MPA Electrical NM55378 Brake Master Cylinder

Brake Master Cylinder for Honda Civic and Acura CSX

Restore consistent brake pedal response with this MPA Electrical brake master cylinder, part number NM55378. Built as a standard replacement for front disc brake applications, it is engineered for 2006-2011 Honda Civic and 2006-2007 Acura CSX models with the correct OE-style fitment.

Key Features

• Standard replacement brake master cylinder for hydraulic brake systems
• Aluminum master cylinder body with plastic reservoir
• 0.75 in. bore diameter for proper hydraulic pressure delivery
• Reservoir, cap, and gasket/seal included
• Uses DOT 3 or DOT 4 brake fluid
• Two mounting holes with 0.360 in. mounting hole diameter
• New condition, with no brake booster, push rod, sensor, or pressure switch included

Product Details

MPA Electrical NM55378 is a brake master cylinder designed to restore braking performance by replacing a worn or leaking hydraulic unit. The aluminum housing and integrated plastic reservoir support dependable fluid management, while the 0.75-inch bore helps maintain the pedal feel and hydraulic output expected in OE-style brake systems. This part is built for front disc brake vehicles and is a direct replacement for Honda Civic and Acura CSX applications listed below. This part cross-references OE numbers 46100-SNA-A01 and 46100-SVA-A01 for the same application.

What It Helps Fix

• Low or sinking brake pedal caused by internal master cylinder wear
• Brake fluid leakage around the master cylinder body or seals
• Uneven or inconsistent hydraulic pressure in the brake system
• Delayed brake response from a failing primary brake hydraulic component
• Brake warning symptoms related to master cylinder deterioration

Installation Notes

Compatible With 2006-2011 Honda Civic, front disc brakes. Compatible With 2006-2007 Acura CSX, front disc brakes. Verify reservoir and mounting dimensions before installation, and bench bleed the master cylinder before connecting brake lines. Use DOT 3 or DOT 4 brake fluid only, and transfer any required external components from the original setup if needed, since mounting hardware, brake booster, push rod, sensor, and brake pressure switch are not included.

Quality Assurance

MPA Electrical tests each brake master cylinder against OE specifications using controlled procedures and an OE sample library to help ensure consistent performance out of the box. NM55378 is supplied new and built to standard replacement requirements for the listed Honda Civic and Acura CSX applications.