MPA Electrical NM4031 Brake Master Cylinder

Brake Master Cylinder for Mustang

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built for 1999-2004 Ford Mustang models with front disc brakes, part number NM4031 is a standard replacement unit with an aluminum body, integrated reservoir, and included cap.

Key Features

• Fits 1999-2004 Ford Mustang, front disc brakes
• Standard replacement brake master cylinder
• Aluminum master cylinder construction
• 1.063 in. bore diameter
• Reservoir and master cylinder cap included
• Uses DOT 3 brake fluid
• New condition

Product Details

MPA Electrical NM4031 is engineered as a brake master cylinder replacement for Ford Mustang applications with front disc brakes. The 1.063-inch bore diameter, aluminum housing, and OE-based testing process support consistent hydraulic performance for daily driving and brake system service. This unit is supplied with the reservoir and cap, while mounting hardware, seals, push rod, booster, sensor, and brake pressure switch are not included.

The MPA Electrical New with front disc brakes product line focuses on direct-fit brake hydraulic components for vehicles that need restored pedal feel and dependable fluid pressure. For Mustang owners searching for a Ford Mustang brake master cylinder replacement, NM4031 provides a practical OE-style solution for the 1999-2004 platform.

This part cross-references Ford OE numbers such as F9ZZ2140A and XR3Z2140AA for the same application.

Common Issues This Part Can Help Address

• Low or inconsistent brake pedal pressure
• Internal master cylinder leakage
• Brake fluid bypass causing pedal fade
• Delayed hydraulic response during braking
• Need for a replacement brake master cylinder on a Ford Mustang with front disc brakes

Installation Notes and Tips

Verify bore size, reservoir style, and brake booster interface before installation. Bench bleeding the master cylinder before final assembly helps remove trapped air and supports proper pedal feel. Use DOT 3 brake fluid and inspect brake lines, fittings, and the booster for wear or leakage during service. Confirm fitment against the vehicle’s brake configuration, especially on 1999-2004 Ford Mustang models with front disc brakes.

Quality Assurance

MPA Electrical tests each unit against OE specifications using controlled procedures and an OE sample library to help ensure consistent braking performance out of the box. Part number NM4031 is a new standard replacement brake master cylinder built for Ford Mustang brake hydraulic service.