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crank_cam_sensors.md

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BMW M70 cam and crank sensors

Crank sensor

  • BMW Number: 12141720291
  • Plug:
    • Housing: 12521732596
    • Pin: 12521737772 0.5 - 1.0mm², 12521737773 1 - 2.5mm² (MDK4 2.8)
    • Cap: 12521732635
  • Type: inductive sensor, 550Ohm, 3 pin
  • offset between reference mark and first trigger event (TS: Trigger Angle Advance): 84° BTDC https://youtu.be/39ksFd4Hx90?t=731

Cam sensor

  • BMW Number: 12147539165
  • Plug:
    • Housing: 12521732596
    • Pin: 12521737772 0.5 - 1.0mm², 12521737773 1 - 2.5mm² (MDK4 2.8)
    • Cap: 12521732635
  • Type: hall sensor, 3 pin
  • because of wasted spark, this sensor is not needed / used yet
  • for the future is planed to use an BMW M54 hall cam sensor