Dorman M631067 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda 3 and 3 Sport

The Dorman M631067 brake master cylinder is engineered to restore proper brake hydraulics for Mazda 3 and 3 Sport models. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Compatible with Mazda 3 and Mazda 3 Sport models
• Constructed from durable aluminum material
• Includes master cylinder cap and bleeder kit for maintenance
• Features two mounting holes for secure installation
• Flanged dual outlets with M12x1.0 thread size and 1 mm pitch

Product Features and Specifications

The Dorman M631067 brake master cylinder features a bore diameter of 0.812 inches, providing precise hydraulic pressure control. It includes two flanged outlets with a 12 mm diameter and 1 mm thread pitch, designed for secure brake line connections. The unit comes with a removable reservoir type and a master cylinder cap included, but does not include a dust boot, mounting hardware, push rod, brake booster, or sensor. This master cylinder is designed for vehicles requiring two outlet ports and mounts with two holes for a stable fit.

Purpose and Common Applications

• Restores brake fluid pressure for Mazda 3 and 3 Sport brake systems
• Replaces worn or leaking master cylinders causing brake pedal issues
• Addresses brake fluid leaks from the master cylinder assembly
• Improves brake responsiveness and pedal feel
• Supports brake system maintenance and safety compliance

Installation Notes and Tips

Installation of the Dorman M631067 brake master cylinder requires proper brake fluid handling and bleeding procedures. Ensure the mounting surface is clean and free of debris before installation. Use the included bleeder kit to remove air from the brake lines after installation. Note that mounting hardware, push rod, and brake booster are not included and may need to be reused or sourced separately. Verify compatibility with your specific Mazda 3 or 3 Sport model year before 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 offers corrosion resistance and durability under normal operating conditions. This part includes a master cylinder cap and bleeder kit to support proper maintenance. Warranty coverage details should be confirmed with the product documentation or supplier.