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Black flexi pipe by cabin filter?

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Shaunos, Jun 3, 2013.

  1. Shaunos

    Shaunos New Member

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    Changed the cabin filter on my A4 at the weekend found a black flexi pipe (like tiny kopex). It has a oval shape plastic washer glued on the end. What's this pipe for?
     
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  3. marky67

    marky67 Member

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    I assume it's a breather pipe for the battery.... as that's where mine is attached.
     
  4. jdp1962

    jdp1962 Grumpy Old Moderator
    Staff Member Moderator Audi S4

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    I agrew with Marky. On mine, the pipe comes from a little hole on the side of the battery, and disappears down the side of the cabin filter housing.
     

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