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      04-16-2019, 04:50 PM   #19
TLK
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Drives: '14 M5 CP, '12 550i, '04 545i
Join Date: Sep 2016
Location: SF Bay, CA

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It isn't related to the servotronic setting. That just controls the hydraulic pump response. This particular sound comes from the little motor that shakes the steering wheel on the driver assist equipped wheel. It is not the motor working and making a sound, it is the metal housing surrounding the motor that produces the noise or something rattling inside.

Design flaw. That's why BMW is supposed to replace them on cars under warranty.
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