MPA Electrical NM4127 Brake Master Cylinder

Brake Master Cylinder for Ram and Dodge Ram

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Part number NM4127 is a standard replacement unit for Ram 1500 Classic, Ram 1500, and Dodge Ram 1500 models with front disc brakes.

MPA Electrical’s New with front disc brakes product line focuses on direct-fit brake hydraulics for these Ram applications, with testing against OE specifications to help deliver reliable braking performance after installation.

Key Features

• Brake master cylinder for front disc brake applications
• Aluminum master cylinder body with plastic reservoir
• 1.25 in. bore diameter
• Reservoir, cap, and gasket or seal included
• Uses DOT 3 brake fluid
• Standard replacement grade
• Two mounting holes with 0.360 in. mounting hole diameter
• New condition

Detailed Description

The MPA Electrical NM4127 brake master cylinder is built to restore hydraulic braking performance on 2007-2010 Dodge Ram 1500, 2011-2018 Ram 1500, and 2019-2024 Ram 1500 Classic models equipped with front disc brakes. The aluminum housing and integrated plastic reservoir provide a direct replacement format, while the 1.25-inch bore supports proper brake system pressure for the listed applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Low or inconsistent brake pedal feel
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the reservoir or seals
• Reduced braking response from a worn hydraulic unit
• Brake system performance issues on Ram 1500 and Dodge Ram 1500 trucks

Installation Notes

Verify vehicle fitment by year, make, model, and front disc brake configuration before installation. This master cylinder does not include a brake booster, push rod, mounting hardware, mounting bracket, sensor, or brake pressure switch. Bench bleeding the master cylinder before installation and using clean DOT 3 fluid helps support proper system bleeding and pedal feel.

Quality Assurance

MPA Electrical tests each unit against OE specifications using controlled processes and sample-based validation from its OE reference library. NM4127 is supplied as a new brake master cylinder for direct replacement service on the listed Ram and Dodge Ram applications.