Dorman M390309 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford Mustang

The Dorman M390309 brake master cylinder is engineered to restore proper brake hydraulics in your Ford Mustang. Designed with precision, this master cylinder includes a reservoir and sensor to ensure optimal brake system performance.

• Master cylinder bore diameter: 1 inch
• Constructed from durable aluminum material
• Includes reservoir and sensor for accurate brake fluid monitoring
• Two outlets with M12 x 1.0 thread size for rearward and secondary connections
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390309 brake master cylinder is specifically designed for Ford Mustang models, providing a precise fit and reliable operation. Its 1-inch bore diameter ensures consistent hydraulic pressure, while the aluminum construction offers corrosion resistance and long-lasting durability. The included reservoir allows for proper brake fluid storage, and the integrated sensor helps monitor fluid levels to maintain brake system safety. Featuring two outlets with M12 x 1.0 thread pitch, this master cylinder supports standard brake line connections for efficient fluid distribution.

Applications and Problem Resolution

This brake master cylinder is used to replace worn or damaged units in Ford Mustang brake systems. It addresses several common issues, including:

• Spongy or unresponsive brake pedal feel
• Brake fluid leaks from the master cylinder
• Brake warning light activation due to sensor faults
• Reduced hydraulic pressure affecting braking performance
• Contaminated or deteriorated internal components causing brake failure

Installation Notes and Tips

Installation of the Dorman M390309 master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Note that mounting hardware is not included, so existing hardware should be inspected and replaced if necessary. Verify thread sizes (M12 x 1.0) for brake line compatibility before installation. It is recommended to consult the vehicle’s service manual for torque specifications and installation procedures.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction and integrated sensor contribute to reliable brake system operation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. Refer to official Dorman documentation for complete warranty information.