Dorman M630802 Brake Master Cylinder

Reliable Brake Master Cylinder for Subaru Legacy and Outback

The Dorman M630802 brake master cylinder is engineered to restore proper brake hydraulics for Subaru Legacy and Outback models. Designed with precision, this master cylinder includes a removable reservoir and integrated sensor to ensure consistent brake performance.

• Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes a removable reservoir for easy maintenance and fluid replacement
• Equipped with a sensor to monitor brake fluid levels
• Two outlets with M12 x 1.0 thread size for secure brake line connections

Detailed Product Description

The Dorman M630802 brake master cylinder is specifically designed for Subaru Legacy and Outback vehicles, providing a direct replacement for the original component. Its aluminum construction offers strength and resistance to corrosion, which is critical for maintaining brake system integrity over time. The 0.938-inch bore diameter ensures proper hydraulic pressure is maintained for effective braking. This master cylinder comes with a removable reservoir, simplifying brake fluid inspection and replacement. Additionally, the included sensor helps monitor fluid levels to alert drivers of potential issues before they affect braking performance. The two outlets, both with M12 x 1.0 thread pitch, allow for secure and leak-free connections to the brake lines.

Common Applications and Issues Addressed

• Restores brake hydraulic pressure in Subaru Legacy and Outback models
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Resolves brake pedal sponginess due to internal cylinder wear
• Addresses brake warning light activation related to fluid level sensor faults
• Improves overall brake system reliability and safety

Installation Notes and Tips

Installation of the Dorman M630802 brake master cylinder requires careful attention to brake fluid handling and bleeding procedures. Ensure the brake system is properly bled after installation to remove air and restore full braking function. The removable reservoir design facilitates fluid replacement during installation. Verify that the sensor connector is securely attached to maintain accurate fluid level monitoring. This part does not include mounting hardware, so retain original fasteners or source replacements as needed.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to long-term durability and reliable brake system operation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components to cover defects in materials and workmanship.