Question about 1999 Audi A4

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1999 Audi A4 Locking mechanism

The locks on my car all of a sudden do not work either manually (button in car) or by remote. When I push the remote the Hazard lights flash and turns on the alarm as usual but, nothing moves mechanically (the knobs do not go up and down). I have tried interchanging the fuses but, nothing changed the result. Any suggestions....I don't want to take it to a mechanic or a dealer to get robbed for something that might be simple.

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  • thmjohns Jul 27, 2008

    Thanks. How do we know if it is the pump or the lines? What do these pumps run? Thanks for the help j_del.

  • thmjohns Jul 27, 2008

    Do you know where I can find a pump part # 8LO 862 257N?  I can't sem to find one cheap.  Thanks.

  • Anonymous Jan 05, 2009

    Finding new parts used is not turning out to be easy (for me).



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It sounds like the vacuum pump has gone out. The locks are vacuum-pump operated, and they're known to eventually fail on these and VW cars. Check that out - in my 99, the unit is in the trunk, passenger side. You have to remove the storage well between the wheel arch and the taillight, and pull the carpeting back, and the unit is down there just a bit below floor level.

Posted on Jul 26, 2008

  • Jeremy Dellow
    Jeremy Dellow Jul 27, 2008

    I suppose it could be the lines - anything is possible - but I've never heard of a problem with them. Since the pump is mechanical and is the part actually doing the work, and the lines are just hollow tubes that are hidden away pretty safely inside the body of the car, I'd really lean toward the pump in this case.

  • Jeremy Dellow
    Jeremy Dellow Jul 28, 2008

    Yep - I'd get in touch with Shokan Audi Salvage in Shokan, NY ( - they're a VW/Audi salvage yard with tons of parts cars. I've dealt with them before after they were recommended by several people, and found them to be very helpful. They'll ship anywhere as well - go to their website and you can get a phone number from them. You might even run the symptoms by them as well - they may be able to give you additional feedback on the problem (although I'm only presuming that).



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