Turn pedal effort into hydraulic brake pressure with the Dorman First Stop Brake Master Cylinder M39791. This new Pickup master cylinder is a direct-fit replacement for the 1986 and 1996-1997 Nissan Pickup, the 1986-1992 Nissan D21 and the 1987-1990 Nissan Pathfinder, all engines.
Dorman designed this unit to replicate the original master cylinder's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: The aluminum cylinder housing is built to match the original part's material for similar performance.
- Durable design: All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Made entirely from new materials for quality and safety.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: 0.938 in bore diameter; 3 outlets; M10 x 1.0 rearward and secondary outlet threads; 1 mm primary outlet thread pitch. The reservoir and sensor are included. Mounting hardware is not included. Country of origin: Taiwan.
A soft or sinking brake pedal, fluid leaking at the cylinder or reservoir, or a steadily dropping fluid level may mean the master cylinder needs replacing. Other brake components can cause similar symptoms, so diagnose the cause first. After installation, bleed the brake system as directed by the vehicle service information.
