Dorman M630125 Brake Master Cylinder

Dorman M630125 Brake Master Cylinder

The Dorman M630125 brake master cylinder is a direct replacement for specific Toyota Sienna applications. Built with a 1-inch bore and an aluminum body, it is engineered to match the original master cylinder’s design, function, and performance for 2001-2002 Toyota Sienna models with stability control.

Key Features

• Direct replacement brake master cylinder for select Toyota Sienna vehicles
• 1-inch master cylinder bore diameter
• Aluminum master cylinder construction
• Two outlet ports with M12 x 1.0 thread size
• Reservoir not included
• Sensor not included
• Package contents: master cylinder only

Detailed Description

Dorman M630125 is built for 2001-2002 Toyota Sienna brake hydraulic service where the original master cylinder has worn, leaked, or lost hydraulic performance. This unit uses a 1-inch bore and two M12 x 1.0 outlets to match the OE-style layout on the listed vehicles. The aluminum construction supports durable service in a critical braking system application. This part cross-references Cardone New 13-2979 for the same application.

What It Helps Address

• Brake pedal that sinks or feels inconsistent
• External brake fluid leakage at the master cylinder
• Loss of hydraulic pressure in the brake system
• Brake warning concerns tied to master cylinder wear
• Restoration of braking response on a 2001-2002 Toyota Sienna

Installation Notes and Tips

Verify bore size, outlet thread size, and vehicle fitment before installation. This master cylinder does not include mounting hardware, a reservoir, or a sensor, so reuse or source the required related components as needed. After installation, bleed the brake system thoroughly and confirm a firm pedal before returning the vehicle to service. Fits 2001-2002 Toyota Sienna, N/A, with stability control.

Quality Assurance

Dorman manufactures this brake master cylinder as a precision-engineered replacement built from new, high-quality materials. It is intended to match the original part’s design and performance for the listed Toyota Sienna applications. Part number M630125 is also referenced in OE-style replacement catalogs for this vehicle fitment.