OE Quality
60-Day Returns

Raybestos MC391504 Brake Master Cylinder
Overview of Raybestos Element3; New Brake Master Cylinder MC391504
The Raybestos Element3; New Brake Master Cylinder MC391504 is designed specifically for Honda Civic models, providing reliable brake hydraulics performance. This aluminum master cylinder features precise engineering to ensure consistent braking response and durability.
- Compatible with Honda Civic models
- Constructed from durable aluminum material
- Two mounting holes with 0.362 inch diameter
- Bore size of 0.750 inches for optimal fluid displacement
- Two ports with M12x1 thread size for secure brake line connections
Detailed Product Features and Specifications
The MC391504 brake master cylinder is crafted from aluminum, offering a balance of strength and corrosion resistance essential for brake hydraulics. It includes two mounting holes, each with a diameter of 0.362 inches, ensuring a secure fit during installation. The bore size of 0.750 inches is designed to provide the correct fluid pressure for the braking system. Additionally, the master cylinder has two ports, both featuring M12x1 threading, which facilitates proper brake line attachment and fluid flow.
About the Raybestos Element3; New Product Line
The Element3; New line by Raybestos focuses on delivering reliable brake components engineered to meet or exceed OEM specifications. This product line emphasizes material quality and precise fitment, making it suitable for vehicles like the Honda Civic that require dependable brake hydraulics parts. The MC391504 master cylinder is part of this line, ensuring compatibility and performance consistency.
Common Applications and Problem Resolution
- Replacement for worn or leaking brake master cylinders on Honda Civic
- Restores proper brake pedal feel and hydraulic pressure
- Addresses brake fluid leaks caused by damaged ports or seals
- Solves issues related to inconsistent braking response
- Prevents brake system failure due to master cylinder wear
Installation Notes and Tips
When installing the Raybestos MC391504 brake master cylinder, ensure the mounting holes align correctly with the vehicle’s brake booster or firewall. Use the specified 0.362 inch diameter mounting holes for secure attachment. Properly thread brake lines into the M12x1 ports to avoid leaks. Bleed the brake system thoroughly after installation to remove air and restore optimal brake performance.
Quality Assurance and Warranty
Raybestos manufactures the MC391504 brake master cylinder to meet stringent quality standards. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details are not provided here, Raybestos products typically come with a limited warranty covering defects in materials and workmanship.
| Brand | Raybestos |
|---|---|
| Part Number | MC391504 |
| Position | Element3; New, N/A |
| Bore Size | 0.750 |
| Master Cylinder Material | Aluminum |
| Mounting Hole Diameter | 0.362 |
| Mounting Hole Quantity | 2 |
| Number of Ports | 2 |
| Primary Port Thread A | M12x1 |
| Secondary Port Thread A | M12x1 |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2012 | Honda | Civic | LX | N/A | Compatible with vehicles built in Japan.; Element3; New |
| 2012 | Honda | Civic | EX | N/A | Compatible with vehicles built in Japan.; Element3; New |
| 2012 | Honda | Civic | EX-L | N/A | Compatible with vehicles built in Japan.; Element3; 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.