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Can anyone identify this?

Discussion in 'A3/S3 Forum (8L Chassis)' started by immac, Jul 2, 2013.

  1. immac
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    immac New Member

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    Can anyone identify this box on my Audi A3 1.8T 8L 1999. It is on the back wall of engine bay to the right. The cap is missing and there seems to be a diaphragm. What does it do, what is it called?
    I´ve borrowed this picture off Internet (not my car) and circled item in question.
    What is this.jpg

    Thanks

    Ian
    Last edited: Jul 2, 2013
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  2. Lavis89
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    Lavis89 Member

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    isn't there usually a relay in there? i might be shooting in the dark a bit here but people usually remove this box and put the relay in the trunking next to it when mounting a oil catch can
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  3. BENJAMIN
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    BENJAMIN Member

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    Barometric pressure sensor. Measures atmospheric pressure to compensate your cars fuelling/timing.
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  4. Lavis89
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    Lavis89 Member

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    yup i was definitely shooting in the dark. hahahahaha
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  5. immac
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    immac New Member

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    Thanks guys! One of the problems working on this project in Turkey is the language confusion. This answer addresses another problem we were having on the diagnostics which were showing a "height" (in translation) problem, which we were trying to deal with. Because we could see a small diaphragm on this fitting we guessed it might be something to do with it, but were not sure.

    Ian
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