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      09-20-2012, 09:04 PM   #9
n54door
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Drives: 09' 135i 6AT FBO - MHD Tuned
Join Date: Sep 2011
Location: DFW

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tell them to measure the tolerances for the wastegate actuator arm and lever, and inspect the wastegate lever bushings. That will determine if you need the turbos/wg repaired.

Solenoids have nothing to do with a car rattling.

Remind them a obvious rattle/clanking sound is typically caused by sizeable mechanical parts (like wastegates levers) clanking around, it 'rattles'.