2009 Prius, I can hear it only when the car is stopped, brake stop at a light/traffic or when parked. I have recorded it, unable to include a link or upload an mp3 It seems to come right the driver side under the hood, somewhere below the battery/engine. Appreciate any help.
Can you tell us more details about the car and the noise? Maybe upload it to a soundcloud account and then link to it?
Probably due to a five post minimum imposed by the website. Once you cross that threshold here, try again to link it.
I had what sounded like a tapping or grinding in my 2006 that turned out to be the water pump. On the left side as you face the car from the front.