Raybestos MC391231 Brake Master Cylinder

Reliable Brake Master Cylinder for Audi and Volkswagen Models

The Raybestos Element3; New Brake Master Cylinder MC391231 is engineered to restore precise brake hydraulics for select Audi and Volkswagen vehicles. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance for models like the Audi A3 and Volkswagen Golf.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.354-inch diameter for secure installation
• Bore size of 0.875 inches for optimal hydraulic pressure
• Two ports with M12x1 thread size for primary and secondary connections
• Compatible with Audi A3, A3 Quattro, Eos, and Volkswagen Golf, Golf R, GTI, S3

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 standards. This product line emphasizes precision engineering and material quality, such as the aluminum master cylinder body found in part number MC391231, to provide consistent brake system performance and durability for European vehicles.

Detailed Product Description

This brake master cylinder features a robust aluminum body that resists corrosion and reduces weight compared to traditional cast iron units. The 0.875-inch bore size is designed to maintain proper hydraulic pressure, ensuring responsive brake pedal feel. With two mounting holes sized at 0.354 inches in diameter, installation aligns precisely with factory specifications. The dual ports, both threaded M12x1, accommodate standard brake line fittings for secure fluid transfer. This master cylinder is engineered specifically for Audi and Volkswagen models including the A3, A3 Quattro, Eos, Golf, Golf R, GTI, and S3, making it a direct replacement part for these vehicles.

Common Applications and Issues Addressed

• Restores brake hydraulic pressure for improved pedal response
• Replaces worn or leaking master cylinders causing brake fluid loss
• Eliminates spongy or inconsistent brake pedal feel
• Addresses brake system failure due to internal seal wear
• Ensures proper brake fluid distribution to front and rear circuits

Installation Notes and Tips

• Verify compatibility with your specific Audi or Volkswagen model before installation
• Ensure mounting holes align with factory locations for secure fit
• Use appropriate brake fluid and bleed the system thoroughly after installation
• Inspect brake lines and fittings for wear or damage during replacement
• Follow manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet stringent quality standards, using durable aluminum materials and precise machining. While specific warranty details for part number MC391231 should be confirmed at the point of purchase, Raybestos products typically come with a limited warranty covering defects in materials and workmanship to ensure reliability and customer confidence.