Dorman M390156 Brake Master Cylinder

Overview of the Dorman Brake Master Cylinder M390156

The Dorman Brake Master Cylinder M390156 is designed specifically for Mitsubishi Montero and Montero Sport models. This brake hydraulics component features a durable aluminum construction and includes a reservoir and sensor to ensure reliable brake system performance.

• Compatible with Mitsubishi Montero and Montero Sport
• Master cylinder bore diameter of 0.938 inches for precise hydraulic pressure
• Constructed from aluminum for strength and corrosion resistance
• Includes reservoir and sensor for integrated brake fluid management
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Mounting hardware not included

Detailed Product Description

The Dorman M390156 brake master cylinder is engineered to meet the specifications required by Mitsubishi Montero and Montero Sport vehicles. Its aluminum body provides a lightweight yet durable solution that resists corrosion and wear over time. The master cylinder features a bore diameter of 0.938 inches, which is critical for maintaining proper hydraulic pressure within the brake system. This part includes a reservoir to hold brake fluid and a sensor to monitor fluid levels or pressure, enhancing safety and system monitoring. The unit has two outlets, including a rearward outlet sized M10 x 1.0 with a thread pitch of 1.0, and a secondary outlet with a 10 mm thread diameter, ensuring compatibility with the vehicle’s brake lines.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure in Mitsubishi Montero and Montero Sport
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid leaks from damaged or corroded master cylinder bodies
• Addresses sensor failures related to brake fluid level monitoring
• Improves brake system reliability and responsiveness

Installation Notes and Tips

Installation of the Dorman M390156 brake master cylinder requires careful attention to brake fluid handling and bleeding procedures. Since mounting hardware is not included, reuse existing hardware or acquire compatible fasteners. Ensure all brake lines are properly connected to the two outlets, matching the rearward outlet size and thread pitch specifications. After installation, thoroughly bleed the brake system to remove air and verify sensor connections for proper operation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The M390156 brake master cylinder undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Consult product documentation for exact warranty terms.