Question about 1993 Audi 100

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Where do i locate an ABS relay on a 1990 audi 100 and what is the part number?

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  • dave5177 Sep 08, 2009

    how do I access it? I see the brake lines but, how do I access the relay to change it?

  • dave5177 Sep 08, 2009

    I don't see how to access the relay to change it

  • dave5177 Sep 08, 2009

    I don't see how to access the abs electrical relay

  • dave5177 Sep 08, 2009

    this is the only thing that I get

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ABS Light On, ABS Relay Fuse Blown? The 1986 and later Audi 5000/100/200/S4's with Antilock Brake Systems (ABS) have a dedicated ABS relay which uses a fuse that is located in the top of the relay. The relay is usually located under the dash, on the drivers side (LHD vehicles) in the Aux relay panel. Always check this ABS fuse first, if you are having ABS issues.

Accessing the aux relay panel for the 1989-91 Audi 100/200 is shown here:

Auxiliary Relay Panel Under Dashboard
KNEE BAR (Lower Dash panel) Removal on 1989-91 Audi 200TQ with Air Bag

Normally, on the later 1989-91 200TQ's with drivers side air bag and knee bar, the knee bar needs to be removed to get at the auxiliary relay panel. This is a bit of a pain, but can be done without too muchcreaming. The side dash panel (cover) needs to be removed first, to allow you to get at two of the screws that secure the knee bar to the aluminum dash support.

There is usually one lower hex head screw securing this side panel cover, and after the removal of the screw, then the side panel is pulled down slightly, and then up and out. It does not come out or go in very easily.

After you get the side panel cover out, there are two hex head screws visible behind the cover holding the knee bar to the dash support.

There there are a few other allen head screws underneath the knee bar that need to be removed to allow the knee bar to come down and out. See, that wasn't so bad, now was it!

The knee bar will often have a stick on the back showing the location of the relays in the aux panel, but once again these diagrams are not always correct due to last minute production changes. The aux relay locations detailed in the Bentley manual also don't match up with what I found in my car.


On my late 1989 200TQ (11/88 build date), the auxiliary relay panel had the relays arranged as follows.

Top Row, left to right

Two circuit breakers, Driver side heated seat relay, Passenger side heated seat relay

Middle Row, Left to Right

Injector cooling fan relay, Seat Belt Buzzer Relay, Oil Pressure warning system relay, A/C Relay, Lamp Control Unit-Front

Bottom Row, Left to Right

Radiator Fan High Speed Relay, ABS Control Relay with 10 Amp Fuse, Window and Sunroof Relay (double wide relay)

where do i locate an ABS relay on a 1990 audi 100 - 9c2cc69.jpg

Diagram courtesy of Audi of America

I dont know exactly the OEM PART NUMBER, but in here you can find information: 1990 Audi 100 ABS Relay

I hope help you with this. Good luck.

Posted on Sep 08, 2009

  • ZJ Limited
    ZJ Limited Sep 08, 2009

    Basic Electrical Checks: Main
    Fuse and Relay Locations

    Here is the fuse and relay locations, as found under the front hood,
    near the windshield on the Audi 5000/200.

    Note: The locations of fuses #23 to #28 are reversed on the 1986-88
    Audi 5000 when compared to the 1989-90 Audi 100/200.

    The 1991 Audi 200/TQ has additional fuses #29 and #30.

    Diagram courtesy of Audi America

    Several other relays are mounted on the auxiliary relay panel under
    the dash on the 5000/200TQ. The Audi 5000's have a small cover on the
    lower dash area that often has a diagram showing the specific relay
    locations. You may want to use caution with these diagrams, as I have
    found a few that were incorrect.

    Often you will want to check the relay part number or the specific
    wiring details at the relay to ensure you have the correct relay. You
    can remove the lower dash cover panel(s) on the Audi 5000's to get a
    better look at the relays, this requiring only a Phillips screwdriver
    and flash light to locate the screws.

    Good luck.

  • ZJ Limited
    ZJ Limited Sep 08, 2009

    From Audi Parts:
    Manufacturer: WEHRLE

    Part Number: W0133-1639222

    Relay / ABS Relay

    Good luck.


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From this website which i will give you, it lists the part number as 431951253D &year=1990&cid=18@Electrical %26 Vacuum&gid=3604@Relay

As for the location it should be within the fuse panel box under the hood.

Posted on Sep 08, 2009

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Here it is

where do i locate an ABS relay on a 1990 audi 100 - 0502e96.jpg

Posted on Sep 08, 2009

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