Raybestos MC391079 Brake Master Cylinder

Reliable Brake Master Cylinder for Buick and Cadillac Models

The Raybestos Element3; New Brake Master Cylinder MC391079 is engineered to restore precise brake hydraulics for select Buick and Cadillac vehicles. Designed specifically for the DTS and Lucerne models, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Constructed from durable aluminum for long-lasting performance
• Features a 1.000-inch bore size for optimal hydraulic function
• Includes two mounting holes with a diameter of 0.421 inches for secure installation
• Equipped with M13x1.5 primary and secondary port threads for compatibility with OEM brake lines
• Part number MC391079 ensures exact fitment for Buick DTS and Cadillac Lucerne

About the Raybestos Element3; New Product Line

The Element3; New line from Raybestos focuses on delivering high-quality brake hydraulics components that meet or exceed OEM specifications. This product line emphasizes precision engineering and material quality, such as the aluminum construction found in the MC391079 master cylinder, to provide reliable brake system performance for luxury vehicles like Buick and Cadillac.

Detailed Product Description

This brake master cylinder is crafted from aluminum, offering a balance of strength and corrosion resistance essential for brake hydraulics. The 1.000-inch bore size is designed to maintain proper hydraulic pressure, ensuring responsive brake pedal feel. With two mounting holes sized at 0.421 inches in diameter, installation aligns with factory specifications. Both primary and secondary ports feature M13x1.5 threading, compatible with standard brake line fittings on the Buick DTS and Cadillac Lucerne models. The MC391079 part number guarantees a precise replacement part for these vehicles.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses brake system failure due to internal seal wear or corrosion
• Improves brake responsiveness in Buick DTS and Cadillac Lucerne models
• Eliminates brake pedal sinking or inconsistent braking performance

Installation Notes and Tips

Ensure the brake system is properly bled after installation to remove air and maintain hydraulic integrity. Verify that mounting holes align correctly with the vehicle’s firewall or mounting bracket. Use compatible brake fluid and inspect all brake lines for wear or damage during replacement. Tighten port fittings to manufacturer torque specifications to prevent leaks.

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet strict quality standards, ensuring durability and reliable performance. This part is backed by Raybestos’ quality assurance processes, providing confidence in fitment and function for Buick DTS and Cadillac Lucerne vehicles. Warranty details are available through Raybestos and should be confirmed at the time of purchase.