Dorman M390123 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford and Mazda Vehicles

The Dorman M390123 brake master cylinder is engineered to restore proper brake hydraulics in select Ford and Mazda models. Designed with a cast iron body and integrated reservoir, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.

• Master cylinder bore diameter: 0.938 inches for precise hydraulic control
• Durable cast iron construction for long-lasting service
• Includes reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Compatible with Ford 626, Mazda MX-6, and Ford Probe models

Product Details and Specifications

The Dorman M390123 brake master cylinder features a cast iron material that provides strength and resistance to wear under high pressure. Its 0.938-inch bore diameter is designed to deliver consistent hydraulic pressure to the brake system. The included reservoir allows for proper brake fluid containment and circulation. This master cylinder has two outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, ensuring compatibility with the brake lines of the specified vehicles. Additionally, the integrated sensor helps monitor brake fluid levels or pressure, contributing to vehicle safety.

Compatible Vehicles and Applications

• Ford 626 models requiring a replacement brake master cylinder
• Mazda MX-6 vehicles needing brake hydraulic system repair
• Ford Probe models with compatible brake master cylinder specifications
• Ideal for addressing brake fluid leaks, spongy brake pedal feel, or loss of braking power
• Suitable for restoring brake system responsiveness and safety

Installation Notes and Tips

Installation of the Dorman M390123 brake master cylinder requires careful attention to brake hydraulic system procedures. Ensure the brake fluid reservoir is properly filled and free of contaminants before installation. Bleed the brake system thoroughly after replacement to remove air and restore proper brake pedal feel. Note that mounting hardware is not included, so retain or source the necessary bolts and fittings. Verify thread sizes and outlet connections to match vehicle specifications for a secure fit.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the product is supplied with the master cylinder and reservoir assembly. Warranty coverage details should be confirmed with the distributor or manufacturer to ensure protection against defects.