Install the rear spoiler by striking waterproof rivets of diameter 4 mm through an air or hand riveter with a nose piece into the body panel to secure the 2 rear spoiler clips No. 1 on the back door panel. Position the rivets perpendicular to prevent mandrel bending during installation. Use two bolts to mount the center stop light assembly by torquing them to 2.5 Nm (25 kgf-cm, 22 in-lbf). Connect the center stop light connector followed by installing the spoiler through 2 bolts attached to 2 grommets while tightening them to 7.0 Nm (71 kgf-cm, 62 in-lbf).