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Replacing rear ABS sensor A3 1.8 1996

Discussion in 'A3/S3 Forum (8L Chassis)' started by Burdog3410, Jun 18, 2010.

  1. Burdog3410
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    Burdog3410 New Member

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    I've had my A3 for two years now, and starting to get peeved with the useless ABS system.. last year I had to replace the Pump, and 12 months on, MOT due, and the bloody ABS lights come on again :eek:(

    I've had a garage run a diag and been told the OS Rear sensor needs replacing.... have got part number from Audi
    1j0927807b... and found new part on ebay for £17...

    One problem remains... havent got a scooby how to replace it :eek:(

    Can someone tell me where its located, how to replace it, and anything I need to be aware of????

    Please Helppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

    PS I service the car myself but dont know how to get rid of the 'Service' from the digital odometer... any suggestions? Thanx
    #1
  2. Robbo1144
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    Robbo1144 Faster in reverse

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    alright mate, just had the same problem with my a3 o/sr wheel speed sensor, it was mangled though lol,
    jack the back end up,
    wheel off,
    remove the caliper and disk,
    theres a wire behind the dust shield which connects to the sensor ( its the only wire anywhere near the back disk)
    remove that wire,
    remove the allen key bolt,
    then the sensor should come out ( my one was pretty stiff, hence the reason for removing the disk, as i had to go at it with a brass drift and a hammer haha)
    put the new sensor in,
    allen bolt in and connect the wire,
    disk and caliper on,
    wheel on.
    and bobs ur cat
    ABS light will most definatley be on still, so VAG-COM and clear the fault code.
    Worked for me mate, watch your brake pipes, i decided to snap one by mistake.

    as for the service indicator, vag com again :)
    hope that helps,
    Robbo
    #2
  3. Robbo1144
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    Robbo1144 Faster in reverse

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    forgot to mention, remove the hand brake cable lol, you dont need to remove the brake line, just need to watch you dont snap it or burst the rubber bit
    #3
  4. deeman88
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    deeman88 Watch this space...

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    my abs light is on and its VCDS is saying this....

    [​IMG]

    do you need to remove the disk and pad? or can you take the sensor off without doing so??
    #4
  5. marrick92
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    marrick92 Member

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    i think you could, but it makes things much easier with the caliper and disc off. caliper just has 2 bolts holding it in, simples! -- then the disc has 1 cross head bolt :)
    #5
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  6. deeman88
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    deeman88 Watch this space...

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    Sound pretty simple there mate, thanks :)
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  7. Alais DJA
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    Alais DJA Member

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    ABS Sensor.....


    What? that thing you un-clip, pull out - and push new one back on?
    #7
  8. marrick92
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    marrick92 Member

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    Is that the one that tends to be seized in and requires mallet access?
    #8
  9. Alais DJA
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    Alais DJA Member

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    Must have been my ratchet grip.

    Dont forget to grease 'em up....just incase they go again.

    But uh....removing things to replace. The wheel was about as far as it went.
    #9
  10. Perplexer
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    Perplexer Member

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    This is what my mechanic did to change the rear sensor on mine.

    Isn't there some discussion around using none Audi sensors for these could be detrimental?
    #10
  11. Alais DJA
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    Alais DJA Member

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    I put aftermarket one's on mine all round. £45 each from audi, full set aftermarket - £33...hmmmm
    #11
  12. deeman88
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    deeman88 Watch this space...

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    im more worried about the rear sensors, as i dont think that they have been changed since 1999. but will do try this soon :)
    #12

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