Dorman M630137 Brake Master Cylinder

Reliable Brake Master Cylinder for Lexus RX300

The Dorman M630137 brake master cylinder is designed specifically for the Lexus RX300, providing a durable and precise hydraulic braking solution. Crafted from cast iron, this master cylinder ensures consistent performance and longevity for your vehicle's brake system.

• Compatible with Lexus RX300 models
• Constructed from durable cast iron material
• Includes master cylinder and bleeder kit
• Features a 1-inch bore diameter for optimal hydraulic pressure
• Equipped with two mounting holes for secure installation
• Remote reservoir type with two outlets and M10 x 1.0 rearward outlet size

Durable Cast Iron Construction and Precise Specifications

The Dorman M630137 brake master cylinder is engineered with a cast iron body to withstand the rigors of daily driving and maintain brake system integrity. It features a 1-inch bore diameter, which is critical for generating the correct hydraulic pressure needed for effective braking. The unit includes two outlets, with a secondary outlet thread diameter of 0.5 inches and a rearward outlet size of M10 x 1.0, ensuring compatibility with the Lexus RX300's brake hydraulics. This master cylinder comes with a remote reservoir type, allowing for flexible installation options within the engine bay.

Common Brake System Issues Addressed

• Brake pedal sinking or sponginess due to master cylinder wear
• Brake fluid leaks from a failing master cylinder
• Reduced braking efficiency or uneven brake pressure
• Brake warning light activation related to hydraulic faults
• Inconsistent brake pedal feel or delayed brake response

Installation Notes and Tips

When installing the Dorman M630137 brake master cylinder on a Lexus RX300, ensure the brake system is properly bled using the included bleeder kit to remove air and maintain hydraulic integrity. Note that mounting hardware, brake booster, reservoir, push rod, and sensors are not included and may need to be reused from the original assembly. Verify the two mounting holes align correctly with the vehicle's brake booster or firewall mounting points. Proper torque specifications should be followed to avoid leaks or component damage.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability and resistance to wear. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Always consult product documentation or the manufacturer for exact warranty terms.