Dorman M630431 Brake Master Cylinder

Reliable Brake Master Cylinder for Mazda 6

The Dorman M630431 brake master cylinder is engineered to restore proper brake hydraulics for your Mazda 6. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 0.813 inches for accurate fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes two outlets with a rearward outlet size of M10 x 1.0 and a thread pitch of 1.0
• Does not include reservoir or mounting hardware
• Secondary outlet thread diameter: 10 mm
• Sensor not included

Product Details and Specifications

This Dorman brake master cylinder (part number M630431) is designed specifically for the Mazda 6, providing a direct replacement for the original component. The aluminum construction offers durability and resistance to wear, while the 0.813-inch bore diameter ensures proper hydraulic pressure for effective braking. Featuring two outlets, including a rearward outlet with M10 x 1.0 thread size, this master cylinder supports the brake system's fluid distribution without the need for additional sensors or reservoirs.

Compatible Applications and Common Issues Addressed

• Compatible with Mazda 6 models requiring a 0.813-inch bore diameter master cylinder
• Replaces worn or leaking master cylinders causing brake fluid loss
• Resolves spongy or unresponsive brake pedal feel due to internal seal failure
• Addresses brake pressure inconsistencies affecting stopping performance
• Suitable for restoring brake hydraulics after component damage or wear

Installation Notes and Tips

Installation of the Dorman M630431 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Since mounting hardware and reservoir are not included, retain original components or source separately as needed. Verify thread sizes and outlet fittings match your vehicle’s brake lines before installation. Professional installation is recommended to maintain brake system safety and integrity.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Refer to Dorman’s official warranty policy for complete information.