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Andrew's DIY Guide for S54 Wiring Adapter Harnesses

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    Are you still offering these harnesses?

    Messaged you and sent you an e-mail but haven't heard back.
    16 GT3RS
    16 GT4
    05 M3
    88 M3
    90 Mtech Touring
    89 Touring
    91 325i

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      Email sent.

      I was up above it, Now I'm down in it ~ Entropy - A Build thread.
      @Zakspeed_US

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        Yes, I'm still making them. I was away for the weekend.
        Plug and Play Wiring Harness Adapters for S54, S50, M54 and more.

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          What is the turn around time for s54 harness in 91 e30 3.
          Thanks.

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            Originally posted by robbmw View Post
            What is the turn around time for s54 harness in 91 e30 3.
            Thanks.
            Email replied.
            Plug and Play Wiring Harness Adapters for S54, S50, M54 and more.

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              New lower price for M52TU wiring adapter harness. :)
              Plug and Play Wiring Harness Adapters for S54, S50, M54 and more.

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                Sent PM :)
                Euro Delivery Thread///E30 Project Klaus///COTM August 2021

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                  Sent payment!
                  Euro Delivery Thread///E30 Project Klaus///COTM August 2021

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                    What is the turn around time for S54 harness in 98 e36? I also have questions on how this works with the stock harness. I have both a E46 M3 and Z3M harness, which is perferred?

                    Thanks

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                      Originally posted by cjsf3 View Post
                      What is the turn around time for S54 harness in 98 e36? I also have questions on how this works with the stock harness. I have both a E46 M3 and Z3M harness, which is perferred?

                      Thanks
                      I did the swap in a 95 M3, so my harness would be only slightly different from yours.

                      Use the Z3M S54 harness, as it routes the harness closer to the stock ECU tray. Depending on the year your engine is from though, you may need to convert to the earlier air rail-- the Z3M harness does not have connectors for the large check valve on top of the air rail.

                      Andrew's harness worked like a charm. One connector is NLA so we had to cut and re-pin one plug (I forget which) from the Z3M harness to match, but it wasn't anything more than a few minutes of effort.

                      You will still need transmission harness and O2/ignition coil harnesses, which should have come with the engine.
                      2017 Chevrolet SS, 6MT
                      95 M3/2/5 (S54 and Mk60 DSC, CARB legal, Build Thread)
                      98 M3/4/5 (stock)

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                        Thanks Bimmerman325i! The queue is pretty long right now so turnaround time is 2-3 weeks. I'm doing my best to fulfill orders as soon as possible.
                        Plug and Play Wiring Harness Adapters for S54, S50, M54 and more.

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                          2-3 weeks is quite acceptable IMO as engine swaps take quite a long time anyway. Looking forward for mine too!

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                            Pm sent, thanks Andrew

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                              Thanks bimmerman, I appreciate it.

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                                Added a photo of my M52TU adapter harness for E30 to the original post. :)
                                Plug and Play Wiring Harness Adapters for S54, S50, M54 and more.

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