Dorman M630917 Brake Master Cylinder

Reliable Brake Master Cylinder for Subaru Vehicles

The Dorman M630917 brake master cylinder is engineered to restore proper brake hydraulics in select Subaru models. Designed with durable cast iron and equipped with a removable reservoir, this master cylinder ensures consistent brake fluid management for your Crosstrek, Forester, Impreza, Legacy, or Outback.

• Master cylinder bore diameter: 0.9375 inches for precise hydraulic pressure
• Constructed from cast iron for strength and durability
• Includes a removable reservoir for easy maintenance
• Equipped with a sensor to monitor brake fluid levels
• Two outlets with M12 x 1.0 thread size for secure connections
• Compatible with Subaru Crosstrek, Forester, Impreza, Legacy, and Outback models
• Part number M630917 for accurate identification

Product Details and Specifications

This Dorman brake master cylinder features a 0.9375-inch bore diameter, providing the correct hydraulic pressure needed for effective braking performance. The cast iron construction offers long-lasting durability under demanding conditions. The included removable reservoir simplifies brake fluid inspection and replacement, while the integrated sensor helps monitor fluid levels to maintain safety. With two outlets threaded M12 x 1.0, this master cylinder ensures secure and leak-free connections to the brake lines. This part is specifically designed for Subaru Crosstrek, Forester, Impreza, Legacy, and Outback vehicles, making it a precise replacement option for these models.

Common Brake System Issues Addressed

• Brake pedal sinking or sponginess due to master cylinder wear
• Brake fluid leaks from the master cylinder or reservoir
• Warning lights triggered by faulty brake fluid level sensors
• Reduced braking efficiency caused by internal seal failure
• Inconsistent brake pressure affecting vehicle safety

Installation Notes and Tips

When installing the Dorman M630917 brake master cylinder, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. The removable reservoir allows for easier fluid handling during installation. Verify that the sensor connector is securely attached to maintain accurate brake fluid level monitoring. Use appropriate tools to tighten the M12 x 1.0 threaded outlets to manufacturer torque specifications. Always consult the vehicle’s service manual for detailed installation procedures specific to Subaru Crosstrek, Forester, Impreza, Legacy, and Outback models.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron material and integrated sensor are tested for durability and reliability. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.