MPA Electrical NM1373 Brake Master Cylinder

Brake Master Cylinder for Front Drum Brake Applications

MPA Electrical NM1373 is a new standard replacement brake master cylinder built for vehicles with front drum brakes. It uses an integral reservoir, a 1-inch bore, and a cast iron body to restore hydraulic braking performance with a direct OE-style layout.

Engineered from OE sample data and tested to strict specifications, this brake master cylinder is a practical replacement for drivers servicing brake hydraulics on select vehicle applications. It is supplied with a reservoir and cap, and it uses DOT 3 brake fluid.

Key Features

• Brand: MPA Electrical
• Part number: NM1373
• Brake master cylinder for front drum brake setups
• Standard replacement grade
• Integral reservoir design
• Cast iron master cylinder body
• 1-inch master cylinder bore diameter
• Reservoir and cap included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.430-inch mounting hole diameter

Product Details

MPA Electrical NM1373 is built to restore brake pedal response and hydraulic pressure in vehicles that use a front drum brake configuration. The cast iron construction supports durability, while the integral reservoir helps simplify the hydraulic layout. This unit is a direct brake hydraulics replacement for applications that require a 1-inch bore master cylinder and a standard replacement design. This part cross-references Monroe Shocks & Struts (e.g., 2622923, 3205766) for the same application.

What This Part Helps Address

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Loss of hydraulic pressure in the brake system
• Brake fluid seepage around the master cylinder
• Worn or failing original brake master cylinder components

Installation Notes

Verify bore size, mounting hole spacing, reservoir style, and brake system configuration before installation. This master cylinder does not include mounting hardware, a push rod, a brake booster, or a brake pressure switch. It is intended for DOT 3 brake fluid systems and should be bench-bled and bled according to the vehicle service procedure after installation.

Quality Assurance

MPA Electrical states that its brake master cylinders are tested against OE specifications using proprietary processes and strict protocols based on an extensive OE sample library. That process supports consistent braking performance right out of the box.