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What is this on N/S front hub? Sensor??

Discussion in 'A3/S3 Forum (8L Chassis)' started by Bad Sir Culation, Dec 19, 2013.

  1. Bad Sir Culation
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    Bad Sir Culation Member

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    [Dec 19, 2013]
    I managed to spot this today when I was swapping over the front shocks. What is it? Where should it go? Does the fact it is sat loose like that mean that I now need to replace whatever it is?

    Sensor.jpg
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  3. desertstorm
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    desertstorm Well-Known Member

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    [Dec 19, 2013]
    Looks like a brake pad wear warning connection. Some brake pads don't come with this facility, I know the yellow stuff ones I had on my Passat didn't and to avoid getting a warning on the dash you need to short out the wires that would goto the pad.

    Karl.
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  4. sean_s3
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    sean_s3 Member

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    [Dec 19, 2013]
    Think that's the wiring for the brake pad wear sensor. Should be connected to the rear of the pad if using OEM pads.
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  5. Bad Sir Culation
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    Bad Sir Culation Member

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    [Dec 19, 2013]
    Thanks guys. Haven't had any warnings, so maybe it was connected somewhere and has come out while I've been working on it???

    I'll have a try and see if there's anywhere obvious that it can go. Don't particularly want it just flailing about!
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  6. sean_s3
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    sean_s3 Member

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    [Dec 19, 2013]
    If using non standard pads then the sensor can be tricked into thinking its connected and then secure it out of the way.
    Last edited: Dec 19, 2013
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  7. Bad Sir Culation
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    Bad Sir Culation Member

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    [Dec 19, 2013]
    I have no idea what they are, to be honest. Any easy way to tell?

    How do you trick it?
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  8. sean_s3
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    sean_s3 Member

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    [Dec 19, 2013]
    From memory its a 2 pronged connection that plugs into the back of the pad, the circuit needs to be complete for the ecu to believe its plugged in. Bit of wire to bridge the 2 connection points together and then secure out of the way. It must have already been done though otherwise you would get a warning sign on the DIS.
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