Hi. As expected, the fuel pump replacement didn't help a bit. The noise is still there.
I didn't even take the car with me. I left it there for another try. This time, the original rep who could hear the noise wasn't available, so I made the check-in with another guy. He said he couldn't hear anything even the first time they've tried it so he cannot confirm it. So I asked him to try again, and again, he couldn't hear it, so I asked if a woman from their office could give it a try. She couldn't hear it either, but when I said it's like a ringing in your ear, she finally recognized it and confirmed that it's very unpleasant. After that, even the guy could hear it!
I guess they were looking for some other kind of sound.
Nevertheless, now everybody from Nissan reps can hear the noise! I have really sensitive ears, but now that basically anybody can hear this sound, it shows how bad it is. I took my audio spectrum analyzer again and pointed out the sound is coming from under the glove box and the rep made note of everything. I even mentioned the other people on the web complaining about this and how ECU replacement fixed their issue.
I can't believe Nissan is doing NOTHING about this!
Now we wait. I really don't care if the car is stuck there for the next 14 days, because I can't drive it anyway. I won't. Getting a headache from driving a car for an hour is not normal!
Fingers crossed this will be the last attempt. Wish me luck!