1. We need to remove the front bumper, so turn your steering wheel all the way to one side and remove the three plastic pop rivets at the lower portion of the fender splash guard.
2. There is another plastic pop rivet located just beside the sidemarker that needs to be removed.
3. The sidemarker itself needs to come out. Pull the inner fender liner away and try your hardest to poke a screwdriver into one of the holes on the back of the sidemarker and pry. Even after I got it out I am still confused as to why Subaru did it this way. Even the owners manual is very vague and the instructions make no sense. Good luck.
4. OK, now that you (hopefully) have the sidemarker out, there is a plastic pop rivet located directly above where it was mounted. This fixes the corner of the bumper to the bottom of the fender, so it needs to come out.
5. There are three pop rivets centered under the front bumper. Remove them.
6. There are two 10mm bolts under there as well, one on each side. Out they go.
7. Two more plastic pop rivets attach the bumper to the splash guards at each corner of the car. All four of those need to be removed.
8. Now up top there are five 10mm bolts and a couple more pop rivets. Once you remove those the entire flat metal bar that holds the top of the bumper on will lift off.
9. To remove the bumper, firmly pull out on each corner and it will pop off.
Thanks to DarrenDriven