Dorman M631031 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda Fit

The Dorman M631031 brake master cylinder is designed specifically for Honda Fit models, providing precise hydraulic control for your vehicle's braking system. Engineered with durable aluminum construction, this master cylinder ensures consistent performance and longevity.

• Compatible with Honda Fit models
• Aluminum master cylinder material for durability
• 0.75 inch bore diameter for accurate hydraulic pressure
• Two mounting holes for secure installation
• Includes one master cylinder unit (no additional hardware included)
• Rearward outlet thread size M12 x 1.0 with two outlets

Product Details and Specifications

The Dorman M631031 brake master cylinder features a 0.75 inch bore diameter, which is critical for maintaining proper brake fluid pressure and pedal feel. Constructed from aluminum, this part offers resistance to corrosion and wear, extending the service life of your brake hydraulics. It includes two mounting holes to ensure a stable fit within the brake system assembly. This master cylinder does not come with mounting hardware, brake booster, reservoir, push rod, bleeder hoses, sensor, or mounting bracket, so these components must be sourced separately if needed. The rearward outlet has a thread diameter of M12 x 1.0, and the unit has two outlets to connect to the brake lines.

Common Applications and Problem Resolution

• Restores proper brake pedal pressure and responsiveness
• Replaces leaking or damaged master cylinders in Honda Fit vehicles
• Addresses brake fluid leaks caused by worn seals or corrosion
• Eliminates spongy or inconsistent brake pedal feel
• Supports safe and reliable brake system operation

Installation Notes and Tips

Installation of the Dorman M631031 brake master cylinder requires removal of the old master cylinder and proper bleeding of the brake system to remove air. Since mounting hardware and other components are not included, ensure you have the necessary parts and tools before beginning installation. Verify the bore diameter and outlet thread size match your vehicle’s specifications. It is recommended to consult the Honda Fit service manual for detailed installation procedures and torque specifications.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides durability and corrosion resistance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. For exact warranty information, please refer to Dorman’s official documentation or contact the manufacturer directly.