Dorman M390044 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda Civic and Civic del Sol

The Dorman M390044 brake master cylinder is engineered to restore proper brake hydraulics for Honda Civic and Civic del Sol models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.

Key Features of the Dorman M390044 Brake Master Cylinder

• Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for fluid storage and sensor for brake system monitoring
• Two outlets with rearward outlet size M12 x 1.0 and secondary outlet thread diameter 10 mm
• Thread pitch of 1.0 ensures secure fitting
• Package contains the master cylinder unit; mounting hardware not included

Detailed Product Description

The Dorman M390044 brake master cylinder is specifically designed for Honda Civic and Civic del Sol vehicles, providing a direct replacement for the original part. Its 0.938-inch bore diameter allows for precise hydraulic pressure control, essential for effective braking. Made from aluminum, this master cylinder offers enhanced durability and resistance to corrosion compared to traditional materials. The included reservoir simplifies installation and maintenance by housing brake fluid securely, while the integrated sensor supports the vehicle’s brake monitoring system. Featuring two outlets, including a rearward outlet sized M12 x 1.0 and a secondary outlet with a 10 mm thread diameter, this part ensures compatibility with the brake lines of the specified Honda models.

Common Issues Addressed by This Brake Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Brake fluid leaks around the master cylinder area
• Inconsistent brake pressure affecting stopping performance
• Warning lights triggered by faulty brake fluid sensors
• Failure of the original master cylinder causing brake system malfunction

Installation Notes and Tips

• Ensure the brake system is properly bled after installation to remove air pockets
• Verify thread pitch and outlet sizes match your vehicle’s brake lines before installation
• Mounting hardware is not included; reuse original hardware or source compatible fasteners
• Handle the reservoir carefully to avoid damage during installation
• Consult the vehicle’s service manual for torque specifications and installation procedures

Quality Assurance and Warranty Information

Dorman manufactures the M390044 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system operation. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to Dorman’s official documentation for complete warranty terms.