Completely power off and unplug your MacBook Pro before you start. Close the display and flip the entire laptop upside-down.

Use a P5 Pentalobe driver to remove six screws securing the lower case, of the following lengths:

Four 3.7 mm screws

Two 7.3 mm screws

Note how the screws come out at a slight angle—you must reinstall them the same way.

Throughout this repair, keep track of each screw and make sure it goes back exactly where it came from to avoid damaging your device.