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Aux cable doesn’t work

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    Aux cable doesn’t work

    I have an ‘04 M3 with navigation. I installed aux before so makes sense that I know it has aux. Recently the radio module/unit in the trunk gave out so I replaced it with a different one that ended up not working. Replacement for the replacement came and radio worked again but the aux option no longer came up. Bought a genuine aux cable since the previous one was eBay thinking it gave out but the issue persists. I’ve checked all fuses, did battery reset and nothing worked. Anyone have any tips to make it work again or what I haven’t checked yet?

    #2
    Originally posted by erickhoyos View Post
    I have an ‘04 M3 with navigation. I installed aux before so makes sense that I know it has aux. Recently the radio module/unit in the trunk gave out so I replaced it with a different one that ended up not working. Replacement for the replacement came and radio worked again but the aux option no longer came up. Bought a genuine aux cable since the previous one was eBay thinking it gave out but the issue persists. I’ve checked all fuses, did battery reset and nothing worked. Anyone have any tips to make it work again or what I haven’t checked yet?
    Check if it’s loose at the back of the radio

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      #3
      Originally posted by SteelGreyM View Post

      Check if it’s loose at the back of the radio
      I already tried unplugging the main wire harness and the little cable on top. Doesn’t do anything.

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        #4
        Originally posted by erickhoyos View Post
        I have an ‘04 M3 with navigation. I installed aux before so makes sense that I know it has aux. Recently the radio module/unit in the trunk gave out so I replaced it with a different one that ended up not working. Replacement for the replacement came and radio worked again but the aux option no longer came up. Bought a genuine aux cable since the previous one was eBay thinking it gave out but the issue persists. I’ve checked all fuses, did battery reset and nothing worked. Anyone have any tips to make it work again or what I haven’t checked yet?
        The radio module is probably the culprit. If you bought a replacement that comes from an earlier model (2002 and earlier??) then i believe it doesnt have the aux support.
        I was told this by a professional while trying to replace mine a few months back

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          #5
          Originally posted by yhp2009 View Post

          The radio module is probably the culprit. If you bought a replacement that comes from an earlier model (2002 and earlier??) then i believe it doesnt have the aux support.
          I was told this by a professional while trying to replace mine a few months back
          September 2002 and earlier

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            #6
            Originally posted by yhp2009 View Post

            The radio module is probably the culprit. If you bought a replacement that comes from an earlier model (2002 and earlier??) then i believe it doesnt have the aux support.
            I was told this by a professional while trying to replace mine a few months back
            Damn, I kinda figured that would be the case. I’ll have to check tomorrow.

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              #7
              Yea its one of those problems you dont anticipate. Just buy one on ebay using the part number from your original

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                #8
                The BM53 in my car supports AUX, while the one on my bench does not because of the HW revision. You can always get an AUX input through the CD Changer input (https://quidzel.com/aux/) or you can go wild and buy (one of my shamelessly plugged) BlueBus (https://www.bluebus.dev/) units

                -Ted

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