Dorman M390445 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford, Lincoln, and Mercury Vehicles

The Dorman M390445 brake master cylinder is designed specifically for Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models. Engineered with precision, this master cylinder ensures consistent brake performance and safety for your vehicle's hydraulic brake system.

• Master cylinder bore diameter: 1 inch for optimal hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390445 brake master cylinder features a 1-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. Its aluminum construction offers resistance to rust and wear, extending the service life of the component. The included reservoir allows for efficient brake fluid management, while the integrated sensor provides real-time monitoring of brake system conditions. This master cylinder has two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, and a secondary outlet thread diameter of 10 mm, ensuring compatibility with the brake lines on Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis vehicles.

Compatible Vehicles and Applications

• Ford Crown Victoria brake hydraulic system replacement
• Lincoln Town Car brake master cylinder upgrade
• Mercury Grand Marquis brake system repair
• Addresses issues such as brake fluid leaks, spongy brake pedal, and loss of hydraulic pressure
• Restores proper brake pedal feel and braking response

Installation Notes and Tips

Installation of the Dorman M390445 brake master cylinder requires basic mechanical knowledge and proper tools. Note that mounting hardware is not included, so retain original hardware or acquire compatible fasteners. Ensure the brake system is properly bled after installation to remove air and maintain hydraulic integrity. Verify sensor connections are secure to enable accurate brake system monitoring.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.