HomeBrake > Brake HydraulicsDorman M630301 Brake Master Cylinder
Part #: M630301

Dorman M630301 Brake Master Cylinder

⚙️ 6 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Toyota, Prius
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Reliable Brake Master Cylinder for Toyota Prius

The Dorman M630301 brake master cylinder is engineered to restore proper brake hydraulics in your Toyota Prius. 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 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 M630301 brake master cylinder is specifically designed for Toyota Prius models, providing a direct replacement for the original component. Its aluminum construction offers enhanced durability and resistance to wear compared to traditional materials. The 0.75-inch bore diameter ensures proper hydraulic pressure is maintained within the brake system. Featuring two outlets, including a rearward outlet with M10 x 1.0 thread size and a secondary outlet thread diameter of 10 mm, this master cylinder integrates seamlessly with the existing 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 Prius brake systems
  • Addresses issues with spongy or unresponsive brake pedals
  • Replaces leaking or damaged master cylinders causing brake fluid loss
  • Eliminates inconsistent braking performance due to worn internal components
  • Prevents brake system failure related to master cylinder malfunction

Installation Notes and Tips

When installing the Dorman M630301 brake master cylinder on your Toyota Prius, ensure the brake fluid reservoir and sensors are compatible and properly connected, as these are not included with the part. Bleed the brake system thoroughly after installation to remove air and restore optimal hydraulic pressure. Verify thread sizes and outlet connections match your vehicle’s specifications to avoid leaks or improper fitment.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides long-lasting durability under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics products to cover defects in materials and workmanship.

BrandDorman
Part NumberM630301
Mounting Hardware IncludedNo
Master Cylinder Bore Diameter0.75
Master Cylinder MaterialAluminum
Reservoir IncludedNo
Secondary Outlet Thread Diameter10
Sensor IncludedNo
Number of Outlets2
Package ContentsMaster cylinder
Rearward Outlet SizeM10 x 1.0
Thread Pitch1.0

This part fits 6 vehicles. Search below:

YearMakeModelPositionNotes
2009ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.
2008ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.
2007ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.
2006ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.
2005ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.
2004ToyotaPriusN/AFits vehicles with a 3/4 inch bore size.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

11-340013-4299130.44504140634720147040F142632MC390872

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.