MPA Electrical NM4040 Brake Master Cylinder

Brake Master Cylinder for Ford and Lincoln

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM4040. It is a standard replacement unit built with an aluminum master cylinder body, plastic reservoir, and DOT 3 fluid compatibility for 2002-2006 Ford Expedition and 2002-2006 Lincoln Navigator applications with front disc brakes.

Key Features

• Brake master cylinder for hydraulic brake system service
• Fits 2002-2006 Ford Expedition, new with front disc brakes
• Fits 2002-2006 Lincoln Navigator, new with front disc brakes
• 1.125 in. master cylinder bore diameter
• Aluminum master cylinder material with plastic reservoir
• Reservoir, cap, and gasket/seal included
• DOT 3 brake fluid type
• Two mounting holes with 0.355 in. mounting hole diameter
• Standard replacement grade

Product Details

MPA Electrical NM4040 is engineered to restore braking performance by matching OE specifications through tested manufacturing processes and strict inspection protocols. The front disc brake application coverage makes it a direct service option for 2002-2006 Ford Expedition and 2002-2006 Lincoln Navigator models that need a replacement brake master cylinder. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Low or inconsistent brake pedal feel
• Internal master cylinder leakage
• Brake fluid loss at the master cylinder
• Reduced hydraulic pressure in the brake system
• Brake warning symptoms related to master cylinder wear

Installation Notes and Tips

Before installation, confirm the vehicle is equipped with front disc brakes and verify bore and mounting dimensions against the original unit. Bench bleeding is recommended before connecting brake lines to help remove trapped air from the hydraulic circuit. Use clean DOT 3 brake fluid and inspect the brake booster, lines, and fittings for wear or contamination during service. NM4040 does not include mounting hardware, brake booster, push rod, or mounting bracket.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict protocols to help ensure consistent braking performance out of the box. Part number NM4040 is a new standard replacement brake master cylinder built for dependable hydraulic service.