Dorman M630302 Brake Master Cylinder

Reliable Brake Master Cylinder for Toyota Sienna

The Dorman M630302 brake master cylinder is engineered to restore proper brake hydraulics in your Toyota Sienna. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Master cylinder bore diameter: 0.75 inches for accurate fluid displacement
• Constructed from durable aluminum material for corrosion resistance
• Includes two outlets with a rearward outlet size of M10 x 1.0 and a thread pitch of 1.0
• Secondary outlet thread diameter measures 10 mm
• Package contains the master cylinder only; reservoir and sensor are not included

Product Details and Specifications

The Dorman M630302 brake master cylinder is specifically designed for Toyota Sienna models, providing a direct replacement for the original component. Its aluminum construction offers a balance of strength and lightweight durability, helping to maintain brake system integrity over time. The 0.75-inch bore diameter is calibrated to deliver precise hydraulic pressure, essential for responsive braking. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder integrates seamlessly with the vehicle's brake lines. Note that this part does not include a reservoir or sensor, so those components must be sourced separately if needed.

Common Applications and Problem Resolution

• Restores brake fluid pressure in Toyota Sienna brake systems
• Replaces master cylinders with worn or damaged bores causing brake failure
• Addresses brake pedal sinking or sponginess due to internal leaks
• Solves issues related to inconsistent brake response or fluid flow
• Suitable for vehicles requiring a master cylinder with specific outlet thread sizes

Installation Notes and Tips

When installing the Dorman M630302 brake master cylinder on your Toyota Sienna, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Since mounting hardware is not included, retain or replace existing fasteners as needed. Verify compatibility with your vehicle’s brake lines, especially the outlet thread sizes (M10 x 1.0) and thread pitch (1.0), to ensure a secure fit. Professional installation is recommended to maintain brake system safety and performance.

Quality Assurance and Warranty

Dorman manufactures the M630302 brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details are not provided here, Dorman products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.