Dorman M39743 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford and Mazda Vehicles

The Dorman M39743 brake master cylinder is designed to restore proper brake hydraulics in select Ford and Mazda models. Engineered with durable cast iron and featuring a built-in reservoir, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.

• Master cylinder bore diameter: 0.875 inches for precise hydraulic control
• Constructed from cast iron for strength and durability
• Includes reservoir for brake fluid storage
• Two outlet ports with rearward outlet size M10 x 1.0 and 10mm secondary outlet thread diameter
• Thread pitch of 1.0 for secure fitting
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M39743 brake master cylinder is specifically designed for use in Ford 626, Mazda MX-6, and Ford Probe models. Its cast iron construction provides long-lasting resistance to wear and corrosion, while the 0.875-inch bore diameter supports effective brake fluid displacement. The integrated reservoir simplifies installation and maintenance by housing the brake fluid directly on the master cylinder. Featuring two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10mm thread diameter, this part ensures compatibility with the brake lines of the specified vehicles. Note that this master cylinder does not include mounting hardware or sensors.

Common Applications and Problem Resolution

• Restores brake pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake failure issues related to internal cylinder wear or corrosion
• Improves brake system responsiveness in Ford 626, Mazda MX-6, and Ford Probe models
• Eliminates brake fluid contamination by providing a new, sealed reservoir

Installation Notes and Tips

Installation of the Dorman M39743 master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic performance. Since mounting hardware is not included, retain or source compatible fasteners for secure attachment. Verify thread pitch and outlet sizes to match existing brake lines. It is recommended to inspect related brake components during installation to maintain overall system integrity.

Quality Assurance and Warranty Information

Dorman manufactures the M39743 brake master cylinder to meet or exceed OEM specifications for the listed Ford and Mazda models. The cast iron material and precise bore diameter contribute to reliable brake system operation. While mounting hardware and sensors are not included, the product undergoes quality checks to ensure fit and function. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.