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Old 09-16-2012, 09:21 AM   #10
thstone
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
It is most likely the engine compartment fan. This fan will start up and stop somewhat randomly to cool the mostly enclosed engine compartment. Air is exhausted through the passenger side vent.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
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