Dorman - First Stop Brake Master Cylinder P/N:M631053
Keep hydraulic pressure reaching the brakes of your vintage Dodge or Plymouth with the Dorman - First Stop Brake Master Cylinder M544. It is a direct-fit replacement for many vehicles, among them the 1957-1959 Dodge D100 Pickup, 1957-1959 Dodge D200 Pickup and 1957-1959 Dodge D300 Pickup; see the Buyer's Guide tab for the full list. Dorman precision-engineers it to mirror the original master cylinder's design, function and performance on the listed applications, and builds it from new, high-quality materials for a safe, durable replacement.
The master cylinder turns the force from the brake pedal into hydraulic pressure that it sends through the brake lines to the wheel brakes. If a worn or leaking original is the cause of a soft or sinking pedal, this unit replaces it.
Specifications: 1.25 in bore diameter; 3 outlets; rearward outlet size 3/8-18 NPT; secondary outlet thread diameter 1/4-18 NPT and 1/8-27 NPT. The reservoir is included. Mounting hardware and a sensor are not included; consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: Taiwan.
Interchange: 100-2784 · 13-35126 · 10-40544 · 130.81004 · 355-40093
1002784 · 1335126 · 1040544 · 13081004 · 35540093 · M900000 · 1191397 · 1797432 · 695696 · MC511180 · 5461375 · MC544 · F544
This part cross-references / interchanges with the following part numbers:
Does the Dorman M544 master cylinder come with a reservoir?
Yes, the reservoir is included. Mounting hardware and a sensor are not included.
What is the M544 housing made of?
The cylinder housing is cast iron, built to match the casting material of the original part. The rubber components are an EPDM compound that resists glycol-based brake fluid.
What are the bore and outlet specifications?
It has a 1.25 in bore diameter and 3 outlets. The rearward outlet size is 3/8-18 NPT, and the secondary outlet thread diameter is 1/4-18 NPT and 1/8-27 NPT.
What are signs a brake master cylinder may need replacing?
A soft or sinking pedal, fluid leaking at the cylinder, or a falling fluid level may be signs. Other brake components can cause similar symptoms, so diagnose the cause before replacing.
Which vehicles does the M544 fit?
It fits many vintage Dodge and Plymouth models, including the 1957-1959 Dodge D100 Pickup and 1957-1959 Dodge D200 Pickup. See the Buyer's Guide tab for the full list.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.