Kuto wrote:OK, I found out what it is today.
It is actually the passenger site climate control, over the feet air vent. when the heat is on and air is blowing from the vent right over passengers feet, it gives a whistle sound.
I am still not sure if it is the air making the sound from a wrongly shaped tunnel, or the motor for the fan is defective. Anyway, I am just happy it is not from the Engine/Powertrain.
Interesting. Do you hear it only when the fan is running fast? Next time I get in my Pathfinder I will see if I can recreate when you are talking about. But I think that I would have heard it by now if the problem existed in my car.