Remove the reservoir cap and drain the brake fluid into a suitable container.
Remove the fluid level sensor.
Remove the reservoir from the master cylinder after mounting screw (A).

Remove the proportioning valves (A) - CBS only.

Remove the retainer ring by using the snap ring pliers then remove the primary piston assembly.

Remove the pin with the secondary piston pushed completely using a screwdriver. Remove the secondary piston assembly.-ABS/TCS/ESP

Do not disassemble the primary and secondary piston assembly.