Chris NottVolks Autos
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  1. #1
    Reverse Gear

    Join Date
    Jun 2006

    S4 Brake Assembly an ABS sensor - Description?

    My ABS light is off, but I am gettin the occasionl shudder though the brake pedal. I hve been told this could be a sensor needs cleaning.

    Not that I am going to do this myself, but does anyone have any pictures of the assembly so I can understand the problem?

    And what the hell are all those smilies??? Not noticed them before.

  2. # ADS
    Join Date
  3. #2
    "Stick a V8 in it!"

    Join Date
    Jan 2008
    Glenrothes, Fife, Scotland
    the sensors are hall effect sensors and are mounted in the hub assy on the front and read off a toothed wheel on the CV joint, they can build up random bits of metal crap and this can effect their readings

    you should be able to pull the sensor out of the hub, clean the sensor and the hole with solvent (brake cleaner or similar) and put it back, but they can be damn tight to get out

    the rear ones on a fwd sit in the backing plate and read from a pickup wheel on the back of the disk. not sure about the quattro bit i'd imagine it'd be more like the fronts.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build



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