Dorman M390206 Brake Master Cylinder

Reliable Brake Master Cylinder for Subaru Impreza

The Dorman M390206 Brake Master Cylinder is engineered to restore proper brake hydraulics for Subaru Impreza models. Designed with precision, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 1 inch for optimal fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Equipped with sensor for brake system monitoring
• Two outlets with secondary outlet thread diameter of 10 mm
• Rearward outlet size: M10 x 1.0 with 1.0 thread pitch
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390206 brake master cylinder is specifically designed for Subaru Impreza vehicles, providing a precise fit and reliable performance. Its aluminum construction offers durability and resistance to corrosion, which is essential for maintaining brake system integrity over time. The 1-inch bore diameter allows for effective brake fluid displacement, ensuring consistent hydraulic pressure. This master cylinder includes a reservoir to hold brake fluid and a sensor to monitor brake system status, enhancing safety and functionality. The two outlet ports, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, accommodate the brake lines for proper fluid distribution.

Common Applications and Problem Resolution

• Restores brake pressure in Subaru Impreza brake systems
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses brake pedal sponginess or failure to build pressure
• Resolves sensor-related brake warning light issues
• Fixes leaks or damage in the master cylinder reservoir area

Installation Notes and Tips

Installation of the Dorman M390206 master cylinder requires careful attention to brake system bleeding procedures to remove air and ensure proper hydraulic function. Since mounting hardware is not included, retain or source compatible fasteners for secure installation. Verify thread pitch and outlet sizes to match existing brake lines on the Subaru Impreza. It is recommended to inspect brake lines and related components during installation for any signs of wear or damage.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit and function on Subaru Impreza models. The aluminum construction and integrated sensor contribute to long-term reliability. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship.