You need to remove the rear fascia, disconnect the sensor harness, remove the sensor from the sensor housing, sand/grind sonic weld plastic residue from the fascia and apply structural adhesive epoxy, Lord Fusor (TM) 127EZ or equivalent, to fascia at the mating surface. Then you can install the sensor housing to the fascia, allow the adhesive to cure according to the manufacturer's directions, the sensor to the sensor housing, connect the electrical harness, and install the rear fascia.
By BobGM Specialist
02/11/2022