Centric 131.40009 Brake Master Cylinder

Brake Master Cylinder for Honda Civic and CRX

Centric C-TEK Standard Brake Master Cylinder 131.40009 is a direct replacement hydraulic component for select Honda Civic, CRX, and Civic del Sol applications. It is built with an aluminum master cylinder body, a plastic single reservoir, and a removable reservoir style for service-friendly replacement.

Centric’s C-TEK Standard Brake Master Cylinder line focuses on dependable replacement parts for import and domestic vehicles, combining broad application coverage with practical OE-style construction. Part number 131.40009 is a fitment-based solution for Honda Civic master cylinder replacement and related braking system service.

Key Features

• Aluminum master cylinder construction
• Plastic single reservoir with removable reservoir style
• 0.813 in. / 20.638 mm bore diameter
• Two mounting holes and two fluid ports
• M10-1.00 inverted flare outlet threads
• Cap included; gasket or seal included
• Brake booster, push rod, mounting hardware, and bleeder hoses not included

Detailed Product Overview

This Centric brake master cylinder is engineered for vehicles using a 13/16 in. bore and M10-1.00 inverted outlet connections. It is listed for 1988-1995 Honda Civic, 1988-1991 Honda CRX, 1990-1991 Honda CRX DX models, and 1993-1997 Honda Civic del Sol applications. The part number 131.40009 also cross-references Dorman - First Stop M39780 for the same application.

For Honda Civic and CRX brake master cylinder replacement, this unit provides the core hydraulic interface between the brake pedal input and the brake system’s fluid pressure circuit. The straight bore design, included reservoir cap, and sealed construction details support a clean replacement on vehicles that use the specified mounting and port configuration.

What This Part Helps Address

• Low or inconsistent brake pedal pressure
• External brake fluid leakage at the master cylinder
• Internal bypass that can cause pedal fade
• Brake warning concerns related to hydraulic loss
• Wear-related failure in the original Honda Civic or CRX master cylinder

Installation Notes and Tips

Verify bore size, outlet thread size, and reservoir layout before installation. This master cylinder uses M10-1.00 inverted flare ports and a removable single reservoir, so matching the original hydraulic connections is important for proper fitment. Bench bleeding is recommended before final installation to help remove trapped air from the hydraulic circuit.

Mounting hardware is not included, and the brake booster and push rod are not included. Confirm the vehicle’s original brake system configuration before ordering, especially on 1990-1991 Honda CRX DX models.

Quality Assurance

Centric Parts positions the C-TEK Standard line as a value-focused replacement range for import and domestic brake and clutch service. Part number 131.40009 is built to meet the application requirements for select Honda Civic, CRX, and Civic del Sol vehicles while maintaining the specified hydraulic and mounting dimensions.