Dorman M630809 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M630809

The Dorman Brake Master Cylinder M630809 is designed specifically for Mini Cooper models, including the Cooper, Cooper Clubman, Cooper Countryman, and Cooper Paceman. This aluminum master cylinder provides reliable brake hydraulics performance tailored to these vehicles.

• Master cylinder bore diameter: 0.938 inches
• Constructed from durable aluminum material
• Includes two outlets with M12 x 1.0 thread size
• Does not include mounting hardware, reservoir, or sensor
• Package contains the master cylinder only

Detailed Product Description

The Dorman M630809 brake master cylinder is engineered to meet the specific hydraulic requirements of Mini Cooper models such as the Cooper, Cooper Clubman, Cooper Countryman, and Cooper Paceman. Featuring a 0.938-inch bore diameter, this aluminum master cylinder ensures consistent brake fluid pressure for effective braking response. The unit includes two outlets, both with M12 x 1.0 thread pitch, designed for secure and precise brake line connections. Note that this part does not come with a reservoir, sensor, or mounting hardware, so these components must be sourced separately if needed.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure in Mini Cooper brake systems
• Replaces worn or leaking master cylinders causing brake pedal issues
• Solves brake fluid leaks from damaged or corroded master cylinders
• Addresses inconsistent brake pedal feel or sponginess
• Improves overall brake system reliability and safety

Installation Notes and Tips

• Compatible with Mini Cooper, Cooper Clubman, Cooper Countryman, and Cooper Paceman models
• Ensure brake fluid reservoir and sensors are compatible and installed separately
• Bleed brake system thoroughly after installation to remove air
• Verify thread pitch (M12 x 1.0) matches brake line fittings
• Professional installation recommended for safety and performance

Quality Assurance and Warranty

Dorman manufactures the M630809 brake master cylinder with high-quality aluminum for durability and corrosion resistance. While mounting hardware and reservoir are not included, the master cylinder meets OEM specifications for fit and function on Mini Cooper vehicles. Warranty information should be confirmed with the distributor or retailer at the time of purchase.