Which crank position sensor?

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  • justin_l_
    E30 Enthusiast
    • Jun 2007
    • 1079

    #1

    Which crank position sensor?

    I have two crank position sensors and brackets, does it matter which one I use? They are both 3 wire plugs and the same style plug, but the sensors are a little different in size.
  • SlapDash
    Mod Crazy
    • Jan 2009
    • 675

    #2
    Use the one that most resembles what you take off. The top, to me, looks like the 6-cyl. version. Not sure which engine you have.
    www.slapdashracing.com

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    • MR 325
      Moderator
      • Oct 2003
      • 37825

      #3
      Reference the part number on Google or something and see which one is right. ;)
      BimmerHeads
      Classic BMW Specialists
      Santa Clarita, CA

      www.BimmerHeads.com

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      • wildstoats
        E30 Modder
        • Sep 2007
        • 896

        #4
        The bottom sensor looks more like a B34 diagnostic sensor to me. Just judging by the bracket and the shape.
        $500, Diamantschwarz, and a Dream

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        • 1987E30project
          E30 Addict
          • Dec 2006
          • 432

          #5
          Top one

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          • justin_l_
            E30 Enthusiast
            • Jun 2007
            • 1079

            #6
            They are both CPS. The brackets are different. The top is off a euro m30b35 and the bottom is off a US m30b35. I am using the top one with the bracket off the bottom one and a washer to space it properly for the harmonic balancer

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