Dorman M390275 Brake Master Cylinder

Reliable Brake Master Cylinder for Chrysler, Dodge, and Plymouth Vehicles

The Dorman M390275 brake master cylinder is designed to restore proper brake hydraulics in select Chrysler, Dodge, and Plymouth models. Engineered with an aluminum body and integrated reservoir, this master cylinder ensures consistent brake fluid delivery for safe and responsive braking performance.

• Compatible with Chrysler Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Town & Country, and Voyager models
• Master cylinder bore diameter of 0.938 inches for precise hydraulic pressure
• Durable aluminum construction for corrosion resistance and longevity
• Includes reservoir and sensor for complete brake system integration
• Two outlets with 7/16-24 thread size for rearward and secondary connections
• Part number M390275 for accurate identification and fitment

Product Features and Specifications

This Dorman brake master cylinder features a 0.938-inch bore diameter, which is critical for maintaining the correct hydraulic pressure in the brake system. The aluminum material offers enhanced durability and resistance to corrosion compared to traditional cast iron units. The included reservoir allows for proper brake fluid storage, while the integrated sensor supports brake fluid level monitoring. With two outlets sized at 7/16-24 threads, this master cylinder is designed to connect seamlessly with the brake lines of compatible Chrysler, Dodge, and Plymouth minivans.

Applications and Common Issues Addressed

• Restores brake fluid pressure in Chrysler Caravan and Dodge Grand Caravan brake systems
• Replaces worn or leaking master cylinders in Plymouth Grand Voyager and Town & Country vehicles
• Solves brake pedal sinking or sponginess caused by internal master cylinder failure
• Addresses brake fluid leaks from the master cylinder reservoir or outlets
• Ensures proper brake fluid level sensing with the included sensor

Installation Notes and Tips

Installation of the Dorman M390275 brake master cylinder requires basic brake system knowledge and tools. Before installation, ensure the brake system is depressurized and the vehicle is securely supported. Bleed the brake system thoroughly after installation 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 compatibility with your specific Chrysler, Dodge, or Plymouth model year before installation.

Quality Assurance and Warranty Information

Dorman manufactures this 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 are not provided here, Dorman typically offers limited warranties on their brake hydraulics components. Consult product documentation or the manufacturer for exact warranty terms.