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      09-07-2012, 01:37 AM   #8
rzm3
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Drives: E92 M3
Join Date: Aug 2007
Location: USA

iTrader: (17)

NVH = Noise, vibration, and harshness

When you turn your steering wheel, the struts turn, and the springs turn with the struts. The upper spring perches have bearings above them, which allow the springs to rotate smoothly.

I suspect that the noise is coming from one of these mechanisms.

Best way to find out for sure? Install the factory upper mounts.