Dorman - First Stop Brake Master Cylinder P/N:M39653

Turn pedal effort into the hydraulic pressure your brakes rely on with the Dorman First Stop Brake Master Cylinder M39653. It is a direct-fit brake master cylinder for the 1986-1989 Honda Accord, 1985-1987 Honda Prelude and 1986-1989 Acura Integra, all engines. Dorman precision-engineers it to match the design, function and performance of the original master cylinder on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.

• Precise replacement: the aluminum cylinder housing is made to match the original part's material 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: made entirely from new materials for quality and safety.
• Strict specifications: made to meet rigorous SAE International standards.

Specifications: 0.875 in bore diameter; 2 outlets; secondary and rearward outlet threads M10 x 1.0; primary outlet thread pitch 1 mm. The reservoir and sensor are included. Mounting hardware is not included. Country of origin: China.

The master cylinder converts brake-pedal force into hydraulic pressure that is sent through the brake lines. Signs it may need replacing include a soft or sinking pedal, fluid leaking at the cylinder, or a dropping reservoir level. If the master cylinder is the cause, this unit replaces it. Diagnose the problem before replacing parts, and bleed the brake system as directed by the vehicle service procedure after installation.