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    02 heater wire

    What does that heater wire do? how necessary is it? (4 wire 02 sensor version)
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    #2
    The sensor has to be at a certain tempature to work effectively, the heater wire heats the sensor up when you first start the car, so the ecu gets a better signle from the sensor, vesus waiting for the exhuast gases to heat it up.
    85 325e 2.7 ITB'd stroker

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      #3
      oooooh i see, so the heater wire is going TO the oxygen sensor,, not FROM the oxygen sensor...
      Recent Rebranding!!
      Visit Garageaholic for all of your E30 Swap Needs!
      E30 SM62/S62
      E30 M60 V8
      E30 M30 Big 6!




      Check out this E36 N54 Swap Build
      Instagram.com/garageaholic
      Youtube.com/garageaholic

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        #4
        correct, it goes from the o2 heater relay to the sensor.
        85 325e 2.7 ITB'd stroker

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