Dorman M630138 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Lexus RX300

The Dorman M630138 brake master cylinder is designed specifically for the Lexus RX300, providing reliable brake hydraulics performance. This aluminum master cylinder features a 1-inch bore diameter and is engineered to meet the demands of your vehicle's braking system.

• Compatible with Lexus RX300 models
• Master cylinder bore diameter: 1 inch
• Constructed from durable aluminum material
• Includes two outlets with M12 x 1.0 thread size
• Does not include reservoir, sensor, or mounting hardware
• Package contains the master cylinder only

Detailed Product Description

The Dorman M630138 brake master cylinder is a precision-engineered component made from aluminum to ensure strength and corrosion resistance. It features a 1-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. This master cylinder includes two outlets, both with M12 x 1.0 thread pitch, designed for secure and leak-free connections to the brake lines. Note that this part does not come with a reservoir or sensor, and mounting hardware is not included, so these components must be sourced separately if needed.

Applications and Common Issues Addressed

• Restores proper brake pedal feel and responsiveness on Lexus RX300
• Replaces worn or leaking master cylinders causing brake fluid loss
• Solves issues related to inconsistent hydraulic pressure in brake lines
• Addresses brake system failures due to internal cylinder wear or damage
• Improves overall braking system reliability and safety

Installation Notes and Tips

• Ensure compatibility with Lexus RX300 before installation
• Brake fluid reservoir and sensors must be transferred or replaced separately
• Bleed the brake system thoroughly after installation to remove air
• Use proper torque specifications for outlet fittings (M12 x 1.0 thread)
• Inspect brake lines and connections for leaks post-installation

Quality Assurance and Warranty Information

Dorman manufactures the M630138 brake master cylinder to meet or exceed OEM standards for fit and function on the Lexus RX300. The aluminum construction provides durability and resistance to corrosion. While mounting hardware and reservoir are not included, the master cylinder itself is backed by Dorman's quality control processes. Please refer to Dorman's official warranty policy for specific coverage details.