Dorman M630048 Brake Master Cylinder

Reliable Brake Master Cylinder for Volkswagen Models

The Dorman M630048 brake master cylinder is engineered to restore proper brake hydraulics in select Volkswagen vehicles. Designed specifically for Volkswagen Cabrio, Golf, Jetta, and Passat models, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter: 24 mm for precise hydraulic control
• Constructed from durable cast iron for long-lasting strength
• Includes two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Does not include reservoir or mounting hardware, allowing compatibility with existing components
• Part number M630048 ensures exact fitment for Volkswagen Cabrio, Golf, Jetta, and Passat

Technical Details and Construction

This Dorman brake master cylinder features a 24 mm bore diameter, which is critical for maintaining the correct hydraulic pressure within the brake system. The cast iron construction provides durability and resistance to wear under high-pressure conditions. It includes two outlets, with the secondary outlet thread diameter measuring 10 mm and a rearward outlet size of M10 x 1.0, matching factory specifications for the compatible Volkswagen models. The thread pitch of 1.0 ensures secure and leak-free connections with brake lines.

Compatible Volkswagen Models and Applications

The M630048 master cylinder is compatible with a range of Volkswagen vehicles, including the Cabrio, Golf, Jetta, and Passat. This part is designed to replace the original brake master cylinder in these models, restoring proper brake fluid distribution and pedal feel.

• Restores brake fluid pressure for improved braking response
• Addresses issues such as spongy brake pedal or brake fluid leaks
• Resolves brake system failure caused by worn or damaged master cylinder
• Eliminates inconsistent brake pedal travel or sinking pedal problems

Installation Notes and Tips

Installation of the Dorman M630048 brake master cylinder requires removal of the old master cylinder and proper connection of brake lines to the two outlets. Since mounting hardware and reservoir are not included, reuse existing components or source separately as needed. Ensure all connections are tightened to manufacturer torque specifications and bleed the brake system thoroughly to remove air and restore proper hydraulic function.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The M630048 brake master cylinder undergoes rigorous quality control to ensure reliability and durability. Please refer to Dorman's warranty policy for specific coverage details.