MPA Electrical NM4154 Brake Master Cylinder

Brake Master Cylinder for Expedition and Navigator

MPA Electrical NM4154 is a new brake master cylinder for 2007-2009 Ford Expedition and 2007-2009 Lincoln Navigator models with front disc brakes. It is built as a standard replacement unit with an aluminum body, plastic reservoir, and DOT 3 fluid compatibility for direct brake hydraulic service.

Key Features

• Standard replacement brake master cylinder for front disc brake applications
• Aluminum master cylinder construction with plastic reservoir
• 1.503 in. bore diameter for OE-style hydraulic performance
• Reservoir, cap, and gasket/seal included
• Two mounting holes with 0.355 in. mounting hole diameter
• Brake booster, push rod, sensor, and pressure switch not included
• New condition part number NM4154

Product Details

MPA Electrical NM4154 is engineered to restore braking performance by replacing a worn or leaking master cylinder in Ford Expedition and Lincoln Navigator vehicles equipped with front disc brakes. MPA Electrical uses OE sample data and testing protocols to verify units against OE specifications, helping deliver consistent hydraulic response after installation. This part cross-references OE numbers 7L1Z2140D and 7L1Z2140E for the same application.

The NM4154 master cylinder includes the reservoir, cap, and gasket/seal, and it uses DOT 3 brake fluid. The aluminum housing and 1.503-inch bore diameter support stable brake pedal feel in the original hydraulic system.

What It Helps Fix

• Low or sinking brake pedal caused by internal master cylinder wear
• Brake fluid leaks at the master cylinder body or reservoir area
• Uneven hydraulic pressure affecting braking response
• Soft pedal feel after brake system service
• Loss of braking performance in Expedition and Navigator front disc brake systems

Installation Notes and Tips

Before installation, confirm vehicle fitment for 2007-2009 Ford Expedition and 2007-2009 Lincoln Navigator with front disc brakes. Bench bleed the master cylinder before connecting brake lines, and use clean DOT 3 brake fluid only. Transfer any required external components from the original system, since mounting hardware, brake booster, push rod, sensor, and brake pressure switch are not included.

Quality Assurance

MPA Electrical tests each unit against OE specifications using controlled inspection and validation processes based on its OE sample library. That approach supports consistent out-of-box brake hydraulic performance for the NM4154 replacement master cylinder.