Raybestos MC390398 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford, Lincoln, Mazda, and Mercury

The Raybestos Element3; New Brake Master Cylinder MC390398 is engineered to restore precise brake hydraulics for select Ford, Lincoln, Mazda, and Mercury vehicles. Designed with durable aluminum construction and specific mounting features, this master cylinder ensures consistent brake performance and safety.

• Constructed from lightweight, corrosion-resistant aluminum
• Features 2 mounting holes with a diameter of 0.413 inches for secure installation
• 1.060-inch bore size optimized for accurate hydraulic pressure
• Equipped with 2 ports: primary port thread M10x1 and secondary port thread M12x1
• Compatible with Ford Explorer, Ranger, Lincoln Aviator, Mazda B2300, B2500, B3000, B4000, and Mercury Mountaineer

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 specifications. This brake master cylinder is part of that line, offering precise bore sizing and port threading to match factory requirements. The aluminum material provides a balance of strength and corrosion resistance, suitable for the demands of daily driving and varied weather conditions.

Detailed Product Description

The MC390398 brake master cylinder is designed with two mounting holes, each measuring 0.413 inches in diameter, ensuring a secure fit on compatible vehicles. Its 1.060-inch bore size allows for proper hydraulic fluid displacement, critical for effective brake system operation. The master cylinder includes two ports with specific thread sizes—M10x1 for the primary port and M12x1 for the secondary port—allowing for correct brake line connections. The aluminum construction reduces weight while maintaining durability and resistance to corrosion, which is essential for long-term brake system reliability.

Common Applications and Issues Addressed

• Restores brake hydraulic pressure in Ford Explorer and Ranger models
• Replaces worn or leaking master cylinders in Lincoln Aviator vehicles
• Solves brake pedal sinking or sponginess in Mazda B-series trucks (B2300, B2500, B3000, B4000)
• Addresses brake fluid leaks and loss of braking efficiency in Mercury Mountaineer
• Ensures proper brake system function after component failure or wear

Installation Notes and Tips

• Verify compatibility with vehicle make and model before installation
• Ensure mounting holes align correctly with the vehicle’s brake booster or firewall
• Use appropriate thread sealant or fittings for M10x1 and M12x1 ports to prevent leaks
• Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic pressure
• Inspect brake lines and related components for wear during replacement

Quality Assurance and Warranty

Raybestos manufactures the MC390398 brake master cylinder to meet stringent quality standards, ensuring reliable performance and durability. The Element3; New line components undergo rigorous testing to comply with OEM specifications. Warranty coverage details should be confirmed with the product documentation or supplier.