Dorman M39877 Brake Master Cylinder

Overview of the Dorman Brake Master Cylinder M39877

The Dorman Brake Master Cylinder M39877 is designed specifically for Volkswagen Passat models, providing reliable brake hydraulics performance. Crafted from durable aluminum, this master cylinder ensures consistent braking pressure and long-lasting operation.

• Master cylinder bore diameter: 0.875 inches for precise hydraulic control
• Constructed from aluminum for strength and corrosion resistance
• Includes four outlets to support complex brake systems
• Secondary outlet thread diameter of 10 mm with a 1.0 thread pitch
• Rearward outlet size: M10 x 1.0 for secure brake line connections
• Does not include reservoir or mounting hardware
• Compatible with Volkswagen Passat brake hydraulic systems

Detailed Product Description

The Dorman M39877 brake master cylinder is engineered to meet the specifications required by Volkswagen Passat vehicles. Its 0.875-inch bore diameter allows for accurate hydraulic pressure distribution, essential for effective braking response. Made from aluminum, the master cylinder offers enhanced durability and resistance to corrosion, which is critical in brake system components exposed to varying environmental conditions.

This master cylinder features four outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, both with a 1.0 thread pitch. These specifications ensure compatibility with the brake lines and fittings used in Volkswagen Passat models. Note that this part does not include a reservoir or mounting hardware, so those components must be sourced separately if needed.

Common Applications and Issues Addressed

• Replacement for worn or leaking brake master cylinders in Volkswagen Passat vehicles
• Restores proper hydraulic pressure for consistent brake pedal feel
• Resolves issues related to brake fluid leaks at the master cylinder
• Addresses spongy or unresponsive brake pedal performance
• Supports brake system maintenance and safety compliance

Installation Notes and Tips

• Ensure compatibility with your specific Volkswagen Passat model year before installation
• Brake fluid reservoir and mounting hardware are not included and must be installed separately
• Bleed the brake system thoroughly after installation to remove air and ensure proper function
• Inspect brake lines and fittings for wear or damage during replacement

Quality Assurance and Warranty

Dorman manufactures the M39877 brake master cylinder to meet industry standards for brake hydraulics components. While specific warranty details are not provided, Dorman products typically undergo rigorous quality control to ensure reliable performance in Volkswagen Passat brake systems.