o2 sensor question

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  • BBY1104
    • Nov 2025

    #1

    o2 sensor question

    I was wondering if the o2 sensor on an m42 is a 3 or 4-wire? I am also looking at getting one at a reasonable price. Any response is appreciated and if you know where to get them shoot me a link.

    thanks
  • Jak
    Member
    • Aug 2006
    • 62

    #2
    This is the cheapest Ive found. http://shop.carbodyparts.net/search....991&part_type=

    I just ordered the 4 wire for my car a couple days ago. It should be here tomorrow.

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    • BBY1104

      #3
      let me know how that goes and if so can you take a picture or to Do you just cut the old wires and splice it on to the existing screw cap on the air box?

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      • BBY1104

        #4
        progress?

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        • Jak
          Member
          • Aug 2006
          • 62

          #5
          Still haven't got it in yet but I took a picture of the Catco direct fit converter. Looks like a decent job to me.

          Last edited by Jak; 01-17-2008, 09:46 AM.

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          • Jak
            Member
            • Aug 2006
            • 62

            #6
            The catco direct fit was made wrong. I was able to use the O2 sensor but I'm going to have to send the cat back to the manufacturer.

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            • Jak
              Member
              • Aug 2006
              • 62

              #7
              Originally posted by BBY1104
              let me know how that goes and if so can you take a picture or to Do you just cut the old wires and splice it on to the existing screw cap on the air box?

              We soldered my wires together. It is a four wire but the plug does not go to the airbox. Its on a bracket about where the front battery tray is.

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              • BBY1104

                #8
                carbodyparts.net is your first and best source for all of the information you’re looking for. From general topics to more of what you would expect to find here, carbodyparts.net has it all. We hope you find what you are searching for!


                is this the one you used the generic 4 wire for 91-97 318is?

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