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CSL Airbox MAP sensor wiring inquiry

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    #16
    Originally posted by bavarian3 View Post
    Updated the post with a diagram. Hope this helps others that find this thread.
    Nice one! Looks great!


    Sent from my iPhone using Tapatalk
    2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
    Build Thread:
    https://nam3forum.com/forums/forum/m...e46-m3-journal

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      #17
      Is 18 gauge wire satisfactory for constructing this harness?
      Old, not obsolete.

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        #18
        Originally posted by D-O View Post
        Is 18 gauge wire satisfactory for constructing this harness?
        More than enough.
        Try to use TXL instead of GXL or SXL.

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          #19
          Originally posted by Bebop View Post

          More than enough.
          Try to use TXL instead of GXL or SXL.
          Thanks.

          I have enough 18g TXL left from my electric fan project to get this done.

          Mostly I was concerned with it being sized correctly for the OE connectors. A little googling indicates the connectors accommodate wire with a cross section of between 0.5mm and 1.0 mm. 18g falls right in there. I was just too lazy to look for myself and figured the hive mind would know.
          Last edited by D-O; 08-20-2025, 10:30 AM. Reason: more info
          Old, not obsolete.

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            #20
            Complete derail, but you wired a fan with 18AWG? Bit small ain't it?

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              #21
              Originally posted by Bebop View Post
              Complete derail, but you wired a fan with 18AWG? Bit small ain't it?
              Fair question. The 18g was for the fan controller. For the fan itself I used 10g.
              Old, not obsolete.

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                #22
                Originally posted by Epsilon View Post
                I sent a note to the folks at: https://auto3design.co.uk/online-sho...onversion-kits

                They noted the following:



                Reach out to them if there's interest.



                FYI, I contacted Auto3Design recently as well and they are going to build and sell a harness based on the diagram in this thread. I asked them to size it for an air rail mounted MAP sensor. The link should be available this weekend, and the harnesses should be ready next week. Will be interested to see how it looks. . . . I'll likely give it a try as I gather parts for an airbox install.

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                  #23
                  Originally posted by Big Nodge View Post

                  FYI, I contacted Auto3Design recently as well and they are going to build and sell a harness based on the diagram in this thread. I asked them to size it for an air rail mounted MAP sensor. The link should be available this weekend, and the harnesses should be ready next week. Will be interested to see how it looks. . . . I'll likely give it a try as I gather parts for an airbox install.
                  Hey turns out my illustration was good for something! glad to see this move forward. Post up when you have it so I can see how they handle the fit and finish.
                  🔹 2001 M3 Laguna Seca Blue
                  Build thread: link

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                    #24
                    Will do! And great work again to you and karter figuring this out. I told them I bet they’ll sell a lot of these because this seems like the new go-to solution for a CSL airbox install with MAP.

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