Dorman M390000 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan NX and Sentra

The Dorman M390000 brake master cylinder is engineered to restore proper brake hydraulics in Nissan NX and Sentra models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.

• Master cylinder bore diameter: 0.875 inches for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for fluid storage and sensor for brake system monitoring
• Four outlets with secondary outlet thread diameter of 10 mm and rearward outlet size M10 x 1.0
• Thread pitch of 1.0 for secure fitting
• Mounting hardware not included

Product Details and Specifications

The Dorman M390000 brake master cylinder is designed specifically for Nissan NX and Sentra vehicles, providing a direct replacement for the original part. Its 0.875-inch bore diameter ensures proper hydraulic pressure is maintained throughout the brake system. The aluminum construction offers durability and resistance to corrosion, extending the service life of the component. This master cylinder comes with an integrated reservoir to hold brake fluid and a sensor to monitor brake system status, supporting vehicle safety and performance. Featuring four outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, this part fits precisely with the brake hydraulics system. The thread pitch of 1.0 ensures secure connections during installation.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from the master cylinder reservoir or outlets
• Resolves brake pedal sinking or sponginess caused by internal seal failure
• Replaces faulty brake fluid sensor to maintain accurate system monitoring
• Addresses corrosion-related master cylinder failure in Nissan NX and Sentra models

Installation Notes and Tips

Installation of the Dorman M390000 brake master cylinder requires careful attention to brake system bleeding procedures to remove air and ensure proper hydraulic function. Since mounting hardware is not included, retain original fasteners or acquire compatible hardware before installation. Verify thread pitch and outlet sizes to match vehicle specifications. It is recommended to inspect brake lines and related components during installation for any signs of wear or damage.

Quality Assurance and Warranty

Dorman manufactures the M390000 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system operation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components. Consult product documentation or the manufacturer for exact warranty terms.