HomeBrake > Brake HydraulicsDorman M630855 Brake Master Cylinder
Part #: M630855

Dorman M630855 Brake Master Cylinder

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⚙️ 2 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Kia, Soul
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Reliable Brake Master Cylinder for Kia Soul

The Dorman M630855 brake master cylinder is engineered to provide consistent hydraulic pressure for your Kia Soul's braking system. Designed with durable cast iron and precise bore dimensions, this master cylinder ensures dependable performance and safety on the road.

  • Master cylinder bore diameter: 0.875 inches for accurate hydraulic control
  • Constructed from cast iron for long-lasting durability
  • Includes two outlets with M12 x 1.0 thread pitch for secure brake line connections
  • Removable reservoir type (reservoir not included)
  • Package contains the master cylinder only; mounting hardware and sensor are not included

Product Details and Specifications

The Dorman M630855 brake master cylinder is specifically designed for Kia Soul models, ensuring compatibility and proper fitment. Its cast iron construction offers strength and resistance to wear, while the 0.875-inch bore diameter provides precise hydraulic pressure control. The unit features two outlets with M12 x 1.0 thread pitch, suitable for connecting brake lines securely. This master cylinder comes without a reservoir or sensor, allowing for flexible installation with existing components. Note that mounting hardware is not included, so ensure you have the necessary parts for installation.

Common Applications and Problem Resolution

This brake master cylinder is used to regulate brake fluid pressure in the hydraulic braking system of Kia Soul vehicles. It is a critical component for safe and effective braking performance. The Dorman M630855 can help address the following issues:

  • Spongy or unresponsive brake pedal
  • Brake fluid leaks from the master cylinder
  • Reduced braking efficiency or uneven brake pressure
  • Brake warning light activation due to hydraulic failure
  • Master cylinder internal seal wear or failure

Installation Notes and Tips

When installing the Dorman M630855 brake master cylinder on your Kia Soul, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Since mounting hardware and reservoir are not included, verify compatibility with your existing components before installation. Use appropriate tools to avoid damaging the M12 x 1.0 threaded outlets. Follow manufacturer torque specifications for secure fitting.

Quality Assurance and Warranty

Dorman brake master cylinders are manufactured to meet or exceed OEM standards for fit, form, and function. The M630855 part undergoes rigorous quality control to ensure reliable performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.

BrandDorman
Part NumberM630855
Master Cylinder Bore Diameter0.875
Master Cylinder MaterialCast Iron
Mounting Hardware IncludedNo
Number of Outlets2
Package ContentsMaster Cylinder
Rearward Outlet SizeM12 X 1.0
Reservoir IncludedNo
Reservoir TypeRemovable
Secondary Outlet Thread DiameterM12 X 1.0
Sensor IncludedNo
Thread Pitch1.0

This part fits 2 vehicles. Search below:

YearMakeModelPositionNotes
2013KiaSoulN/A
2012KiaSoulN/A

* 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:

130.50054585102K820MC391478

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