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Brake Booster

WARNING: This page is about a different car, the 2023 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Brake Booster Components Location
G16387108Courtesy of SUBARU OF AMERICA, INC.
(1) Adapter cord booster
(2) Electric booster ASSY
(3) Gasket A
(4) Stopper electric booster
(5) Gasket B

Tightening torque: N.m (kgf-m, ft-lb) 

T: 18 (1.8, 13.3)