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GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

hiss from driver side

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Old Oct 3, 2016 | 01:54 PM
  #1  
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Hanxious
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Default hiss from driver side

My 06 GS300 has a constant hiss sound from the rear driver side. Sounds like its coming from the wheel well area or under the car. Is this normal?

At first I thought the tire was leaking, but it goes away when the ignition is off. It comes on as soon as the car starts.
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Old Oct 3, 2016 | 06:19 PM
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Hard to say if it's normal without hearing it

For starters, turn on the car with the hood open and see if there's any obvious source of the sound in the engine compartment. If you don't hear anything from there, turn off the fan and see if the hiss goes away to see if it's coming from air duct

Last edited by Sodium; Oct 3, 2016 at 06:22 PM.
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Old Oct 10, 2016 | 12:15 PM
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I have the same thing on my GS300.
I managed to locate it around the fuel tank - it seems to be coming directly from it.
I just assumed it was the pump being loud, and stopped there.
Can anyone else check? It's coming from just below the rear door.
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