Dorman M630774 Brake Master Cylinder

Reliable Brake Master Cylinder for Lexus and Toyota Vehicles

The Dorman M630774 brake master cylinder is engineered to restore proper brake hydraulics in select Lexus and Toyota models. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

Key Features of the Dorman M630774 Brake Master Cylinder

• Constructed from durable aluminum for corrosion resistance and longevity
• Master cylinder bore diameter of 0.75 inches for accurate hydraulic control
• Includes two outlets with a rearward outlet thread size of M10 x 1.0 and a thread pitch of 1.0
• Does not include mounting hardware or reservoir, allowing compatibility with existing components
• Compatible with Lexus Highlander, RX350, RX450h, and RX450hL models

Detailed Product Description

The Dorman M630774 brake master cylinder is a direct replacement part designed specifically for Lexus and Toyota vehicles such as the Highlander, RX350, RX450h, and RX450hL. Manufactured from aluminum, this master cylinder offers a bore diameter of 0.75 inches, which is critical for maintaining proper brake fluid pressure and pedal feel. Featuring two outlets, including a rearward outlet with an M10 x 1.0 thread diameter and a 1.0 thread pitch, this component integrates seamlessly with the brake hydraulic system. Note that this part does not come with a reservoir or mounting hardware, making it suitable for installations where these components are already in place or being replaced separately.

Common Applications and Issues Addressed

• Restores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces master cylinders with internal leaks or worn seals
• Addresses brake system failure due to master cylinder bore wear or damage
• Improves brake responsiveness in Lexus Highlander and RX series models
• Ensures proper hydraulic function in Toyota Highlander brake systems

Installation Notes and Tips

• Verify compatibility with your specific Lexus or Toyota model before installation
• Bleed the brake system thoroughly after installation to remove air and ensure optimal performance
• Use existing reservoir and mounting hardware unless replacements are necessary
• Inspect brake lines and fittings for wear or damage during installation
• Follow manufacturer torque specifications for outlet fittings and mounting bolts

Quality Assurance and Warranty Information

Dorman manufactures the M630774 brake master cylinder to meet or exceed OEM standards for fit, form, and function. While mounting hardware and reservoir are not included, the master cylinder is built from high-quality aluminum to resist corrosion and wear. Please consult Dorman's warranty policy for specific coverage details related to this part number.