Dorman M390450 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford Escort and Mercury Tracer

The Dorman M390450 brake master cylinder is designed specifically for Ford Escort and Mercury Tracer models, providing precise hydraulic control for your vehicle's braking system. This aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.

• Master cylinder bore diameter: 0.938 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for fluid storage and sensor for brake system monitoring
• 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 M390450 brake master cylinder is engineered to meet the hydraulic requirements of Ford Escort and Mercury Tracer vehicles. Its 0.938-inch bore diameter ensures proper fluid displacement, while the aluminum construction offers strength and resistance to wear and corrosion. The included reservoir allows for adequate brake fluid storage, and the integrated sensor supports brake system diagnostics. Featuring two outlets with precise thread specifications (M10 x 1.0 rearward outlet and 10 mm secondary outlet), this master cylinder is designed for direct replacement in compatible models.

Compatible Vehicles and Applications

This brake master cylinder is compatible with the following vehicles:

• Ford Escort
• Mercury Tracer

It is intended for use in brake hydraulic systems requiring a master cylinder with the specified bore diameter and outlet thread sizes. The part number M390450 ensures correct fitment and function for these models.

Common Issues Addressed by This Master Cylinder

• Brake pedal sinking or sponginess due to internal leaks
• Brake fluid leaks from a worn or damaged master cylinder
• Brake warning light activation related to sensor failure
• Reduced braking efficiency caused by improper hydraulic pressure
• Contaminated or deteriorated master cylinder components affecting brake response

Installation Notes and Tips

• Ensure brake fluid reservoir is properly filled before installation
• Bleed the brake system thoroughly after replacement to remove air
• Verify thread pitch and outlet sizes match vehicle specifications
• Mounting hardware is not included; reuse existing hardware or acquire separately
• Check sensor connections for proper engagement and function

Quality Assurance and Warranty

Dorman manufactures the M390450 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.