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 3, 2021 at 6:57 pm #989210 Joshua JohnsonParticipant Its more of a buzzing sound, and gets loud if you put floor the gas pedal, i will check out the heat shield tomorrow.