Open the trunk lid, and remove the rear license trim.

Remove the trunk lid trim panel.

Disconnect the connector (A) from the inner taillight (B).

Remove the nuts, then remove the inner taillight.

Inspect the gasket; replace it if it is distorted or stays compressed.

Install the inner taillight in the reverse order of removal, and tighten the nuts to 5 N·m (0.5 kgf·m, 4 lbf·ft).