Raybestos MC390123 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford and Mazda Vehicles

The Raybestos Element3; New Brake Master Cylinder MC390123 is engineered to restore precise brake hydraulics for select Ford and Mazda models. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance for vehicles like the Ford Probe and Mazda 626.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.343-inch diameter for secure installation
• 0.938-inch bore size optimized for proper hydraulic pressure
• Two ports with M10x1 thread size for primary and secondary connections
• Compatible with Ford 626, Mazda MX-6, and Ford Probe models

Product Line Details: Raybestos Element3; New

The Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components with modern materials and precise engineering. This brake master cylinder is part of that line, offering improved durability and fitment accuracy for vehicles requiring specific bore sizes and port configurations. The use of aluminum material in this product line helps reduce weight while maintaining strength and corrosion resistance.

Technical Description and Specifications

This brake master cylinder features a 0.938-inch bore size, which is critical for maintaining the correct hydraulic pressure in the brake system. It includes two mounting holes, each with a diameter of 0.343 inches, ensuring a secure and stable fit. The master cylinder has two ports, both threaded M10x1, designed for primary and secondary brake line connections. The aluminum construction provides a balance of durability and resistance to corrosion, suitable for the brake hydraulics system in Ford and Mazda vehicles such as the 626, MX-6, and Probe.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or leaking master cylinder
• Eliminates spongy or unresponsive brake pedal feel
• Replaces master cylinders with damaged or corroded aluminum bodies
• Addresses brake fluid leaks at mounting or port connections
• Ensures proper hydraulic function in Ford 626, Mazda MX-6, and Ford Probe brake systems

Installation Notes and Tips

When installing the Raybestos MC390123 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall. Use the specified 0.343-inch diameter mounting holes for secure attachment. Verify that the M10x1 threaded ports match the brake line fittings to prevent leaks. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure. Consult the vehicle’s service manual for torque specifications and detailed installation procedures.

Quality Assurance and Warranty Information

Raybestos manufactures the MC390123 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction is tested for durability and corrosion resistance to ensure long service life. This part is backed by Raybestos’ quality assurance protocols, providing confidence in its performance for Ford and Mazda brake systems. Warranty details are available through Raybestos and should be reviewed prior to installation.