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Interesting, I'll have to investigate further. The flapper valve has been around since at least 2006. The funny thing is, our 06 X3 doesn't have it while others have reported that they have one. I'll report back. Shutting the engine off isn't an option, don't wanna lose the fun factor of the ULTIMATE DRIVING MACHINE!!!!!!!!!!
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2013 X3 Msport, White/Black Montana, M-Sport/Prem Pkg, Dynamic Handling, Xenons, Cold Weather, HU, Prem Stereo
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