Raybestos MC391133 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford Explorer and Mercury Mountaineer

The Raybestos Element3; New Brake Master Cylinder MC391133 is engineered to restore precise brake hydraulics for your Ford Explorer, Explorer Sport Trac, or Mercury Mountaineer. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance.

• Constructed from lightweight, corrosion-resistant aluminum
• Features a 1.060-inch bore size for optimal hydraulic pressure
• Includes two mounting holes with a 0.350-inch diameter for secure installation
• Equipped with M12x1 primary and secondary port threads for reliable brake line connections
• Compatible with Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models

Detailed Specifications and Product Line Information

This brake master cylinder, part number MC391133, is part of the Raybestos Element3; New product line, which focuses on delivering precise hydraulic components with enhanced durability and fitment accuracy. The aluminum master cylinder material reduces weight while resisting corrosion, contributing to long-term reliability. The 1.060-inch bore size is calibrated to maintain proper brake fluid pressure, essential for safe braking response. The two mounting holes, each with a 0.350-inch diameter, ensure a secure and stable fit on compatible vehicles. Both primary and secondary ports use M12x1 threading, facilitating straightforward brake line attachment and maintenance.

Applications and Common Issues Addressed

• Restores brake hydraulic pressure for Ford Explorer and Mercury Mountaineer brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid leaks from damaged or corroded master cylinder bodies
• Addresses inconsistent brake pedal feel due to internal seal failure
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

When installing the Raybestos MC391133 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall. Use the specified 0.350-inch diameter mounting holes for proper bolt fitment. Verify that the M12x1 threaded ports match the brake line fittings to avoid leaks. Bleed the brake system thoroughly after installation to remove air and restore full hydraulic pressure. Follow manufacturer torque specifications to prevent damage to the aluminum housing.

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details for part number MC391133 should be confirmed at the point of purchase, Raybestos typically offers limited warranties covering defects in materials and workmanship.