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      09-15-2020, 06:34 PM   #13
pchansen
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Drives: 19 X7 50i13%C2%92 X328i
Join Date: Feb 2019
Location: PacNW

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Quote:
Originally Posted by jsmonet View Post
Lower tone? look at your wheel arches to see if the body's moving. That sounds like it's the air compressor for the suspension. It's normal for the compressor to relax when the car's off.
I'll take a look but I don't think so. It's more of an electronic sound.
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