MPA Electrical NM55458 Brake Master Cylinder

Brake Master Cylinder for Infiniti Front Disc Brake Applications

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built for 2005-2010 Infiniti G35, 2006-2010 Infiniti M35, and 2006-2010 Infiniti M45 vehicles with front disc brakes, part number NM55458 is a standard replacement for hydraulic brake service.

MPA Electrical NM55458 is engineered with an aluminum master cylinder body, a plastic reservoir, and a reservoir cap included. It uses DOT 3 brake fluid, has a 0.999 bore diameter, and includes a gasket or seal for service-ready installation. This brake master cylinder is tested against OE specifications using sample-based validation and controlled inspection processes to help deliver consistent braking performance.

• Fits 2005-2007 Infiniti G35, front disc brakes
• Fits 2006-2010 Infiniti M35, front disc brakes
• Fits 2006-2010 Infiniti M45, front disc brakes
• Aluminum master cylinder construction with plastic reservoir
• 0.999 bore diameter for OE-style hydraulic performance
• Reservoir and cap included; gasket or seal included
• Standard replacement grade for brake hydraulic repair
• Uses DOT 3 brake fluid

Detailed Product Information

Part number NM55458 is a brake master cylinder for Infiniti models equipped with front disc brakes. It is built to restore hydraulic pressure in the brake system and support normal pedal feel after wear, internal leakage, or fluid bypass in the original unit. The design includes two mounting holes, a 0.339 mounting hole diameter, and a master cylinder material specification of aluminum for a durable OE-style replacement. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Brake Issues This Part Can Address

• Low or sinking brake pedal
• Brake fluid bypass inside the master cylinder
• Uneven or inconsistent pedal response
• External fluid seepage at the master cylinder
• Loss of hydraulic pressure in the brake system

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and brake configuration before installation. This unit does not include mounting hardware, brake booster, push rod, sensor, brake pressure switch, or mounting bracket. Use clean DOT 3 brake fluid, bench bleed the master cylinder before final installation, and inspect the brake lines and reservoir connections for contamination or wear during service.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using proprietary processes and strict inspection protocols. That validation helps ensure the unit is ready for brake system service on arrival and supports consistent hydraulic performance for Infiniti G35, M35, and M45 applications.