Dorman M630153 Brake Master Cylinder

Reliable Brake Master Cylinder for Audi and Volkswagen Models

The Dorman M630153 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Audi and Volkswagen vehicles. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter: 1 inch for accurate fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes two outlets with M12 x 1.0 thread size for secure brake line connections
• Does not include reservoir or sensor, designed for direct replacement
• Compatible with multiple Audi and Volkswagen models including A4, A6, A8, Passat, S4, and S8

Product Details and Specifications

The Dorman M630153 brake master cylinder features a 1-inch bore diameter, which is critical for maintaining the correct hydraulic pressure within the brake system. Its aluminum construction offers a balance of strength and corrosion resistance, suitable for long-term use in brake hydraulics. This master cylinder is designed with two outlets, both featuring M12 x 1.0 thread pitch, ensuring compatibility with factory brake lines. Note that this unit does not come with a reservoir or sensor, making it ideal for applications where the original reservoir and sensor are retained.

Compatible Vehicles and Applications

This brake master cylinder is compatible with a range of Audi and Volkswagen vehicles, including:

• Audi A4 and A4 Quattro
• Audi A6 and A6 Quattro
• Audi A8 and A8 Quattro
• Volkswagen Passat
• Audi S4 and S8

It is designed to meet the specifications required for these models, ensuring proper fit and function when replacing the original brake master cylinder.

Common Issues Addressed by This Master Cylinder

• Brake pedal feels spongy or sinks to the floor
• Brake fluid leaks from the master cylinder area
• Reduced braking performance or inconsistent brake pressure
• Brake warning light illuminated due to hydraulic issues
• Master cylinder failure causing brake system malfunction

Installation Notes and Tips

When installing the Dorman M630153 master cylinder, ensure the brake system is properly bled to remove any air pockets. Since this unit does not include mounting hardware, reuse the original fasteners or acquire appropriate replacements. Verify that the brake lines match the M12 x 1.0 thread size for a secure connection. It is recommended to inspect the brake fluid reservoir and sensors for any damage before installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance for brake hydraulic repairs. While specific warranty details for part number M630153 should be confirmed at the time of purchase, Dorman typically offers limited warranties covering defects in material and workmanship.