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      12-17-2019, 09:53 AM   #2
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Drives: 2011 335d Sport
Join Date: Jun 2017
Location: Austin, Texas

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Double check me on this, but I don't believe they are interchangeable. The wiring diagrams on show that on the N57 there is an interim connector (X2335) between the glow plug module and the DDE which is not present on the M57 wiring. This explains why you are able to find the N57 harness as a separate part -- it can be separated from the complete engine loom, it appears that the M57 harness cannot.

What do you need an N57 glow plus harness for anyway? Break the tabs on the big 12-pin connector?
BRR Tuned