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      03-04-2013, 04:37 PM   #7
Z K
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Drives: E90 M3
Join Date: Jul 2011
Location: San Francisco

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All polyurethane bushings require periodic servicing or else it will squeak. There is no way around this. There are some bushings designs that keep lube better on the surface so it requires less maintenance but none that are maintenance free.

That is why the OEM bushings are made from rubber. Rubber does not squeak and no maintenance besides replacement when they wear out.
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