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  1. #1
    Established Member Two Rings
    Join Date
    Mar 02 2017
    AZ Member #
    Ann Arbor MI

    02 Allroad spongy brake pedal

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    Pads and rotors are good. I've gravity bled the system multiple times but the brake pedal stays soft and spongy. Recommendations on what to do next?

  2. #2
    Veteran Member Four Rings Audibot's Avatar
    Join Date
    May 20 2010
    AZ Member #

    Maybe an issue with brake booster?
    2016 A6 TDI Prestige - S-Line, Black Optics, Driver Assistance, HUD, LED Headlights, Cold Weather, Warm Weather
    2003 allroad 6MT - STUKLR Stage 1, Hotchkis sway bars, RS4 engine mounts, Apikol rear diff mounts

  3. #3
    Veteran Member Four Rings PaperToast's Avatar
    Join Date
    Apr 29 2009
    AZ Member #
    My Garage
    Longmont, CO

    i think there is a vacuum line that helps with the booster
    check that for cracks/breaks/leaks
    Rockin' the Rockies
    '01 allroad, 240k woot woot, still boosting on original turbos and tippy, slightly more modified. . .

    Scotty@Advanced, "Push it off a cliff, when it hits the ground you should have a few thousand horsepower available for a brief second."

  4. #4
    Veteran Member Four Rings
    Join Date
    Sep 11 2009
    AZ Member #

    in addition to normal bleeding of the brake system you also need to bleed EPS pump which is only doable with VAG-COM/VCDS or equivalent tool (Xtool for example). Using the tool you can direct ABS module to engage the pump and bleed any residual air trapped in there.

  5. #5
    Active Member Two Rings
    Join Date
    Dec 01 2017
    AZ Member #
    Olathe, CO

    Yep. Got to do this to mine yet. I see that the Bentley also says to do a weird bleeding order, RF, LF, RR, LR is the correct order on this car.


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