I bought this part because the wand kept pulling out of the power nozzle, and replacing the button on the wand didn't fix it. It was pretty tough getting the plastic cover off the power nozzle, but aside from that it went pretty smoothly. Best of all, the problem is fixed and the wand doesn't pull out of the power nozzle any more.
Excellent part descriptions on this website made me confident I was ordering the correct part for my model.