Dorman M390448 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M390448

The Dorman Brake Master Cylinder M390448 is designed specifically for Ford Escort and Mercury Tracer models. This brake hydraulics component features a durable aluminum construction and includes a reservoir and sensor to ensure reliable brake system performance.

• Master cylinder bore diameter: 0.938 inches
• Constructed from aluminum for strength and corrosion resistance
• Includes reservoir for brake fluid
• Equipped with a sensor for brake system monitoring
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter: 10 mm
• Mounting hardware not included

Detailed Product Description

The Dorman M390448 brake master cylinder is engineered to meet the specifications of Ford Escort and Mercury Tracer vehicles. Its 0.938-inch bore diameter provides precise hydraulic pressure control, essential for effective braking. Made from aluminum, this master cylinder offers durability and resistance to corrosion, extending the service life of the brake system. The included reservoir allows for proper brake fluid storage, while the integrated sensor supports brake system diagnostics and safety features. With two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet thread diameter of 10 mm, this master cylinder ensures compatibility with the vehicle’s brake lines. Note that mounting hardware is not included, so existing hardware should be inspected or replaced as needed during installation.

Common Applications and Issues Addressed

• Restores proper hydraulic pressure in the brake system
• Replaces worn or leaking master cylinders causing brake fluid loss
• Resolves brake pedal sinking or sponginess due to internal seal failure
• Supports brake system sensor functionality for warning light operation
• Addresses corrosion-related master cylinder failures in Ford Escort and Mercury Tracer models

Installation Notes and Tips

• Compatible with Ford Escort and Mercury Tracer vehicles; verify model year and specifications before installation
• Ensure brake fluid reservoir is properly filled and free of contaminants
• Bleed the brake system thoroughly after installation to remove air
• Inspect existing mounting hardware and replace if worn, as it is not included with this part
• Check sensor connections for proper operation after installation

Quality Assurance and Warranty

Dorman manufactures the M390448 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 mounting hardware is not included, the part is designed for direct replacement in compatible Ford Escort and Mercury Tracer models. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.