This is a slightly used O2 sensor with 4 prongs, actually it was on my vehicle for 23 days.  My vehicle problem was not the sensor but a cracked procelain on a plug.  The part number of this sensor is 13104 and new it is approximately $95, you can check that out at O'Reillys or even Auto Zone, they are close the same price.  If interested call 785-658-3687 and leave message I will get back to you or contact me through this site.  Could bring to the Great Bend or Salina area.  Make an Offer