is really killing me. Plz help me out with this noise,.

Thanks

 

I can't discern much from that other than that your blinker seems to work ok.

But based on what you said, I would say heat shield.

 

You really need to tell us when in the video to pay attention. I hear nothing unusual other than wind noise...