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'11 Whistle sound when moving

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Old 06-30-15, 06:24 PM
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Mattstermh
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Default '11 Whistle sound when moving
My 2011 ES350 has 49k miles on it (just got it last week).

I just noticed that when moving slowly (with and without accelerating) I can hear a slight whistle sound that resembles a bird chirp coming from what I think is a wheel.

My dad can't hear the sound (I'm thinking the frequency is too high for his ears) but it is definitely there and I can hear it clearly.

The sound comes and goes but something is not right. Wonder what it is?
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Old 06-30-15, 10:02 PM
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GCL
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Perhaps it's the wear indicator on your brake pads. Should be easy to check. If I recall, OEM brake pads are worn when they hit 1 mm (yeah, I know... really shallow). Remember to check both pads per wheel.
Last edited by GCL; 06-30-15 at 10:15 PM.
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Old 07-01-15, 12:52 AM
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That's the belt roller.
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Old 07-01-15, 03:33 PM
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Originally Posted by LjeksesES
That's the belt roller.
Elaborate?
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Old 07-02-15, 12:54 AM
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Serpetine belt roller.


Do you hear it when stationary idling?
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Old 07-02-15, 09:07 PM
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Originally Posted by LjeksesES
Serpetine belt roller.


Do you hear it when stationary idling?
No, but I noticed it becomes slightly more pronounced when turning.
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Old 07-09-15, 05:34 AM
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Check the belt and the rollers.
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Old 07-09-15, 07:08 AM
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Turned out it was the breaks / pads
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