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      07-03-2020, 04:24 PM   #7
Teamarie
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Drives: 2015 BMW 328i
Join Date: Oct 2019
Location: Anaheim, CA

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Same thing happened to me. I’m not sure what it links up to under the cover. But the end that got disconnected is to a nipple on the air box. Super easy to break off. Have you recently had your air filter replaced? Might’ve been torn off when the cover was taken off to replace filter inside. It’s an evap hose from what I’ve been told. May set a CEL light but would take a while. You now have unfiltered and unmetered air being sucked into engine as long as it’s disconnected like that. Not a lot, but should be fixed. This is what I was told by my Indy BMW mechanic. I’m a girl who doesn’t know as much as a lot of posters here but hope it helps. Also, if the plastic nipple broke off (which I’m sure it did) the only real fix is replacing the whole air filter housing. The part itself is around $200-300 new, but maybe you could find cheaper used or on eBay, idk.
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