Dorman - First Stop Brake Master Cylinder P/N:M39976

Convert brake-pedal effort into the hydraulic pressure that operates the braking system with the Dorman First Stop Brake Master Cylinder (M39976). It drops in as a direct-fit replacement for the 1991-1994 Nissan D21, 1991-1995 Nissan Pathfinder, and 1995 Nissan Pickup (All engines), engineered to match the design, function, and performance of the original unit.

• Aluminum housing: the cylinder housing is constructed to match the casting material of the original part, with a 1 in bore and three outlets.
• EPDM seals: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
• 100% new: built entirely from new materials, not remanufactured.
• SAE spec: made to meet rigorous SAE International standards.

The reservoir and a sensor are included; mounting hardware is not, so consult the vehicle service information for the correct fasteners and whether they may be reused. The rearward and secondary outlets use an M10 x 1.0 thread. Signs the original master cylinder may need replacing include a brake pedal that slowly sinks to the floor, a soft or spongy pedal, or fluid loss with no visible external leak — diagnose the cause before replacing. Country of origin: Taiwan.

Manufacturer part number M39976.