Quote:
Originally Posted by Climate Changer
I’ve been doing research on all bmw models with the flap rattle on the forums.
Most do say when they mod the faps to stay open the rattling stops.
I came upon an easy way to keep the fap permanently open by removing fuse 146. I have the 230i exhaust. For the M235i/M240i fuse 146 & 147 in the trunk.
I removed the fuse while the valve was open and so far one day later no rattle.
I’ll update in a few more days.
I did hear it’s difficult to install the pin spring clip.
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That or you can unplug the sensor right behind the flap. Make sure it opens when you unplug though.
