Raybestos MC391393 Brake Master Cylinder

Reliable Brake Master Cylinder for Audi Models

The Raybestos Element3; New Brake Master Cylinder MC391393 is engineered to restore precise brake hydraulics for select Audi vehicles. Designed with durable aluminum construction and exact fitment specifications, this master cylinder supports consistent braking performance for Audi A6, A6 Quattro, RS4, RS6, S4, and S6 models.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.858-inch diameter for secure installation
• 1.060-inch bore size optimized for brake fluid pressure control
• Two ports with M12x1 thread size for primary and secondary brake lines
• Compatible with multiple Audi performance and luxury models

About the Raybestos Element3; New Product Line

The Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM standards. This product line emphasizes precision engineering and material quality, ensuring that the MC391393 brake master cylinder provides consistent hydraulic pressure and durability for demanding driving conditions in Audi vehicles.

Technical Details and Features

The MC391393 brake master cylinder features an aluminum body that offers strength while reducing weight. It includes two mounting holes, each with a diameter of 0.858 inches, allowing for a secure and exact fit. The 1.060-inch bore size is designed to maintain proper brake fluid displacement and pressure, critical for effective braking response. Both the primary and secondary ports use M12x1 threading, compatible with standard brake line fittings on Audi A6, A6 Quattro, RS4, RS6, S4, and S6 models.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing spongy or unresponsive brakes
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses inconsistent brake pedal feel or sinking pedal issues
• Supports brake system repairs after component failure or damage
• Ensures proper hydraulic function for Audi performance and luxury sedans

Installation Notes and Tips

When installing the Raybestos MC391393 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall bracket. Use compatible brake lines with M12x1 threaded fittings for secure connections. Bleed the brake system thoroughly after installation to remove air and verify proper hydraulic pressure. Follow manufacturer torque specifications for mounting bolts to avoid damage.

Quality Assurance and Warranty

Raybestos manufactures the MC391393 brake master cylinder to meet stringent quality standards, using durable aluminum materials and precision machining. This part is designed to provide reliable brake hydraulics for Audi vehicles. Warranty coverage details should be confirmed with the product documentation or supplier.