I replaced my A and C pillars yesterday. The A pillars are straight forward as documented in this DIY. The C pillars I had no torx bolt to undo, and the clips didn't break, so I used the spares I had to install ( 2 per side). Be sure you clip the top pieces into the body sockets and ensure the bottom rear protusion piece lines up in the hole for it. Also, the replacement C pillars didn't come with a black rubber buffer piece, so I just transferred it from the old ones to the new ones. Still had enough stick left on it that it was easy to do.