Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Buzzing noise/humming noise 2002 Toyota Highlander › Reply To: Buzzing noise/humming noise 2002 Toyota Highlander March 2, 2021 at 1:25 pm #989192 Richard KirshyParticipant Could be several different possibilities Exhaust / heat shield(s) Brakes Engine / transmission mount(s) U-joint(s) Bearing(s) Fan shroud You’ll need to start checking off items to narrow down the source.