Dorman M390328 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda Civic

The Dorman M390328 brake master cylinder is engineered to restore proper brake hydraulics for Honda Civic models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance and safety.

• Master cylinder bore diameter: 0.813 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for fluid storage and management
• Equipped with a sensor to monitor brake system status
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

This Dorman brake master cylinder (part number M390328) is specifically designed for Honda Civic vehicles, ensuring compatibility and reliable fitment. The 0.813-inch bore diameter provides the correct hydraulic pressure needed for effective braking. Made from aluminum, the master cylinder offers resistance to corrosion and wear, extending the service life of your brake system. The included reservoir allows for proper brake fluid containment, while the integrated sensor helps monitor brake fluid levels or system status, contributing to vehicle safety. The unit features two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, and a secondary outlet with a 10 mm thread diameter, facilitating proper brake line connections.

Common Applications and Problem Resolution

• Restores brake hydraulic pressure in Honda Civic brake systems
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake pedal sponginess or failure due to master cylinder wear
• Resolves sensor-related brake warning light issues
• Improves brake system reliability and responsiveness

Installation Notes and Tips

Installation of the Dorman M390328 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. Note that mounting hardware is not included, so retain original fasteners or acquire appropriate replacements. Verify thread sizes and outlet connections to match your Honda Civic brake lines. It is recommended to inspect related brake components during installation for overall system integrity.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for Honda Civic vehicles. The aluminum construction and integrated sensor contribute to long-term durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product reliability.