HomeBrake > Brake HydraulicsDorman M630841 Brake Master Cylinder
Part #: M630841

Dorman M630841 Brake Master Cylinder

⚙️ 18 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Honda, Civic
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Reliable Brake Master Cylinder for Honda Civic

The Dorman M630841 brake master cylinder is designed specifically for Honda Civic models, providing a precise fit and dependable performance. Crafted from durable aluminum, this master cylinder includes a removable reservoir to support your vehicle's brake hydraulics system effectively.

  • Master cylinder bore diameter: 0.75 inches for accurate hydraulic pressure
  • Constructed from lightweight, corrosion-resistant aluminum
  • Includes a removable reservoir for easy maintenance
  • Equipped with two outlets featuring M12 x 1.0 thread size
  • Compatible with Honda Civic brake hydraulic systems

Product Details and Specifications

The Dorman M630841 brake master cylinder is engineered to meet the specific requirements of Honda Civic brake hydraulics. Its aluminum construction ensures resistance to corrosion and heat, contributing to long-term durability. The 0.75-inch bore diameter is calibrated to deliver consistent hydraulic pressure, essential for safe braking performance. This master cylinder comes with a removable reservoir, allowing for straightforward fluid inspection and replacement. Featuring two outlets with M12 x 1.0 thread pitch, it integrates seamlessly with the vehicle's brake lines. Note that mounting hardware is not included.

Compatible Applications and Common Uses

  • Replacement for worn or leaking brake master cylinders on Honda Civic models
  • Restores proper brake fluid pressure and pedal feel
  • Addresses issues such as brake fluid leaks or spongy brake pedal
  • Helps resolve brake system failure due to master cylinder wear
  • Supports brake system maintenance and rebuild projects

Installation Notes and Tips

When installing the Dorman M630841 brake master cylinder, ensure the brake fluid reservoir is properly seated and securely connected. Bleed the brake system thoroughly to remove air and restore optimal hydraulic pressure. Verify that the M12 x 1.0 outlet threads are compatible with your brake lines. Since mounting hardware is not included, retain original fasteners or acquire appropriate replacements. Follow all manufacturer guidelines for brake system servicing to maintain safety and performance.

Quality Assurance and Warranty

Dorman manufactures the M630841 brake master cylinder to meet or exceed OEM standards for fit and function on Honda Civic vehicles. The aluminum construction and precise bore diameter contribute to reliable brake system operation. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.

BrandDorman
Part NumberM630841
Mounting Hardware IncludedNo
Master Cylinder Bore Diameter0.75
Master Cylinder MaterialAluminum
Reservoir IncludedYes
Sensor IncludedNo
Number of Outlets2
Package ContentsMaster cylinder
Rearward Outlet SizeM12 x 1.0
Reservoir TypeRemovable
Secondary Outlet Thread DiameterM12 x 1.0
Thread Pitch1.0

This part fits 18 vehicles. Search below:

YearMakeModelSubmodelTransmissionPositionNotes
2015HondaCivicLXManualN/A
2015HondaCivicNatural GasN/A
2015HondaCivicHFN/A
2014HondaCivicLXManualN/A
2014HondaCivicNatural GasN/A
2014HondaCivicHFN/A
2013HondaCivicLXN/A
2013HondaCivicEXN/A
2013HondaCivicEX-LN/A
2013HondaCivicNatural GasN/A
2013HondaCivicDXN/A
2013HondaCivicHFN/A
2012HondaCivicLXN/A
2012HondaCivicEXN/A
2012HondaCivicEX-LN/A
2012HondaCivicGXN/A
2012HondaCivicDXN/A
2012HondaCivicHFN/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:

11456513-4565130.4008246100TR0A01MC391461

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