Dorman M390377 Brake Master Cylinder

Reliable Brake Master Cylinder for Chrysler, Dodge, and Plymouth

The Dorman M390377 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Chrysler, Dodge, and Plymouth vehicles. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter of 0.938 inches for accurate hydraulic control
• Constructed from durable aluminum material for corrosion resistance and longevity
• Includes reservoir and sensor for integrated brake fluid management
• Equipped with two outlets featuring M12 x 1.0 thread pitch for secure connections
• Compatible with Chrysler Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Town & Country, and Voyager models

Product Details and Specifications

The Dorman M390377 master cylinder features a 0.938-inch bore diameter, providing precise hydraulic pressure modulation essential for brake system performance. Its aluminum construction offers strength and resistance to corrosion, extending the service life of the component. This unit comes complete with an integrated reservoir and sensor, facilitating accurate fluid level monitoring and brake system feedback. The master cylinder includes two outlets, both with M12 x 1.0 thread pitch, ensuring compatibility with factory brake lines and fittings. This part is designed specifically for use in Chrysler Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Town & Country, and Voyager vehicles, making it a direct replacement for worn or damaged master cylinders in these models.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake warning light activation due to faulty sensor or reservoir issues
• Eliminates inconsistent braking caused by internal master cylinder wear
• Improves overall brake system reliability and safety in compatible Chrysler, Dodge, and Plymouth models

Installation Notes and Tips

Installation of the Dorman M390377 master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. It is important to verify thread compatibility with existing brake lines, as this unit uses M12 x 1.0 outlets. Since mounting hardware is not included, retain original mounting components or source appropriate replacements. Follow manufacturer torque specifications and safety procedures during installation to maintain brake system integrity.

Quality Assurance and Warranty Information

Dorman manufactures the M390377 master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable performance under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components. Consult product documentation or authorized sources for exact warranty terms.