The killer is buying sensors from a scrap yard from and old Trooper. If the scrapper tries to get out the sensor, he may kill it. My scrapper gave up and just sent the whole hub. I got 4 fronts and one came out alive. The rubber body fuses to the hub steel. Right and left are the same. Only the metal wire guide is different. You can swap yourself. Two fronts, Right and left, should cost about $50.00.
I don't know why the mechs kill the sensor with axle removal, but mine did it, also.
Roy