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  1. #1

    Join Date
    Aug 2008

    Does my A6 have a brake warning light?


    Had it serviced the other day and the Audi dealer said my front brakes are 90% worn and require replacing immediately.

    Surely some kind of warning light will come on when thats the case? (Or at least I'll hear crunching/the screams of my passengers?)

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  3. #2
    gupsterg's Avatar
    1st Gear

    Join Date
    Jun 2012
    Lurking over a keyboard!
    Yep front have sensors... should pop on at 3-4mm... IIRC if wiring broken to sensor pad wear light will come on as well...

    Link:- Brakes Technical Data

    Link:- Allocation of PR number (factory code) to brake components

    Link:- 2FNR 42 AL Servicing front brakes

    Link:- FN3 Servicing front brakes

    Link:- FNRG60 Servicing front brakes
    Last edited by gupsterg; 8th January 2013 at 14:44.

  4. #3
    FactionOne's Avatar

    Join Date
    May 2004
    This one regularly flummoxes me.

    If your C6 A6 has child locks on the rear doors, it's got diagnostics-capable modules for each, reporting their condition to the CAN gateway.

    The brakes however, are on a simple 'not-gated' circuit - if the circuit is broken (when the element running through the pads is worn through), the light comes on [and as above, if the circuit breaks anywhere else - a connector, wiring etc. - the light comes on; similarly if it shorts anywhere, it won't come on].

    ...However, as we all well know, [throughout the range for as long as I can remember] if you look at the plugs funny, the light comes on. Similarly, if you shout at it to go off and not come on again, there's every chance it'll do that too. It doesn't NEED to be as complicated a system as for childlocks (in the above example, or countless other systems), but I am somewhat surprised that for a system as important as braking, the technology hasn't been developed to make it a little more reliable/consistent in its behaviour.

    Case in point: A few weeks ago I spent a good couple of hours swearing at a caliper on my Dad's Golf Plus, which had begun to seize due to over extension through worn pads. No sign of a pad wear warning light, despite the car being equipped.

    It's a strange 'throw away' statement to make, but effectively I disregard the system entirely - and just check them myself periodically with a mark one eyeball.

    Not much help I know, but perhaps in some way reassuring to know that at least the condition isn't unusual.

    All the best,

    The truth they're trying to keep from you is that IPv6 has nothing to do with address space; we're actually running out of full stops.

  5. #4

    Join Date
    Aug 2008

    Thumbs up

    thanks all, I hoped that was the case!

    Could do without the cost just after xmas.



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