Raybestos MC391383 Brake Master Cylinder

Reliable Brake Master Cylinder for Kia Optima

The Raybestos Element3; New Brake Master Cylinder MC391383 is engineered to restore precise brake hydraulics for Kia Optima models. Designed with durable aluminum construction and specific mounting features, this master cylinder ensures consistent brake performance and safety.

• Compatible with Kia Optima vehicles
• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.342-inch diameter for secure installation
• 0.938-inch bore size for optimal hydraulic pressure
• Four ports with M10x1 thread size for primary and secondary connections

About the Raybestos Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components with precise engineering and quality materials. This brake master cylinder MC391383 is part of that line, offering a balance of durability and performance tailored for specific vehicle applications like the Kia Optima.

Detailed Product Description

This brake master cylinder features an aluminum body that resists corrosion and reduces weight compared to traditional cast iron units. The 0.938-inch bore size is designed to provide the correct hydraulic pressure for the Kia Optima’s braking system. With two mounting holes sized at 0.342 inches in diameter, installation is straightforward and secure. The unit includes four ports, each threaded M10x1, accommodating both primary and secondary brake lines to maintain proper fluid flow and pressure distribution.

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Loss of hydraulic pressure affecting braking efficiency
• Brake fluid leaks around the master cylinder mounting area
• Uneven brake application or delayed brake response
• Replacement of worn or damaged original master cylinder components

Installation Notes and Tips

Ensure the mounting surface is clean and free of debris before installation. Verify that the mounting holes align correctly with the vehicle’s brake booster or firewall. Use the specified M10x1 threaded ports for brake line connections, tightening to manufacturer torque specifications. After installation, bleed the brake system thoroughly to remove air and restore proper hydraulic pressure.

Quality Assurance and Warranty

Raybestos manufactures the MC391383 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance for extended service life. While specific warranty details may vary, Raybestos products typically include coverage against defects in materials and workmanship.