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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
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    Shaunos New Member

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    [Jun 3, 2013]
    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?
    #1
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  3. marky67
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    marky67 Member

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    [Jun 3, 2013]
    I assume it's a breather pipe for the battery.... as that's where mine is attached.
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  4. jdp1962
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    jdp1962 Grumpy Old Moderator Staff Member Moderator

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    [Jun 4, 2013]
    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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