435i Intake flap?

Randy Johnson · 09-28-2019, 01:43 PM

There is a small trap door in the oem airbox on the 435i. Wondering what this is for. Tried a search but came up dry...

rphz · 09-30-2019, 07:42 PM

Quote:

Originally Posted by Randy Johnson

There is a small trap door in the oem airbox on the 435i. Wondering what this is for. Tried a search but came up dry...

It's a "snow valve" that is intended to open in the event your main intake pipe feeding the intake box clogs with snow. If you go to Dinan's website and take a look at their instructions for their cold air intake, they mention it (and how to bypass it in order to install their intake).

Randy Johnson · 10-01-2019, 11:57 AM

Thank you for the reply. I don’t think I need it in south fla.

thejeremyman9 · 10-15-2019, 01:24 PM

Is the circled part in the attached picture what you are talking about? I just noticed this the other day.

09-28-2019, 01:43 PM	#1
Randy Johnson M340i 392 Rep 967 Posts Drives: BMW M340i Join Date: Sep 2019 Location: South FLA iTrader: (1) Garage List 2021 BMW M340i [10.00]	435i Intake flap? There is a small trap door in the oem airbox on the 435i. Wondering what this is for. Tried a search but came up dry...
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10-01-2019, 11:57 AM	#3
Randy Johnson M340i 392 Rep 967 Posts Drives: BMW M340i Join Date: Sep 2019 Location: South FLA iTrader: (1) Garage List 2021 BMW M340i [10.00]	Thank you for the reply. I don’t think I need it in south fla.
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10-15-2019, 01:24 PM	#4
thejeremyman9 Major General 4358 Rep 7,598 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	Is the circled part in the attached picture what you are talking about? I just noticed this the other day. Attached Images
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