Dorman M39865 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Acura Legend

The Dorman M39865 brake master cylinder is designed specifically for Acura Legend models, providing reliable brake hydraulics performance. This aluminum master cylinder includes a reservoir and sensor, ensuring compatibility and functionality for your vehicle's braking system.

• Master cylinder bore diameter: 1 inch
• Constructed from durable aluminum material
• Includes reservoir for fluid storage
• Equipped with a sensor for brake system monitoring
• Two outlets with secondary outlet thread diameter of 10 mm
• Rearward outlet size: M12 x 1.0 with 1.0 thread pitch
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M39865 brake master cylinder is engineered to meet the specifications of Acura Legend vehicles, ensuring proper fit and function. Its 1-inch bore diameter allows for precise hydraulic pressure control, while the aluminum construction offers corrosion resistance and long-term durability. The included reservoir simplifies installation by providing a ready-to-use fluid container, and the integrated sensor supports brake system diagnostics and safety features. With two outlets and a secondary outlet thread diameter of 10 mm, this master cylinder supports efficient brake fluid distribution. The rearward outlet size of M12 x 1.0 and matching thread pitch ensure secure connections within the brake hydraulic system.

Common Applications and Problem Resolution

• Replaces worn or leaking brake master cylinders on Acura Legend models
• Addresses brake fluid leaks caused by damaged reservoirs or seals
• Restores proper brake pedal feel and hydraulic pressure
• Resolves brake warning light issues related to sensor failure
• Improves overall brake system reliability and safety

Installation Notes and Tips

• Verify compatibility with Acura Legend before installation
• Bleed the brake system thoroughly after installation to remove air
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Mounting hardware is not included; retain original hardware or source separately
• Inspect brake lines and fittings for wear or damage during installation

Quality Assurance and Warranty

Dorman brake master cylinders are manufactured to meet or exceed OEM standards for fit, form, and function. The M39865 part undergoes rigorous quality control to ensure reliable performance in Acura Legend brake systems. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.