Dorman M39850 Brake Master Cylinder

Reliable Brake Master Cylinder for Subaru Legacy

The Dorman M39850 Brake Master Cylinder is engineered to restore proper brake hydraulics for Subaru Legacy models. Designed with precision, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

Key Features of the Dorman M39850 Brake Master Cylinder

• Master cylinder bore diameter of 1.063 inches for accurate hydraulic performance
• Constructed from durable aluminum material for corrosion resistance and longevity
• Includes an integrated reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Two outlets with a secondary outlet thread diameter of 10 mm and rearward outlet size of M10 x 1.0
• Thread pitch of 1.0 for secure fitting

Detailed Product Description

The Dorman M39850 Brake Master Cylinder is specifically designed for Subaru Legacy vehicles, providing a direct replacement for the original component. Its aluminum construction offers enhanced durability and resistance to wear, while the included reservoir simplifies brake fluid management. The master cylinder features a 1.063-inch bore diameter, which is critical for maintaining proper hydraulic pressure within the brake system. Additionally, the unit includes a sensor to ensure accurate monitoring of brake fluid levels and system performance. With two outlets and precise thread specifications, this master cylinder integrates seamlessly with the vehicle's brake hydraulics.

Common Applications and Issues Addressed

• Restores brake fluid pressure for consistent braking response
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Resolves brake pedal sinking or sponginess due to internal seal failure
• Addresses warning light activation related to brake fluid sensor faults
• Improves overall brake system reliability in Subaru Legacy models

Installation Notes and Tips

Installation of the Dorman M39850 Brake Master Cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Verify thread pitch and outlet sizes match the vehicle specifications before installation. Since mounting hardware is not included, retain original fasteners or source compatible hardware separately. It is recommended to inspect related brake components during replacement to maintain system integrity.

Quality Assurance and Warranty

Dorman manufactures the M39850 Brake Master Cylinder to meet or exceed OEM standards for fit and function. The aluminum construction and integrated sensor contribute to reliable operation. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship.