No, this is coming from under the engine cover.

John

Mine does it too, but doesn't bother me in the least. But the rattle from the rear hatch is driving me insane!

Is it actually coming from the hatch? I have seen another post remarking about the tail light sqeaking. When I wax the car, the rear bumper makes creaking noises as the bumper mashes/temporarily sticks against the substance behind it, foam maybe?

John

Yeah I've heard that squeak in the rear too, it's the bumper cover squeaking against the styrofoam beam that sits behind it (between the bumper cover and the hard parts of the car).

Well you know how rattles are.....I'm 90% certain it's from the hatch. This week I plan on getting back there and having my wife drive the car so I can hopefully pin it down. If I have any luck I'll let you know.

the fuel pump usually whines....might very well be what you are talking about.

It's not the hatch..I thought the same thing. Look for my other post regarding the rattles. It's coming from the locking mechanism for the fuel door. It's located behind the right rear panel.

Since I insulated this, I've been rattle free.

-ZCarGo-

I agree - that's almost certainly what it is. I'm not sure what all the whining is about.

Are you guys referring to the whine when you start up in ACC? Do you hear the whine for a couple of seconds when you go back to OFF?

It could be the drive-by-wire throttle. Our cars, like the G37, still have e-throttles. It does a self test when you first turn on your car, and you can hear it go back to home position when you turn it off.

That's the only whine I would notice besides 1/2 gear whine lol.

It certainly sounds like the kind of sound that could be a fuel pump. The only thing is, our fuel pump is on the tank itself, and the sound seems to come from up front. Maybe the sound just carries funny though.

In any case, it doesn't really bother me, but I do hear it, and I just wanted to track down what the hell it is.

Is the fuel pump in-tank since I was thinking the fuel pressure regulator would be situated in the engine bay. If that's the case, then the regulator is loud. 350Z had this noise whose pitch changes when you rev it. It's loud on cold starts.

I notice a possibly similar noise. It is an intermittent high pitched whine that seems to be coming from the center dash behind where the nav system would be (I don't have the nav system or sports package, pretty much just the basic touring). I hear it only when moving and it does not vary with engine speed or car speed. Road noise does not cover it up. It sounds like one of the highest frequencies I hear on a commercial airplane when flying. It can continue for minutes or hours and stop for the same random amount of time. It isn't my tinitus as I can ignore that and it will go away, but it has a similar pitch and doesn't go away! Really kills the enjoyment of driving the car.

That was my first thought as well.

------------------------BULLETIN JUST POSTED----------------------
ALL 370Z & G37 ECUs being replaced if you bring them in.
Problem Solved: Elmination of the high pitch frequency noise coming from ECU and hurting peoples' ears.

I know this is a very old thread but I was wondering is people targeted this sound.
I Have a very sensitive ear and hear this annoying sound when radio is off and windows are up. My friend who got the Z the same day I did has the same sound.
Any solutions?