I am guessing it is the same as my 2010. I put in Husky Floor Liners and just grabbed the long part of the hook and pulled it up. It unsnapped with no damage. Bill
I would humbly suggest keeping the hook installed, and buying a floor mat or liner that utilizes it's existence. But if you are dedicated to its removal? A few sticks of dynamite should do it.
I got them removed, basically had to break the retaining underside clip. There was no way I could get to the small clips that hold the white underside piece. On the Prius lift back, they just snapped out, but they were the hook type. I needed to take them out so that I could put some silicone in the mat holes; the snow/water was leaking through and making a mess of the rug. Done.
Sorry I haven't been around for a while. One doesn't need to remove anything for the Husky Liners to fit. They fit right over the "hooks" in a certain orientation.
I ordered the Husky Weatherbeaters last night. I see that they have recesses for the twist retainers....oh well. I guess I can try to get new retainers. I just don't understand that stupid cutout design. I have since put duct tape there to extend the wall and to hold over until the Husky's get here Friday. I wonder if all Weathertech liners have that design if there is a gas cap release there? The passenger side liner without the cutout works just fine. Done with Weathertech,used them in the last 5 vehicles. I hope the tape mod holds until Fri.