Subaru LEGACY 2002 Quick Reference Index page 424

Brakes
2. Master Cylinder
! There is a brake fluid reservoir tank on the master cylinder. The reservoir is completely sealed
for extended service life of the brake fluid.
ABS model
(1) Reservoir tank
(2) Secondary hydraulic chamber (chamber S)
(3) Primary hydraulic chamber (chamber P)
MASTER CYLINDER
BR-4
B4H1934C