when i sit in the car in the morning warming it up i can hear the whine. if i move my head around i can hear it better then not at all. the younger you are the more audible it is. if the tech cant hear it at nissan see if they have any young staff members around that can see if they hear it.

I brought mine in today. I hope the warranty covers it, I have 48k miles on my 2009. All I could find was warranty language for California...I live in Arizona, granted, the car was originally bought and maintained in Cali. The service rep called me a little while ago to let me know they couldn't reach the tech line today. At least they're trying. Update when all is said and done. Below is a link to the whine.

Engine Compartment Whine

Throttle Body Whine
 

I had my ECM replaced and still experienced the whine. Did a little further reading and did a little testing, and it turns out it's the THROTTLE BODIES! Here is how you can tell if the noise is coming from your throttle bodies or ECM.

1. Pop your hood.
2. Put the car in Neutral.
3. Set ignition to ON.
4. Roll your windows down.
   
5. At this point...it should be silent.
   
6. Now put the car into gear. I usually go with 2nd. You should hear the whine start right away.
   
7. Now put your ear near each throttle body and confirm. I could hear each throttle body whining.

I had my service manager convinced it was the ECM...and it turns out that wasn't the problem. Here is a video of the noise well. Car is in gear.

Throttle Body Whine

:tiphat: