I have a 2017 QX50 and the lower trim piece on my front bumper is cracked. I found part 620645UA0A online to purchase. Does anyone know if this is easily replaced, or do you have to take apart the front bumper to remove/install the trim piece? I tried googling to see if I could find any videos showing how to replace it without any luck.

You don't have to take part much to replace it. There are just a bunch of screws holding it in place. The license plate frame may have to be removed first. None of this is difficult, just tedious.