Dorman M39574 Brake Master Cylinder

Brake Master Cylinder for OE-Style Replacement

The Dorman M39574 brake master cylinder is built for specific vehicle applications where consistent hydraulic pressure and dependable pedal response are required. It is precision-engineered to follow the original master cylinder design, function, and performance, using new cast iron construction and quality materials for a durable replacement.

Compatible With select vehicle years, makes, and models, this brake master cylinder is a direct-fit hydraulic component for brake system service on applications such as Ford and Mercury vehicles. The Dorman M39574 is also a practical choice when replacing a worn or leaking master cylinder on a Ford F-150 or similar OE-equipped brake system.

Key Features

• OE-style brake master cylinder replacement for specific applications
• Cast iron master cylinder body for strength and durability
• 2-inch bore diameter for hydraulic system compatibility
• Reservoir included for a complete master cylinder assembly
• Sensor included for applications that use a master cylinder sensor
• Two outlet ports with rearward outlet size 9/16-18 and secondary outlet thread diameter 0.5
• Part number M39574 for easy identification and ordering

Detailed Product Overview

This brake master cylinder is designed to match the original unit’s design and operating characteristics on the listed vehicle applications. It uses new materials rather than remanufactured components, and the cast iron construction supports long-term service in demanding brake hydraulic systems. The included reservoir and sensor help simplify replacement on vehicles that require those components as part of the master cylinder assembly. Cross-reference part numbers include Raybestos Brakes MC39574 and Centric Parts 130.79021 for the same application.

Common Brake System Issues It May Address

• Soft or inconsistent brake pedal feel
• Brake fluid leakage at the master cylinder
• Internal hydraulic bypass causing reduced braking performance
• Warning light concerns related to a master cylinder sensor
• Loss of braking pressure from a worn OE master cylinder

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and brake system configuration before installation. Bench bleeding the master cylinder before mounting can help reduce trapped air in the hydraulic circuit. Inspect brake lines, fittings, and the booster interface during replacement, and confirm the outlet thread sizes match the original system. This part number M39574 is commonly searched for Ford F-150 brake master cylinder replacement and Mercury brake hydraulic service, so matching the original application details is important.

Quality Assurance

Dorman manufactures this master cylinder as a precision replacement for specific OE applications, using new high-quality materials and a cast iron housing to support safe, durable brake system service. The design is intended to replicate the original master cylinder’s function and performance on the correct vehicle applications.