Thread: 35i/is Exhaust Rattle (Vacuum/Flap) FIX
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      10-28-2013, 06:24 AM   #19
ManiacGT
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Drives: Z4 sDrive 35i
Join Date: Jan 2011
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It is electronically controlled, the controller is inside the boot (trunk)... its just moved by vacuum actuator. Either way, its a crap design because it's well known to fail.
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