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Dorman - First Stop Brake Master Cylinder P/N:M390257
$89.99
Convert brake-pedal pressure into the hydraulic force that operates the brakes with the Dorman - First Stop Brake Master Cylinder M390257. It's precision-engineered to match the design, function, and performance of the original master cylinder, dropping in on the listed applications — including the 1994 Chevrolet Blazer, 1994-1999 Chevrolet/GMC C1500 and K1500, 1994-2000 Chevrolet/GMC C2500, K2500 and GMC Yukon, 1995-2000 Chevrolet Tahoe, 1997 Dodge Ram 1500, and 1995-1997 Dodge Ram 2500. See the Buyer's Guide tab for the full list of applications (all engines).
- 100% new: made entirely of new materials, not remanufactured.
- Aluminum housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
- Durable design: all rubber components are made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Built to spec: made to meet rigorous SAE International standards.
This unit has a 1.25 in bore, two outlets with a 1/2-20 rearward outlet size, and includes the reservoir. Mounting hardware is not included and no sensor is supplied; consult the vehicle service information for the correct fasteners and whether they may be reused. If a failed master cylinder is the cause of a low or sinking pedal, this replaces it. Country of origin: China.
Interchange: 174-722 · 174722 · 18M712 · 783-44030 · 78344030 · 83-44030 · 8344030 · M900950 · 100-2616 · 1002616 · M-86030 · M86030 · 13056 · 13-2684 · 132684 · 10-2684 · 102684 · 130.66030 · 131.66030 · 4778453 · MC131472 · 355-47159 · 35547159 · 18021275 · 18029968 · M3011 · NM3011 · MC390257 · F131472. Manufacturer part number M390257.
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
What does a brake master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that is sent through the brake lines to operate the brakes at each wheel.
Does this master cylinder include a reservoir?
Yes. The reservoir is included. The package contains the master cylinder; a sensor and mounting hardware are not included.
What are the key specs?
It has a 1.25 in bore diameter, an aluminum housing, two outlets, and a 1/2-20 rearward outlet size.
Will this fit my vehicle?
It's cataloged for applications like the 1994-1999 Chevrolet/GMC C1500 and K1500 and 1995-2000 Chevrolet Tahoe (all engines). Check the Buyer's Guide tab for the full list.
What are signs the master cylinder may need replacing?
A pedal that feels soft, sinks slowly to the floor, or fluid loss with no visible external leak can be signs. Diagnose the cause before replacing, as other components can produce similar symptoms.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M390257
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