13k miles only.
I've been noticing this noise for the past few months and it wasn't as high-pitched. I noticed it has become louder today. It comes and goes inconsistently and I can't pinpoint where it's coming from exactly. I checked under the hood and engine bay thinking it was the belt or pulley but the noise was not coming from there. I also checked the suspension and ball joints but it's pretty normal. So I went under and fair enough it's louder down there. So I know for a fact it's coming from under the car, somewhere in the middle, but what is exactly? It's only visible loudly when the car is parked, idling. I don't hear it when the car is being driven or accelerating nor inside the car.
I've posted this on Facebook maintenance group but seems to lot say it's normal. I know what my car sounds like when it's normal. I know that the 4runner is a loud engine and makes strange noises, but this one doesn't seem normal and doesn't sound like it's coming directly from the engine.
See 2 videos. One is normal idling and the other one you'll hear the squeaking/high pitched noise.
Dropbox - 4runner - Simplify your life