Dorman M390550 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda Civic

The Dorman M390550 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 braking performance.

• Compatible with Honda Civic models
• Master cylinder bore diameter: 0.938 inches
• Durable aluminum construction
• Includes reservoir and sensor for accurate fluid management
• Two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter 10 mm
• Thread pitch of 1.0 for secure fitting
• Mounting hardware not included

Product Details and Specifications

The Dorman M390550 brake master cylinder is crafted from aluminum, providing a lightweight yet durable component for your Honda Civic's brake hydraulics system. The master cylinder features a bore diameter of 0.938 inches, which is critical for maintaining proper hydraulic pressure. It comes equipped with a reservoir to hold brake fluid and a sensor to monitor fluid levels, helping to maintain safe braking conditions. The unit has two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10 mm thread diameter, both with a thread pitch of 1.0 to ensure a secure and leak-free connection.

Common Applications and Problem Resolution

• Restores brake pressure and pedal feel in Honda Civic brake systems
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses brake warning light issues related to sensor failure
• Fixes spongy or unresponsive brake pedal performance
• Prevents brake system contamination with included reservoir

Installation Notes and Tips

Installation of the Dorman M390550 brake master cylinder requires proper brake fluid handling and bleeding procedures to avoid air in the brake lines. Since mounting hardware is not included, ensure you have the necessary bolts and fittings compatible with your Honda Civic. Verify thread sizes and pitch before installation to guarantee a proper fit. It is recommended to inspect brake lines and related components during replacement to maintain overall system integrity.

Quality Assurance and Warranty

Dorman manufactures the M390550 brake master cylinder to meet or exceed OEM specifications for Honda Civic brake hydraulics. The aluminum construction and integrated sensor contribute to reliable performance and durability. While mounting hardware is not included, the product undergoes quality checks to ensure fit and function. Please refer to Dorman's warranty policy for coverage details on this part.