Dorman M39968 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda Civic

The Dorman M39968 brake master cylinder is designed specifically for Honda Civic models, providing precise hydraulic control for your vehicle's braking system. Engineered with durable aluminum and equipped with a reservoir and sensor, this master cylinder ensures consistent brake performance.

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

Product Details and Specifications

The Dorman M39968 brake master cylinder features a 0.938-inch bore diameter, crafted from aluminum to provide a balance of strength and weight savings. This part includes a reservoir to hold brake fluid and a sensor to monitor fluid levels, ensuring your Honda Civic's braking system operates efficiently. The master cylinder has two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10mm thread diameter, both designed for precise hydraulic connections. The thread pitch of 1.0 ensures compatibility with OEM brake lines. Note that mounting hardware is not included with this part.

Common Applications and Problem Resolution

• Restores proper brake fluid pressure for improved braking response
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake pedal sinking or sponginess due to internal seal failure
• Resolves brake warning light activation related to sensor issues
• Ensures reliable brake system operation after component wear

Installation Notes and Tips

When installing the Dorman M39968 brake master cylinder on your Honda Civic, ensure the brake fluid reservoir is properly seated and the sensor connector is securely attached. Bleed the brake system thoroughly to remove air and verify all hydraulic connections use the correct thread pitch of 1.0. Since mounting hardware is not included, retain or replace existing hardware as needed. Follow manufacturer torque specifications to avoid leaks or damage.

Quality Assurance and Warranty

Dorman manufactures the M39968 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction offers corrosion resistance and durability under normal operating conditions. This part includes a sensor to maintain system integrity and is backed by Dorman's limited warranty against defects in materials and workmanship.