Dorman M390318 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan 200SX and Sentra

The Dorman M390318 Brake Master Cylinder is engineered to restore proper brake hydraulics in Nissan 200SX and Sentra models. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

Key Features of the Dorman M390318 Brake Master Cylinder

• Master cylinder bore diameter of 0.875 inches for accurate hydraulic control
• Constructed from durable aluminum material for corrosion resistance and longevity
• Includes an integrated reservoir for brake fluid storage
• Equipped with four outlets to support brake line connections
• Secondary outlet thread diameter of 10 mm with M10 x 1.0 rearward outlet size and 1.0 thread pitch
• Package contains the master cylinder unit; mounting hardware is not included
• Compatible specifically with Nissan 200SX and Sentra models

Detailed Description of the Dorman M390318 Brake Master Cylinder

This brake master cylinder is designed to meet the hydraulic requirements of Nissan 200SX and Sentra vehicles. The aluminum construction provides a lightweight yet robust component that resists corrosion and wear. The 0.875-inch bore diameter allows for precise brake fluid displacement, ensuring consistent pedal feel and braking response. The included reservoir simplifies installation by providing an integrated fluid container, while the four outlet ports accommodate the necessary brake line connections. Thread specifications, including a 10 mm secondary outlet and M10 x 1.0 rearward outlet with a 1.0 thread pitch, ensure compatibility with OEM brake lines.

Common Issues Addressed by This Brake Master Cylinder

• Brake pedal sinking or sponginess due to internal seal failure
• Brake fluid leaks from a worn or damaged master cylinder
• Inconsistent brake pressure affecting stopping performance
• Brake warning light activation related to master cylinder malfunction
• Reduced braking efficiency caused by reservoir or bore damage

Installation Notes and Tips

• Ensure the brake system is properly bled after installation to remove air
• Verify thread compatibility with existing brake lines before installation
• Use appropriate brake fluid as specified by Nissan for 200SX and Sentra models
• Mounting hardware is not included; retain original hardware or source separately
• Inspect related brake components for wear during replacement

Quality Assurance and Warranty Information

Dorman manufactures the M390318 Brake Master Cylinder to meet or exceed OEM standards for fit and function. The aluminum construction and precise machining contribute to reliable performance. While mounting hardware is not included, the product is backed by Dorman's quality control processes. Please refer to Dorman's official warranty policy for specific coverage details.