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      02-21-2013, 10:59 PM   #2
centexE9x
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Drives: e9x coupe
Join Date: Dec 2012
Location: austin

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There is an aux water pump inside the bumper down there. Prob what you're hearing. They will continue to cycle with the vehicle off to keep circulating water through the turbos. It's hard to tell just how loud it is from the vid but as long as there are no faults in the vehicle I'm would assume everything is ok.
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