Help your brakes build the hydraulic pressure they rely on with the Dorman First Stop Brake Master Cylinder M39600, a new 1984-1986 Nissan 300ZX master cylinder and direct-fit replacement for the 1984-1988 Nissan 200SX. The master cylinder turns brake pedal force into hydraulic pressure and sends it through the brake lines. This unit is precision-engineered to match the design, function and performance of the original master cylinder, and it is made from new, high-quality materials.
- Precise replacement: The cylinder housing is built to match the casting material of the original part and is designed for similar performance.
- Durable design: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: The unit is made entirely of new materials.
- Strict specifications: It is made to meet SAE International standards.
Specifications: The master cylinder is aluminum, with a 0.938-inch bore and three outlets. The rearward and secondary outlets use M10 x 1.0 threads, and the primary outlet has a 1 mm thread pitch. The reservoir and sensor are included, and mounting hardware is not included. Package contents: one master cylinder. Country of origin: Taiwan.
Signs that a master cylinder may need replacing include a spongy or sinking brake pedal, fluid leaks at the cylinder, or a falling reservoir level. Other brake faults can cause similar symptoms, so diagnose the cause before replacing. Follow the vehicle service procedure for installation and brake bleeding.
See the "Vehicles it fits" section for every listed vehicle.
Frequently Asked Questions
Does this master cylinder come with a reservoir?
Yes. The M39600 includes the reservoir and a sensor. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused.
Which vehicles does the Dorman M39600 fit?
It is listed for the 1984-1988 Nissan 200SX and the 1984-1986 Nissan 300ZX, all engines, with one master cylinder per vehicle.
What are signs a brake master cylinder may need replacing?
Common signs include a spongy or sinking brake pedal, fluid leaking at the cylinder, or a dropping reservoir level. Other brake faults can cause similar symptoms, so diagnose the cause before replacing.
What brake fluid are the rubber components designed to resist?
All rubber components are made of EPDM compound for resistance to glycol-based brake fluid. Use the brake fluid type specified in your vehicle's service information.
What are the key specifications of the M39600?
It is made of aluminum, with a 0.938-inch bore and three outlets. The rearward and secondary outlets are M10 x 1.0, and the primary outlet has a 1 mm thread pitch. Country of origin: Taiwan.
