Keep firm, reliable pedal pressure to both brake circuits with the Dorman - First Stop Brake Master Cylinder M631038. It drops in as a direct-fit replacement for the 2015-2024 Ford Transit, 2022-2024 Ford E-Transit, 2017 Ford Transit Custom, and the 2019-2024 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD. The master cylinder converts pedal force into the hydraulic pressure that operates the brakes, so this unit is precision-engineered to match the design, function, and performance of the original on the listed applications.
- Precise replacement: the aluminum cylinder housing is built to match the casting material of the original part for similar performance, with a 1.125 in bore and two M14 x 1.5 outlets.
- Durable design: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely of new materials, not remanufactured, and built to meet rigorous SAE International standards.
Includes the reservoir, master cylinder cap, and sensor. Two mounting holes. Mounting hardware, mounting bracket, push rod, bleeder hoses, and brake booster are not included. Country of origin: China.
Interchange: 100-3970 · 130.65144
1003970 · 13065144 · CK4Z2140A · CK4Z2140B · NM4295
This part cross-references / interchanges with the following part numbers:
100-3970, 130.65144, CK4Z2140A, CK4Z2140B, NM4295, MC391513
