All you guys have to do is just wait like 10 years and then you'll be old enough so that you can't hear the high pitched whine anymore. Problem solved! :ughdance:

I just started hearing this after having disconnected my battery. I wonder if disconnecting it again might stop it?

For what it's worth, I had a TV that used to do this, and I had a tech come out and he identified the transistor that was making the sound, applied a glob of silicone sealant on it and it stopped for good. The transistors can vibrate ultrasonically and that's what caused the noise. Now if I can just locate the transistor at fault, I'm betting we can fix it at home for a few bucks.

This could be the bearing on the timing chain. I had the same problem on my 05' frontier. My dealer told me that sometimes in the vq engines that Nissan sometimes does not put enough grease In The bearing thus making it prematurely wear.

It's absolutely the ECU, it's been confirmed in many other threads. People have swapped out parts with no avail, and then new ecu = fixed. I'm just trying to avoid an out-of-warranty expense.

I know it's like electrical tape on a check engine light, but has anyone just dyna-matted the ecu?

Nah. This is a different noise that comes from the glove compartment area that is ultra-high pitched.

I'm coming up on 36k miles and need to get mine replaced. Hopefully the dealership doesn't give me an issue with it... driving with the radio off is just about impossible because it's so annoying.

I took my car in last week to get this looked into. I told them it was a high-pitched whining noise similar to a dog whistle, that this is a known issue on the '09 model (I guess some '10s as well), it is coming from the passenger area, and to talk with a Nissan Rep if they are unsure.

The guy said this was really odd and that he had never heard of this before, but would look into it. When he called me back, he said at first they could not find the noise, but eventually one of the employees was able to hear the noise and confirm it was coming from the ECM and that the parts were ordered to replace it.

I was expecting a much harder fight to get the issue addressed, but I think if you let them know that they should get with a Nissan Rep you will be in good positioning even if they cannot hear the noise.

I would suggest not letting this noise linger much at all. It gets seriously painful if left unaddressed.

I agree. I plan on telling them about where it's coming from along with the suggestion that they may have to call the tech line to get info about it. The dog while description is spot-on. I should have it in this coming week- I'll update on whether or not I have to fight with the dealer.

On another note, I've noticed my car is consuming oil at the rate of about 1 quart per 1250 miles. Yay.

well, dropped the car off today, told them all about the parts, etc, and they can hear the noise, but can't find where it's coming from. service rep said they need to take apart the dash and find where it's coming from "module by module"

durrrr

ill be driving a rental starting monday when i drop the car back off

cant wait for them to find out it's the stupid ecm

Sorry for resurrecting an old thread, but do you have any update re: your "mystery" noise, and by mystery I mean your ECU?

I just picked up an 09 Z and learned that the warranty ran out 3 weeks sooner than the dealership told me. (I should have done more due diligence and double checked.)

I had a few things fixed under warranty, but this issue eluded me until it was too late.

I took it to a Nissan dealership today and two techs drove it, neither could hear the tone. I'm doing a drive-along with a tech on Thursday and would like to give them as much information as possible.

Any new news on a TSB or other official correspondence from Nissan re: this issue?

Thanks

No TSB that I know of.

Nissan had the car for three weeks and finally determined it was the ECU (they call it the ECM). They ordered the wrong module to replace it with and by then I needed the car back for an event. They said they would call me when they got the correct part in. Haven't heard from them. (big surprise)

The car is eating oil badly so I need to go back to start an oil consumption test. Going to tell them just to replace the ECM while it's there. Probably going to have them install some headers also while the engine is out.

I'm now past the warranty period but since I opened the claim beforehand it still applies, so whatever.

Dang, thanks for the info. I guess I'll try to point it out the best I can when I have the tech in the car w/ me.

This is gonna hit the wallet hard. New exhaust will have to wait a bit.

I've been recently hearing this high frequency sound coming from my trunk area. It's annoying as hell.

If it's coming from behind, it's most likely the fuel pump, not the ecm.

Took my car in about two weeks ago (4 days before warranty expired) and they confirmed it's the ecm. They said they would call me to come back in as soon the new ecm arrives. Haven't heard of them as of today, but planning to call tomorrow. My warranty is now expired, but I think it will still be covered because my claim was opened during warranty period. I hope I'm right.

if the techs cant hear it then have a young woman sit in it. im serious. the younger you are the more ear hairs you have that can detect the high pitch noise. ive read on here the same story you guys are telling. then these dealerships had the receptionist sit in the car and she heard it right away!