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  • Buzzing Sound RHF of car

    Hi Everyone,
    I have a mystery sound for you all. The sound is like a buzz\wurring noise coming from the front RH side of the car. Now here's the catch. It only comes on after 30kmh. Does not increase in frequency or speed or engine revs. Is not dependant on which gear your in or what the temperature is. Not affected by breaking either. This buzz only ceases when you drop below 30kmh. It is a constant frequency buzz which is sometime noticeable with the windows up but you can really hear it with the windows down, coming from the front drivers side wheel area. Really, it sounds like a killer wasp is stuck under the bonnet trying to get out via the wheel arch.
    The car is a 150 series Prado, Auto V6 petrol with 130k on the clock

  • #2
    Guard liner or something blowing onto tyre? Wind pressure drops relevant to speed. Causing it to stop?

    Comment


    • #3
      Nope, nothing rubbing on the tyre. It kinda sounds like air bleeding through a valve, but more like a buzz than a hiss if you know what I mean.

      Comment


      • #4
        Originally posted by Piggy View Post
        Guard liner or something blowing onto tyre? Wind pressure drops relevant to speed. Causing it to stop?

        Nope, nothing rubbing on the tyre. It kinda sounds like air bleeding through a valve, but more like a buzz than a hiss if you know what I mean.

        Comment


        • #5
          Piece of tape unravelled from a loom or something a bit and blowing in wind would be my next guess.

          Comment


          • #6
            Originally posted by Piggy View Post
            Piece of tape unravelled from a loom or something a bit and blowing in wind would be my next guess.
            its not anything flapping in the wind or rubbing. If it was then it would increase and slow down with speed. This is not the case. It must be something that is switched on electrically. Some sort of system or device that comes on at a certain speed. It sounds like air being squeezed through a breather or something.

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            • #7
              I think it has something to do with the brakes. If you have the car on but not running (all dash lights on) press the brake pedal think you will find it changes noise too.

              My guess it's an electric pump to do with the brake system.

              Comment


              • #8
                Originally posted by j_c View Post
                I think it has something to do with the brakes. If you have the car on but not running (all dash lights on) press the brake pedal think you will find it changes noise too.

                My guess it's an electric pump to do with the brake system.
                I have disconnected the power to the brake solenoid/actuator and gone for a drive. I have also disconnected the brake sensors for each wheel. No difference. I also disconnected the power steering pump sensor as well. I got all the warning lights on the dash but no difference in the noise coming from under the car.

                Comment


                • #9
                  I would still back the plastic inner guard moving around. They are very flexible, the plastic tabs which hold them wear and get loose etc. Try getting some old fuel hose and shoving short bits into any joint. Also the front rhs inner guard rubs up against the windscreen washer bottle. Start cheap/free!

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