Dorman - First Stop Brake Master Cylinder P/N:M631027

Turn brake-pedal force into the hydraulic pressure your brakes rely on with the Dorman First Stop Brake Master Cylinder M631027. It installs as a direct-fit replacement for the 2010-2016 Cadillac SRX [All], engineered to match the design, function, and performance of the original master cylinder on the listed application.

• 100% new: built entirely from new materials, not remanufactured.
• Aluminum housing: constructed to match the casting material of the original part for similar performance.
• Durable rubber: EPDM components resist glycol-based brake fluid.
• Strict specifications: made to meet rigorous SAE International standards.

This unit has a 1.063 in bore and a single reservoir, and it ships with the reservoir, master cylinder cap, and a sensor. It uses two outlets with M12 x 1.0 secondary/rearward outlet threads and two mounting holes. A push rod, mounting bracket, mounting hardware, brake booster, and bleeder hoses are not included; consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.

Signs the original master cylinder may need replacing include a sinking or spongy pedal and brake-fluid leaks; if a failed master cylinder is the cause, this replaces it.

Interchange: 100-4045 · 1004045 · 10-4342 · 104342 · 130.62171 · 20819270 · NM4303 · MC146051 · Manufacturer part number M631027