Dorman M390204 Brake Master Cylinder

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

The Dorman M390204 Brake Master Cylinder is engineered to restore proper brake hydraulics for Chrysler, Dodge, and Plymouth Neon models. Designed with precision, this master cylinder includes a reservoir and sensor to ensure optimal brake system performance.

• Master cylinder bore diameter: 21 mm for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir and sensor for integrated brake fluid management
• Four outlets with rearward outlet sizes of 7/16-24 and M18 x 1.5 threads
• Secondary outlet thread diameter: two outlets at 7/16-24

Product Details and Specifications

The Dorman M390204 brake master cylinder is designed specifically for Chrysler, Dodge, and Plymouth Neon vehicles, providing a direct replacement for the original component. Its 21 mm bore diameter ensures consistent hydraulic pressure, while the aluminum construction offers strength and resistance to wear and corrosion. The included reservoir and sensor facilitate proper brake fluid monitoring and system feedback. With four outlets, including rearward and secondary outlet thread sizes, this master cylinder supports complex brake line configurations found in these Neon models.

Applications and Common Issues Addressed

• Restores brake hydraulic pressure for Chrysler, Dodge, and Plymouth Neon vehicles
• Replaces master cylinders with worn or damaged bores causing brake failure
• Solves brake fluid leakage issues related to faulty reservoirs or seals
• Addresses sensor malfunctions affecting brake system warning lights
• Supports brake line connections with multiple outlet threads for proper fluid distribution

Installation Notes and Tips

Installation of the Dorman M390204 brake master cylinder requires careful attention to brake line connections, especially given the multiple outlet thread sizes. Ensure all brake lines are properly tightened to the specified 7/16-24 and M18 x 1.5 thread dimensions. Bleed the brake system thoroughly after installation to remove air and verify sensor functionality. This part does not include mounting hardware, so retain original fasteners or source compatible replacements.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for Chrysler, Dodge, and Plymouth Neon vehicles. The aluminum construction and integrated sensor contribute to long-term reliability. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to ensure customer confidence in product durability.