HomeBrake > Brake HydraulicsDorman M71259 Brake Master Cylinder
Part #: M71259

Dorman M71259 Brake Master Cylinder

⚙️ 3 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Dodge, W300
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Reliable Brake Master Cylinder for Dodge W300

The Dorman M71259 brake master cylinder is designed specifically for Dodge W300 models, providing consistent hydraulic pressure for your braking system. Crafted from durable cast iron, this master cylinder includes a reservoir and features a 1.125-inch bore diameter to meet OEM specifications.

  • Master cylinder bore diameter: 1.125 inches
  • Constructed from cast iron for durability
  • Includes reservoir for fluid storage
  • Two outlets with secondary outlet thread diameter of 0.5 inches
  • Rearward outlet size: 9/16-18
  • Package contains the master cylinder only

Product Details and Specifications

The Dorman M71259 brake master cylinder is engineered to restore proper brake hydraulics in Dodge W300 vehicles. Its cast iron construction ensures long-lasting performance under demanding conditions. The included reservoir allows for efficient brake fluid management, while the 1.125-inch bore diameter matches the original equipment for reliable pressure delivery. Featuring two outlets, including a secondary outlet with a 0.5-inch thread diameter and a rearward outlet sized at 9/16-18, this master cylinder supports the brake system’s hydraulic flow requirements without the need for additional sensors or mounting hardware.

Compatible Applications and Common Uses

  • Replacement for worn or leaking brake master cylinders on Dodge W300
  • Restores proper brake pedal feel and hydraulic pressure
  • Addresses brake fluid reservoir leaks or damage
  • Solves issues related to inconsistent brake pressure or pedal sinking
  • Suitable for vehicles requiring a 1.125-inch bore diameter master cylinder

Installation Notes and Tips

When installing the Dorman M71259 brake master cylinder, ensure the brake fluid reservoir is properly filled and free of contaminants. Bleed the brake system thoroughly to remove air and verify hydraulic pressure. This part does not include mounting hardware, so retain or source the necessary components for secure installation. Verify compatibility with your Dodge W300 before installation to ensure proper fit and function.

Quality Assurance and Warranty

Dorman manufactures the M71259 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron material provides strength and resistance to wear. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.

BrandDorman
Part NumberM71259
Mounting Hardware IncludedNo
Master Cylinder Bore Diameter1.125
Master Cylinder MaterialCast iron
Reservoir IncludedYes
Secondary Outlet Thread Diameter0.5
Sensor IncludedNo
Number of Outlets2
Package ContentsMaster cylinder
Rearward Outlet Size9/16-18

This part fits 3 vehicles. Search below:

YearMakeModelPositionNotes
1977DodgeW300N/A1.125" bore compatible with manual brakes.
1976DodgeW300N/A1.125" bore compatible with manual brakes.
1975DodgeW300N/A1.125" bore compatible with manual brakes.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

10-14051140513-1405130.6700118M152536258283025154715287125983-40001F71259M-87001M900106MC512070NM1405

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.