Removing forward underbody panel

Raise front of car, either by driving onto ramps or by jacking it up.

Unbolt seven 10mm bolts at the front and one 10mm bolt at the back.
A cordless screwdriver really speeds up this step; you’ll need the appropriate adapter to out a socket on the screwdriver:

Remove six plastic anchor plugs: pry up the “head” of the plug and pull it out.
Forward underbody panel, fasteners; note that the two forward, outside, bolts are shorter and do not have Phillips head: