HomeRaybestos MC390721 Brake Master Cylinder
Part #: MC390721

Raybestos MC390721 Brake Master Cylinder

Element3; New, N/A
8 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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Out of Stock
OE Direct Replacement — Bolt-on fit, no modifications needed
Element3; New, N/A
Fitment: Acura and Honda, RSX and CR-V
Easy Returns — Return within 60 days for a full refund
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Reliable Brake Master Cylinder for Acura and Honda Vehicles

The Raybestos Element3; New Brake Master Cylinder MC390721 is engineered to restore precise brake hydraulics for Acura CR-V and Honda RSX models. Designed with durable aluminum construction and exact fitment specifications, this master cylinder ensures consistent braking performance.

  • Constructed from lightweight, corrosion-resistant aluminum
  • Two mounting holes with 0.354-inch diameter for secure installation
  • 0.938-inch bore size optimized for brake fluid pressure control
  • Two ports with M10x1 thread size for primary and secondary brake lines
  • Compatible with Acura CR-V and Honda RSX models

About the Raybestos Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components with precise engineering and quality materials. This brake master cylinder MC390721 is part of that line, offering a balance of durability and performance tailored for specific vehicle applications such as the Acura CR-V and Honda RSX.

Detailed Product Description

This brake master cylinder features an aluminum body that provides resistance to corrosion and heat, contributing to long service life. The 0.938-inch bore size is designed to maintain proper hydraulic pressure, ensuring effective brake response. With two mounting holes sized at 0.354 inches in diameter, installation is straightforward and secure. The master cylinder includes two ports, both threaded M10x1, to accommodate primary and secondary brake lines, maintaining proper fluid flow and system integrity.

Common Issues Addressed by This Master Cylinder

  • Brake pedal sinking or sponginess due to internal leaks
  • Loss of hydraulic pressure affecting braking efficiency
  • Brake fluid leaks around the master cylinder area
  • Inconsistent brake pedal feel or delayed brake response
  • Replacement of worn or damaged original master cylinder components

Installation Notes and Tips

  • Ensure compatibility with Acura CR-V and Honda RSX models before installation
  • Bleed the brake system thoroughly after installation to remove air
  • Use proper torque specifications for mounting bolts to avoid damage
  • Inspect brake lines and fittings for wear or damage during replacement
  • Follow manufacturer guidelines for brake fluid type and maintenance

Quality Assurance and Warranty

Raybestos manufactures the MC390721 brake master cylinder to meet strict quality standards, using durable aluminum material and precise machining. While specific warranty details should be confirmed at the point of purchase, Raybestos products typically come with coverage against manufacturing defects to ensure reliability and customer confidence.

BrandRaybestos
Part NumberMC390721
PositionElement3; New, N/A
Bore Size0.938
Master Cylinder MaterialAluminum
Mounting Hole Diameter0.354
Mounting Hole Quantity2
Number of Ports2
Primary Port Thread AM10x1
Secondary Port Thread AM10x1

This part fits 8 vehicles. Search below:

YearMakeModelSubmodelPositionNotes
2006AcuraRSXType-SN/AElement3; New
2005AcuraRSXType-SN/AElement3; New
2004AcuraRSXType-SN/AElement3; New
2004HondaCR-VEXN/AElement3; New
2003AcuraRSXType-SN/AElement3; New
2003HondaCR-VEXN/AElement3; New
2002AcuraRSXType-SN/AElement3; New
2002HondaCR-VEXN/AElement3; New

* 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:

072-9438072-953611-317513-317538125446100S6MA5246100SCAA51M4751M55129M630292MC141573MCA630292NM55145

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