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 11:50 am #989202 Matt MosquedaParticipant Lets start even simpler than that, exhaust heat shield? Is is more humming or more buzzing?