Toyota Highlander with loud humming noise

Water pumps tend to go bad at 100,000 miles.

there can be a crack on exhaust manifold or on eghaust muffler.

what kind of airplane..?no just kidding..maby see if you have a hole in exaust somewere.

this fan noise may be the coolant fan doing the job of cooling the radiator when there is no air flow through the radiator as in standing in a line or at lights. IN a drive through line you would have the window down and so the noise came to your attention when the fan cut in. However have it checked out by an accredited repair shop to put your mind at rest.

Hi, sounds like a bad wheel bearing, possible tire noise, if you can identify or narrow down which end of the car (front or rear) its coming from you can rotate your tires(front to back) and test drive and see if the sound moves to opposite end now. If not you can use a stethoscope or long screw drivers and spin each wheel by hand (vehicle not running!) and listen for a humming grinding sound while tires are off ground via a lift or jack.

sound like wheel bearings.

You probally have a bad front wheel bearing , when the noise changes when you move the wheel is typical of a bad bearing.this should be covered under your powertrain warr.

some of the brake material used will make that sound on toyota's and lexus.you need to try a differant type of brake pad.should help.

What kind of noise? Humming? Screeching? Can you tell if it's coming from front? Left? Right? Does it get louder the faster it goes? Higher pitch?

Sounds like a bad wheel bearing - have it checked out at a reputable shop and changed, the sooner the better.