There is really nothing too crazy with the body structure of the 2013 Toyota Corolla. There is some Ultra-High Strength Steel in the A-Pillar (A-Post) and in the doors. Based on the picture below if you are making a relief cut or just cutting the A-Pillar for a roof removal if your older cutters stall out. Just move your tool high up the A-Pillar to get post the reinforcement. Always remember to pull away the interior trim pieces to check for stored gas inflators.