Raybestos MC390778 Brake Master Cylinder

Overview of Raybestos Element3; New Brake Master Cylinder MC390778

The Raybestos Element3; New Brake Master Cylinder MC390778 is engineered for reliable brake hydraulics performance in select Audi and Volkswagen models. Designed with precision, this aluminum master cylinder ensures consistent braking response and durability for vehicles like the Audi A4, A6, S4, S6, and Volkswagen Passat.

• Constructed from durable aluminum for corrosion resistance
• Features a 1.000 inch bore size for optimal hydraulic pressure
• Includes two mounting holes with a diameter of 0.858 inches for secure installation
• Equipped with two ports, both with M12x1 thread size for compatibility
• Compatible with multiple Audi and Volkswagen models including A4 Quattro and A6 Quattro

Detailed Product Features and Specifications

This brake master cylinder, part number MC390778, is crafted from aluminum, providing a lightweight yet sturdy component essential for brake hydraulics. The 1.000 inch bore size is designed to deliver precise hydraulic pressure, ensuring effective brake fluid transfer. It includes two mounting holes, each with a diameter of 0.858 inches, allowing for a secure and stable fitment. The master cylinder has two ports, both threaded M12x1, facilitating proper brake line connections. This part is specifically compatible with Audi models such as the A4, A4 Quattro, A6, A6 Quattro, S4, and S6, as well as the Volkswagen Passat, making it a targeted replacement for these vehicles.

About the Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM standards. This product line emphasizes material quality and precise engineering, as seen in the MC390778 master cylinder’s aluminum construction and exact bore sizing. Element3; New parts are designed to provide consistent performance and durability for specific vehicle applications, including the Audi and Volkswagen models listed.

Common Applications and Problem Resolution

• Restores proper brake fluid pressure in Audi A4 and A6 models
• Addresses brake pedal sinking or sponginess issues
• Replaces leaking or damaged master cylinders in Volkswagen Passat
• Improves brake system responsiveness in Audi S4 and S6 vehicles
• Solves hydraulic fluid leaks caused by worn ports or seals

Installation Notes and Tips

When installing the Raybestos MC390778 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall. Use the specified 0.858 inch diameter mounting holes for secure attachment. Confirm that brake lines match the M12x1 threaded ports to avoid leaks. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure. It is recommended to inspect related brake components during installation for optimal system performance.

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet stringent quality standards, ensuring reliable operation in brake hydraulic systems. The aluminum construction resists corrosion and wear, contributing to long service life. While specific warranty details for part number MC390778 should be confirmed with the supplier, Raybestos typically offers coverage against defects in materials and workmanship.