Hello I recently bought my g35 a few weeks ago it’s a 05 wit 118k miles since I got it it has been making this noise idk what it is it only does this once I get past 20 mph it’s a buzzing type noise that gets higher in pitch once I go faster. It sounds higher then the actual engine rpms but gets louder.

 

You're going to need to make a video of the sound and post it.

Put it on youtube then put the link here and it will automatically embed.