Dorman M630916 Brake Master Cylinder

Reliable Brake Master Cylinder for Subaru Forester and Impreza

The Dorman M630916 brake master cylinder is engineered to restore proper brake hydraulics in select Subaru models. Designed specifically for the Forester, Impreza, XV, and XV Crosstrek, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 0.9375 inches for precise hydraulic control
• Durable cast iron construction for long-lasting performance
• Includes a removable reservoir for easy maintenance
• Equipped with a sensor to monitor brake fluid levels
• Two outlets with M12 x 1.0 thread pitch for secure connections
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M630916 brake master cylinder is crafted from cast iron, providing strength and resistance to wear under demanding braking conditions. Its 0.9375-inch bore diameter is designed to match the hydraulic requirements of Subaru Forester, Impreza, XV, and XV Crosstrek models. The included removable reservoir simplifies brake fluid inspection and replacement, while the integrated sensor helps maintain optimal fluid levels. Featuring two outlets with M12 x 1.0 thread pitch, this master cylinder ensures compatibility with the vehicle’s brake lines. Note that mounting hardware is not included, so existing hardware should be reused or sourced separately.

Common Applications and Problem Resolution

• Restores brake fluid pressure for improved pedal feel and braking response
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake warning light activation due to faulty fluid level sensor
• Fixes spongy or unresponsive brake pedal issues related to master cylinder wear
• Supports brake system maintenance on Subaru Forester, Impreza, XV, and XV Crosstrek

Installation Notes and Tips

Installation of the Dorman M630916 brake master cylinder requires basic mechanical skills and proper brake system knowledge. It is important to reuse or replace mounting hardware as needed since it is not included. After installation, thoroughly bleed the brake system to remove air and ensure proper hydraulic function. Verify sensor connections to maintain accurate brake fluid level monitoring. Consult the vehicle’s service manual for torque specifications and detailed procedures.

Quality Assurance and Warranty Information

Dorman manufactures the M630916 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated sensor contribute to reliable brake system performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to the product documentation or Dorman’s official resources for exact warranty terms.