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Thread: S50B30 Vs S50b32 Wiring Harness, what are the differences?

  1. #1
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    S50B30 Vs S50b32 Wiring Harness, what are the differences?

    Hello everyone, i need a bit of help.
    I am currently working on another euro swap here in the US this time with a S50B30. I want to know what is the difference between the b30 wiring harness and b32? I have a spare LHD harness from my b32 and wondering if that could be salvaged to use on the b30. i do have a proper b30 dme coming as we speak.

    From what i can find they have different part numbers

    S50b30
    https://www.ecstuning.com/b-genuine-...s/12511401275/

    S50b32
    https://www.ecstuning.com/b-genuine-...s/12511406121/

    Any help would be appreciated,
    Thanks!
    Instagram: @Tommy604604
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    1998 E38 750iL
    1999 E36 M3 Techno Vert
    1997 E36 M3 S50B32

  2. #2
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    Could probably contact Alex L. xyobgyn@aol.com pretty much one of the most knowledgeable guy on the "euro" or rest of the world motors.

  3. #3
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    Quote Originally Posted by tofunin View Post
    Could probably contact Alex L. xyobgyn@aol.com pretty much one of the most knowledgeable guy on the "euro" or rest of the world motors.
    Thanks for the reference! He pointed me in the right direction and i managed to source the correct harness.
    should anyone come across the same question the two harnesses are very different, the s50b30 harness has a second dme(VNC) for the vanos along with the main DME.
    Last edited by Tommy604604; 08-09-2018 at 02:35 PM.
    Instagram: @Tommy604604
    Rare Wheel Fanatic

    1998 E38 750iL
    1999 E36 M3 Techno Vert
    1997 E36 M3 S50B32

  4. #4
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    The B30 also has a TDC sensor (on the vanos bridge) the B32 hasn’t.

    And for the B32 there is the SMG version, where there is a separate control unit for the SMG and the extra wiring going to the shift solenoids, pumpmotor, pressure sensor.

    And of course the wiring for the 2 extra vanos solenoids for the exhaust side.
    1998 BMW M3 3.2 Cabrio • Alpinweiί III on Schwarz • German spec • 1 of 12
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  5. #5
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    The 3 liter S50 harness has a separate VANOS connector. On the 3.2 liter the VANOS is built into the main ECU so it has only one connector. Coils and injector connectors are all the same otherwise.

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