Dorman M390299 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford, Lincoln, and Mercury

The Dorman M390299 brake master cylinder is engineered to restore proper brake hydraulics in Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models. 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 integrated functionality
• Three outlet ports with specific thread sizes: M10 x 1.0 & 3/8-24 rearward outlet, M18 x 1.0 secondary outlet
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M390299 brake master cylinder is crafted from aluminum, providing a lightweight yet sturdy component for your vehicle's brake hydraulics. Its 1-inch bore diameter is designed to match the original equipment specifications for Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models. This master cylinder comes complete with an integrated reservoir and sensor, allowing for seamless monitoring and fluid management within the brake system. Featuring three outlets, including a rearward outlet sized M10 x 1.0 and 3/8-24, as well as a secondary outlet with M18 x 1.0 thread diameter, it ensures compatibility with the brake lines of the specified vehicles.

Compatible Vehicles and Applications

This brake master cylinder is compatible with the following vehicles:

• Ford Crown Victoria
• Lincoln Town Car
• Mercury Grand Marquis

It is designed to replace the original master cylinder in these models, restoring brake hydraulic pressure and improving overall braking response.

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Brake fluid leaks around the master cylinder area
• Inconsistent brake pressure affecting stopping performance
• Warning lights triggered by faulty brake fluid sensors
• Brake system failure caused by worn or damaged master cylinder components

Installation Notes and Tips

• Ensure the brake system is properly bled after installation to remove air pockets
• Verify compatibility with your vehicle’s brake line fittings using the outlet thread sizes
• Mounting hardware is not included; reuse existing hardware or source separately
• Handle the sensor connection carefully to avoid damage during installation
• Consult the vehicle’s service manual for torque specifications and installation procedures

Quality Assurance and Warranty

Dorman manufactures the M390299 brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction offers corrosion resistance and durability under normal operating conditions. This part includes a sensor and reservoir to maintain system integrity. While mounting hardware is not included, the product is backed by Dorman’s quality control processes. Please refer to Dorman’s official warranty policy for specific coverage details.