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  1. #1
    Veteran Member Three Rings audiluxary's Avatar
    Join Date
    Nov 21 2007
    AZ Member #
    22745
    My Garage
    2001 Audi A4 1.8T/2002 S4 (Imola) stage 2
    Location
    The Sticks

    TCM/TCU location

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    This may be a dumb question but someone please tell me where the TCU is located. I know people have said under the passenger side floor board. Please be more specific as to where exactly it is. I pulled the right kick board off and I can't figure out how to pull the top kick board the one with the light in it down. I pulled my carpet up some and I still can't find the TCU container. Please help thanks.
    2001.5 1.8t


    GIAC FXK04 (Hammer) installed with a big fat cell...update, cell has been gone for a long time now but smells like it's running rich.

    2002 Audi S4 - Stage 2 (Imola)

  2. #2
    Active Member Two Rings
    Join Date
    Dec 28 2008
    AZ Member #
    36826
    Location
    NJ

    Re: TCM/TCU location

    Quote Originally Posted by audiluxary View Post
    This may be a dumb question but someone please tell me where the TCU is located. I know people have said under the passenger side floor board. Please be more specific as to where exactly it is. I pulled the right kick board off and I can't figure out how to pull the top kick board the one with the light in it down. I pulled my carpet up some and I still can't find the TCU container. Please help thanks.
    On the '98 it is under the carpet on the passenger side floor board. Using the door speaker as a reference move back approx 3 inches. Remove the plastic trim (door sill) that ones' feet pass over whenever a passenger enters the vehicle then pull up the carpet and push your hand under the carpet and back toward the the door sill is where you will find it

  3. #3
    Veteran Member Three Rings audiluxary's Avatar
    Join Date
    Nov 21 2007
    AZ Member #
    22745
    My Garage
    2001 Audi A4 1.8T/2002 S4 (Imola) stage 2
    Location
    The Sticks

    Re: TCM/TCU location

    Thanks man I found it now. I thought it was up more to where your feet rest, I didn't know it was way back thier. Thanks again. Now I have a question, does anyone know if these two TCU's are compatible with eachother.? The one on the left is the one that is in the car now and I was wondering if I can put the one on the right in with no problems. The only thing different on the TCU's are the last letter of the serial numbers.
    2001.5 1.8t


    GIAC FXK04 (Hammer) installed with a big fat cell...update, cell has been gone for a long time now but smells like it's running rich.

    2002 Audi S4 - Stage 2 (Imola)

  4. #4
    Veteran Member Three Rings audiluxary's Avatar
    Join Date
    Nov 21 2007
    AZ Member #
    22745
    My Garage
    2001 Audi A4 1.8T/2002 S4 (Imola) stage 2
    Location
    The Sticks

    Re: TCM/TCU location

    It works, they are compatable if anyone was wondering.
    2001.5 1.8t


    GIAC FXK04 (Hammer) installed with a big fat cell...update, cell has been gone for a long time now but smells like it's running rich.

    2002 Audi S4 - Stage 2 (Imola)

  5. #5
    Active Member Two Rings
    Join Date
    Dec 28 2008
    AZ Member #
    36826
    Location
    NJ

    Re: TCM/TCU location

    Quote Originally Posted by audiluxary View Post
    It works, they are compatable if anyone was wondering.
    glad you found it and that it works!!!

  6. #6
    Registered Member One Ring
    Join Date
    Mar 22 2012
    AZ Member #
    90428
    Location
    hermosa beach, ca

    I have a 2001 A4 1.8T quattro and need to replace the TCM. I need the part number and was wondering if the TCM's you have a picture of was for a 2001 also?



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