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Old 11-07-2010, 07:57 PM   #2 (permalink)
RobertSmalls
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Join Date: Aug 2008
Location: Buffalo, NY, USA
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Prius C - '12 Toyota Prius C
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The inverter, which is located behind the rear seats, gives off a high-pitched whine during assist and regen. It makes the same sound wihle you're cranking the engine. Mine isn't "loud", but you can hear it if you listen for it. It's pretty much silent when you're not on the assist/regen.
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