Dorman - First Stop Brake Master Cylinder P/N:M630944

Convert brake-pedal force into the hydraulic pressure your brake circuits need with the Dorman - First Stop Brake Master Cylinder (M630944). It drops in as a direct-fit replacement for the 2014-2024 RAM ProMaster 1500, 2500 and 3500 (All) and the 2017 RAM ProMaster Rapid (All), and is engineered to reproduce the design, function and performance of the original master cylinder on those applications.

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

This master cylinder pressurizes brake fluid and delivers it through two outlets to the brake circuits. It has a 1.0625 in bore, a single reservoir and a sensor, with a secondary/rearward outlet thread of M12 x 1.0 and a 1 mm primary outlet thread pitch. If a failing master cylinder is the cause of a sinking or spongy pedal or internal fluid bypass, this replaces it; diagnose the cause before replacing. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.

Interchange: 100-4316 · 1004316 · 130.67055 · 13067055 · 68211341AA · 355-39030 · 35539030 · NM4321
Manufacturer part number M630944.