My friend sent me the instructions on how to take these out easily without taking apart the whole side well and arches. I'll explain what he says in case it is hard to read for any of you. Basically, you ONLY need to unclip HALF of the flare/wheel arch - the front portion - in order for it to release the amber reflector.
There are 3 (8mm) bolts that need to be removed. Use a wrench or socket wrench.
There are 2 plastic rivets (1 above the 3 bolts and 1 below them) that must be removed.
Within each plastic rivet, there is a tiny circle that you can push in with a small screw driver. This will make removing it easier.
You must push these two flare clips forward away from you.
Then, you must firmly pull the front part of the flare (wheel arch) away from the vehicle's body.
After the flare (wheel arch) has been removed, from the inside, push the reflector OUTWARD (away from the vehicle) and UP in order for it to release from the bumper.
