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BMW 3-Series (E90 E92) Forum
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E93 Hiss Normal?
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| 04-06-2020, 04:13 PM | #1 |
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Private
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E93 Hiss Normal?
I've been hearing a slight hiss coming from the suspension area when going over bumps. It's very faint and only truly noticeable when the top is down and the radio is off. It's a 2013 with 52k miles... perfect in every other way. Suspension feels nice. Is this hiss normal?
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| 04-06-2020, 09:47 PM | #2 |
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Private
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Drives: 2009 BMW 328i Convertible
Join Date: Aug 2019
Location: TX
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is it from the front or rear, left or right?
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| 04-06-2020, 09:49 PM | #3 | |
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Quote:
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| 04-06-2020, 10:05 PM | #4 |
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Private
19
Rep 77
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Drives: 2009 BMW 328i Convertible
Join Date: Aug 2019
Location: TX
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this might help https://www.e90post.com/forums/showt...highlight=hiss
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| 04-06-2020, 10:20 PM | #5 |
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Is it the shoes!?
3884
Rep 5,112
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Yes. My shocks and struts still do this after replacing it. My bike's suspension makes that noise as well. It's a normal operating sound.
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| 04-07-2020, 07:09 PM | #7 |
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Captain
 
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Rep 733
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As others have said, it's normal. When you go over bumps, fluid within the shocks is forced through tiny orifices at very high pressure- this is the cause of the hiss.
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