Dorman M631029 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda HR-V

The Dorman M631029 brake master cylinder is engineered to restore proper brake hydraulics for your Honda HR-V. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Compatible with Honda HR-V models
• Constructed from durable aluminum material
• Master cylinder bore diameter of 0.813 inches for accurate fluid displacement
• Two mounting holes for secure installation
• Includes one master cylinder unit without reservoir or booster
• Secondary outlet thread diameter: 12 mm (M12 x 1.0)
• Two outlet ports for brake line connections

Product Details and Specifications

The Dorman M631029 brake master cylinder is designed specifically for the brake hydraulics system of the Honda HR-V. Its aluminum construction offers corrosion resistance and long-term durability under demanding conditions. The master cylinder features a bore diameter of 0.813 inches, which is critical for maintaining the correct hydraulic pressure within the braking system. It includes two mounting holes to ensure a secure fit on the vehicle’s firewall or mounting bracket. This part does not include a brake booster, reservoir, push rod, or mounting hardware, so those components must be sourced separately if needed. The rearward outlet size is M12 x 1.0, compatible with standard brake line fittings for the HR-V.

Common Applications and Problem Resolution

• Restores brake fluid pressure for improved pedal feel and braking response
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses spongy or soft brake pedal issues related to master cylinder failure
• Eliminates brake drag caused by internal cylinder seal wear
• Prevents brake system failure due to master cylinder malfunction

Installation Notes and Tips

When installing the Dorman M631029 brake master cylinder on a Honda HR-V, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Since mounting hardware and reservoir are not included, verify compatibility with existing components or acquire necessary parts separately. Use appropriate brake fluid and follow manufacturer torque specifications for mounting bolts. Inspect brake lines and fittings for wear or damage during installation.

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 resistance to corrosion and wear, contributing to long service life. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to ensure customer confidence and product reliability.