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C4maro · 11-08-2023, 02:57 PM

Is the flap controlled by engine vacuum or a little vacuum pump that’s powered electrically?

11-08-2023, 02:57 PM	#409
C4maro Private First Class 81 Rep 184 Posts Drives: 335i Join Date: Aug 2018 Location: Canada iTrader: (0)	Is the flap controlled by engine vacuum or a little vacuum pump that’s powered electrically?
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