If the noise is coming from the back part of the car it's the fuel pump isn't it?

I have a feeling i'm hearing the fuel pump... it's loud at a cold start and then dies away... after awhile i can only hear it when i've pulled up at the lights which is different from most of you guys...

You Z guys need to get your service folks to work with Consumer Affairs like those of us on the G side have. I went to my service guy first and mentioned that I saw there was a fix for the problem. He discussed with the CA folks when he saw them and he called me in for the fix. I've seen where some others have gone straight to the CA folks first, and that may work, but I felt that I owed it to my service guy to go to him first since he had done a great job on everything else that I brought him, and I had already had him hunt for the problem before.

You will know for sure if noise is there
 

If it doesnt drive you madd then you are not reffering to the sound that some of us are... If you have good enough hearing it is an ear splitting noise that ruins the experience of driving the Z. Not subtle at all, and not present in every Z. So to those who don't hear it, it's not an issue for you. No use in trying to "listen" for it as a precaution. Like i've PM'd many of you, it is a problem that nissan has acknowledged and is covered under your warranty. As far as part numbers there seems to be a slite discrepency over what the fix is. I know for me, the part number ended in 3b. My drive home after having the part replaced was both a relief and a "re-bonding" ride with my beloved Z.

Thanks everyone for their input in solving this issue. I thought I had hearing problems and glad to know it's not my ears that's busted.

I brought my car into the dealer and they can't hear it, anyone have any tips on how to help out the technicians to hear the sound, its very likely because they work in a loud environment their hearing deteriorated over time. I called Nissan and they couldn't help me they said they rely on the dealerships to diagnose the issue. If they can't replicate the problem nothing can be done.

If anyone knows any helpful tips or people to call that would be great.

Thanks

Tell them to put a young person in the car, preferably a young female, even if they have to grab someone out of sales. They can pick up on the sound pretty easily.

Older service techs simply can't hear that frequency.

My high frequency noise has gone away. Not sure WTF happened, but it's just simply gone now.

You're getting old :tup:

:bowrofl:

I hope that happens with mine. I just noticed mine starting to get it..8000 miles. I really don't want to have to deal with getting it fixed. If i turn the radio up (which it usually is) I don't notice it but if I have the radio down, and I'm sitting (not driving) its noticeable. Frustrating!!!

I'm old. Maybe mine will go away too.

Mine has officially brainwashed me. I sell Nissan's in my spare time now.

I've heard it before but only once in a while and its not too uptrusive, usually in the garage before I shut off the engine

i didnt notice it until a little while ago because i usually have music on or the windows down. i hear it now but its somewhat faint and no one else really noticed it except for one girl

Funny thing is I did recommend that and they seem somewhat offended and just replied no one is available otherwise they don't want to waste time on this and want to move on. It's frustrating to go back and forth with the dealers and they think your crazy or annoying.

To be honest I don't hear all the time but when I do it bugs the crap out of me and you know what you buy a new car you don't want one that is broken in any way and it's simply about principle for me. The manufacturer can at least address the issue rather than play dumb. I'll try again but I hope a TSB is up which I doubt cause the ECU is pricey. Hopefully before my warranty expires lol

Thanks everyone for their help!

Sorry to revive an old thread but this was the most recent one I could find when I searched.

I am sad....

My Car now has the annoying high frequency noise. I hear it whenever the car is moving..as I come a stop, you hear it stop..when I go, just nearing 1000rpm..off it starts again... It's especially aggravating when I turn to look out my drivers window and my right ear faces the passenger side front/glove box area. It's becomes even louder.

I have only driven the car a few times in town since my Vegas trip (the high frequency noise started long before my oil temp vegas trip issue). It's going in to have the oil changed, the rear hatch issue fixed (hopefully) and I'm going to try and get them to listen to this high frequency noise. I know some people say its not that bad. But for me, it is. And now..its all I seem to hear, now that it's happening. I have 9300 miles on the car...seems like it started around 8000 mile-ish. I was SO crossing my fingers that I wouldn't get this noise. Sucks :(

I went to the Mercedes dealer because my H2 keeps having issues and is on it's last leg. Drove a GL450. Only problem is, my husband may say I have to get rid of the Z. It's a tough call, I'm becoming so frustrated with my little issues on this car. I LOVE MY CAR :( But...

wish i could say it goes away with time/mileage but i have 41k on mine now and its still there.