Dorman M630363 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan Frontier and Xterra

The Dorman M630363 brake master cylinder is engineered to restore proper brake hydraulics for Nissan Frontier and Xterra models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.

• Master cylinder bore diameter: 1 inch for accurate hydraulic pressure
• Constructed from durable aluminum material
• Includes reservoir for fluid storage
• Equipped with a sensor for brake system monitoring
• Three outlets with rearward outlet sizes M10 x 1.0 and 3/8-24 thread pitch
• Compatible with Nissan Frontier and Xterra brake systems
• Mounting hardware not included

Product Details and Specifications

The Dorman M630363 brake master cylinder is designed specifically for Nissan Frontier and Xterra vehicles, providing a direct replacement for the original part. Its 1-inch bore diameter ensures proper hydraulic pressure for effective braking. Made from aluminum, this master cylinder offers corrosion resistance and durability under demanding conditions. The included reservoir allows for brake fluid storage, while the integrated sensor supports brake system diagnostics and safety features. The unit features three outlets, including rearward outlet sizes with M10 x 1.0 and 3/8-24 thread pitch, ensuring compatibility with the vehicle’s brake lines. Note that mounting hardware is not included with this part.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Replaces leaking or cracked brake fluid reservoir
• Resolves brake warning light issues related to sensor failure
• Addresses inconsistent brake pedal feel or sponginess
• Fixes brake fluid contamination or internal seal failure

Installation Notes and Tips

Installation of the Dorman M630363 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Verify thread pitch and outlet sizes match your vehicle’s brake lines before installation. Since mounting hardware is not included, retain original hardware or source compatible fasteners. It is recommended to inspect brake lines and related components during installation for any signs of wear or damage.

Quality Assurance and Warranty Information

Dorman brake master cylinders are manufactured to meet or exceed OEM specifications for fit, form, and function. The M630363 part undergoes rigorous quality control to ensure reliable operation in Nissan Frontier and Xterra vehicles. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.