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BMW - Thump Sound When Blower On

X3 E83 (2004 - 2010) - Bimmerfest - BMW Forums - www.bimmerfest.com
08 X3 , MT - when warmed up and blower on I get a periodic ( every 3 seconds ) thump sound that seems to be coming from the rear of the engine compartment about where the blower fan would be - goes away when blower turned off.

anyone experience the same ? anyone have any thoughts on what might be causing the sound ?

thanks in advance to those who respond .
Date: Jan 21, 2014    Labels: BMW


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