Built to turn pedal effort into hydraulic braking pressure, the Dorman First Stop Brake Master Cylinder M390257 is a brand-new unit designed to match the original master cylinder's design, function and performance. It fits many vehicles, among them the 1994-1999 Chevrolet C1500, 1994-1999 Chevrolet K1500 and 1997 Dodge Ram 1500. See the "Vehicles it fits" section for the full list.
Dorman makes this master cylinder from new, high-quality materials so it can serve as a safe, durable replacement. It feeds hydraulic pressure through two outlets to the brake lines, and it comes with its reservoir already included.
- Precise replacement: the aluminum cylinder housing is made to match the material of the original part for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: built entirely from new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
- Specs: 1.25-inch bore, two outlets and a 1/2-20 rearward outlet. A sensor and mounting hardware are not included.
A soft or sinking pedal, or fluid seeping from the master cylinder, are signs this part may need replacing. If a failed master cylinder is the cause, this unit replaces it. Diagnose the brake system first, then follow the vehicle service procedure, including bleeding the brakes. Country of origin: China.
Interchange: 174-722 · 783-44030 · 83-44030 · 100-2616 · M-86030 · 13-2684 · 10-2684 · 130.66030 · 131.66030 · 355-47159
174722 · 78344030 · 8344030 · 1002616 · M86030 · 132684 · 102684 · 13066030 · 13166030 · 35547159 · 18M712 · M900950 · 13056 · 4778453 · MC131472 · 18021275 · 18029968 · M3011 · NM3011 · MC390257 · F131472
This part cross-references / interchanges with the following part numbers:
174-722, 18M712, 783-44030, 83-44030, M900950, 100-2616, M-86030, 13056, 13-2684, 10-2684, 130.66030, 131.66030, 4778453, MC131472, 355-47159, 18021275, 18029968, M3011, NM3011, MC390257, F131472
Frequently Asked Questions
Is this the right 1997 Dodge Ram 1500 master cylinder for my truck?
M390257 is listed for the 1997 Dodge Ram 1500. Check the "Vehicles it fits" section for the complete list of vehicles it fits.
Is this the right 1994-1999 Chevrolet K1500 master cylinder?
It is listed for the 1994-1999 Chevrolet K1500 and the 1994-1999 Chevrolet C1500. The "Vehicles it fits" section shows every listed application.
What comes in the box?
You get the master cylinder with its reservoir included. A sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners.
What are the key specs of M390257?
It has an aluminum housing, a 1.25-inch bore, two outlets and a 1/2-20 rearward outlet. Its rubber components use an EPDM compound that resists glycol-based brake fluid.
What are signs a master cylinder may need replacing?
A soft or sinking brake pedal, fluid leaking at the master cylinder, or a dropping fluid level can be signs. Other brake faults cause these too, so diagnose the system before replacing the part.
