Clearance Adjustment

WARNING: This page is about a different car, the 2015 Subaru Outback and 2015 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Loosen the lock nut, and adjust the stop light switch position until the clearance (A) between the threaded end of the stop light switch and stopper becomes 1.1 mm (0.04 in). Then, tighten the lock nut.
Tightening torque:

8 N.m (0.8 kgf-m, 5.9 ft-lb)
Tighten the lock nut.

Fig 1: Identifying Stop Light Switch Threaded End And Stopper Clearance
Courtesy of SUBARU OF AMERICA, INC.