- How many hoses go into airbox
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    1. 06-02-2019 03:05 AM #1
      I just have the big hose going into the airbox, that one is obvious. But I noticed that underneath that there is another hole, like something is supposed to connect there.

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    3. 06-03-2019 08:32 PM #2
      Secondary air injection pump
      2004 Passat 1.8t 4motion
      2002.5 GTI 24v VR6 6 speed

    4. 06-09-2019 06:23 PM #3
      The part circled is what I'm talking about.

      Are you sure something is supposed to connect to that?

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    6. 06-09-2019 06:48 PM #4
      Mine didn't have a stock air box when I got it, so I'm not totally sure. That doesn't look like it would connect to a hose. Looks more like it's just an air inlet.
      2004 Passat 1.8t 4motion
      2002.5 GTI 24v VR6 6 speed

    7. Junior Member Zachcoats7's Avatar
      Join Date
      Oct 29th, 2015
      Winder GA
      2004 GTI VR6, 2014 Rline Beetle, 2016 Passat S
      06-11-2019 08:21 AM #5
      Nothing goes to it. If the airbox starts loosing air flow from the normal inlet, that flap opens up allowing air to flow in. It has a spring on the inside.

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