MPA Electrical NM55463 Brake Master Cylinder

Brake Master Cylinder for Infiniti FX and QX70

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55463. It is a standard replacement unit built with an aluminum master cylinder body, plastic reservoir, and included reservoir cap for service-ready installation on supported Infiniti applications.

Compatible With 2009-2017 Infiniti FX35, FX37, FX50, and QX70 models with front disc brakes, this NM55463 master cylinder is engineered to match OE specifications using tested manufacturing protocols. It uses DOT 3 brake fluid and features a 0.983-inch bore diameter for proper hydraulic performance.

Key Features

• MPA Electrical NM55463 brake master cylinder
• Standard replacement grade for brake hydraulic service
• Aluminum master cylinder construction
• Plastic reservoir with reservoir cap included
• 0.983-inch bore diameter
• Two mounting holes with 0.337-inch mounting hole diameter
• Uses DOT 3 brake fluid
• New condition

Product Details

The MPA Electrical New with front disc brakes product line focuses on direct-fit brake hydraulic replacement parts for vehicles that need restored pedal feel and dependable fluid pressure. This brake master cylinder is built for Infiniti FX35, FX37, FX50, and QX70 applications listed above, and the NM55463 part number should be matched to the vehicle’s brake configuration before ordering. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Brake Issues This Part Can Address

• Low or inconsistent brake pedal pressure
• Internal master cylinder leakage
• Brake fluid bypass within the hydraulic system
• Delayed brake response after pedal application
• Loss of braking performance from worn hydraulic components

Installation Notes and Tips

• Verify vehicle fitment by year, model, and front disc brake configuration before installation.
• Bench bleed the master cylinder before connecting brake lines.
• Inspect brake lines, fittings, and fluid condition during replacement.
• Use only DOT 3 brake fluid as specified.
• Confirm the reservoir, cap, and mounting points align with the original unit.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled processes and sample-based validation to support consistent braking performance out of the box. Part number NM55463 is a new standard replacement for the listed Infiniti FX and QX70 applications.