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Haldex controll module leasking??? vagcom...help please

Discussion in 'A3/S3 Forum (8L Chassis)' started by scott_johnson, Feb 22, 2008.

  1. scott_johnson
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    scott_johnson Audiless

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    Hey all. Had my car on a mates vagcom as a yellow diagnostic light came on (dosent show it in the manual) a fault came up about a pressure drop between the re-circ and something else which came up as the old dv was nakerd and has been replaced... the other fault found was something about a leaking haldex module???? any body got any ideas????? is it vital i have it checked??? sorry i dont have the fault code, forgot to jot it down :( cheers
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  2. jbw
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    jbw Member

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    Haldex unit is to do with the Quattro system on A3/S3, I believe it controls the rear axle. Further info can be found: http://en.wikipedia.org/wiki/Haldex

    Personally I'd take it in and get it checked over.
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  3. scott_johnson
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    scott_johnson Audiless

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    lol. i no what a haldex is, i jus wanna no whats causing the fault to appear. hope its something and nothing!!!
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  4. keendean
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    keendean Member

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    I've got one second hand if you do need one, hope it's not your problem though :)
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  5. ash_s3
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    ash_s3 Active Member

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    The haldex controller is an ECU type module that controls the power going to the rear wheels
    Expensive and a bastard to replace, get it checked by a main dealer 1st though
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