Dorman M630921 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan Sentra

The Dorman M630921 brake master cylinder is designed specifically for Nissan Sentra models, providing precise hydraulic control for your vehicle's braking system. This cast iron master cylinder includes a removable reservoir and sensor to ensure optimal performance and safety.

• Cast iron construction for durability and strength
• Includes removable reservoir with sensor for fluid level monitoring
• Master cylinder bore diameter of 0.9375 inches for accurate hydraulic pressure
• Two outlets with M12 x 1.0 thread pitch for secure brake line connections
• Compatible with Nissan Sentra brake hydraulics systems

Product Details and Specifications

The Dorman M630921 brake master cylinder is engineered with a 0.9375-inch bore diameter, ensuring consistent hydraulic pressure for effective braking. Constructed from cast iron, this master cylinder offers long-lasting durability under demanding conditions. It features a removable reservoir that simplifies maintenance and includes a sensor to monitor brake fluid levels, enhancing safety. The unit has two outlets, both with M12 x 1.0 thread pitch, designed for secure and leak-free connections to the brake lines. This part does not include mounting hardware and is intended for direct replacement in Nissan Sentra vehicles.

Common Applications and Problem Resolution

• Restores proper brake fluid pressure for improved braking response
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Fixes brake pedal issues such as sponginess or sinking
• Addresses sensor-related brake fluid level warnings
• Resolves contamination or reservoir damage affecting brake performance

Installation Notes and Tips

Installation of the Dorman M630921 brake master cylinder requires basic mechanical skills and proper brake system knowledge. Ensure the brake fluid reservoir is properly seated and connected to the sensor. Bleed the brake system thoroughly after installation to remove air and restore full hydraulic pressure. Since mounting hardware is not included, retain original fasteners or acquire appropriate replacements. Verify compatibility with your Nissan Sentra model year before installation.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for Nissan Sentra vehicles. The cast iron construction and integrated sensor contribute to reliable operation and safety. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.