Dorman M630836 Brake Master Cylinder

Reliable Brake Master Cylinder for Audi A4, A5, S4, and More

The Dorman M630836 Brake Master Cylinder is engineered to provide consistent hydraulic pressure for your Audi's braking system. Designed specifically for select Audi models including the A4, A5, S4, and S8 Quattro variants, this master cylinder ensures precise brake control and safety.

• Master cylinder bore diameter: 1 inch for optimal hydraulic performance
• 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 mounting hardware, allowing compatibility with existing components
• Package contains the master cylinder only, part number M630836

Technical Details and Compatibility

This Dorman brake master cylinder features a 1-inch bore diameter, which is critical for maintaining proper brake fluid pressure and pedal feel. The aluminum construction offers a balance of strength and lightweight design, reducing corrosion risks common in brake hydraulics. With two outlets threaded M12 x 1.0, it supports dual brake line connections necessary for the hydraulic system in Audi models such as the A4 allroad, A5 Quattro, and S8. Note that this unit does not include a reservoir or sensor, so it is intended for use with existing compatible components.

Applications and Problem Resolution

This master cylinder is compatible with the following Audi models: A4, A4 allroad, A4 Quattro, A5, A5 Quattro, A8 Quattro, allroad, S4, S5, and S8. It is designed to address common brake system issues such as:

• Spongy or unresponsive brake pedal
• Brake fluid leaks from the master cylinder
• Loss of hydraulic pressure affecting braking performance
• Brake warning light activation due to master cylinder failure
• Uneven brake application between front and rear wheels

Installation Notes and Tips

Installation of the Dorman M630836 master cylinder requires removal of the old unit and proper connection to the brake lines using the M12 x 1.0 threaded outlets. Since mounting hardware and reservoir are not included, ensure existing components are compatible and in good condition before installation. Bleeding the brake system thoroughly after installation is essential to remove air and restore proper hydraulic function.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit and function. The aluminum construction provides durability and resistance to corrosion, contributing to long service life. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to ensure customer confidence in product reliability.