Dorman M390403 Brake Master Cylinder

Reliable Brake Master Cylinder for Honda CR-V

The Dorman M390403 Brake Master Cylinder is engineered to restore proper brake hydraulics for your Honda CR-V. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure optimal braking performance.

• Compatible with Honda CR-V models
• Master cylinder bore diameter: 0.938 inches
• Durable aluminum construction
• Includes reservoir and sensor for accurate fluid management
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter: 10 mm
• Mounting hardware not included

Product Details and Specifications

The Dorman M390403 brake master cylinder is crafted from aluminum, providing a lightweight yet durable component for your vehicle's brake hydraulics system. It features a 0.938-inch bore diameter, which is critical for maintaining proper hydraulic pressure. This master cylinder comes with an integrated reservoir and sensor, allowing for efficient brake fluid monitoring and management. The part includes two outlets, with the rearward outlet sized at M10 x 1.0 and a thread pitch of 1.0, ensuring compatibility with the brake lines on your Honda CR-V. Note that mounting hardware is not included with this part.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from a faulty reservoir or seals
• Resolves brake pedal sinking or sponginess issues
• Replaces malfunctioning brake fluid sensor for accurate warning signals
• Addresses uneven braking caused by hydraulic system failure

Installation Notes and Tips

When installing the Dorman M390403 brake master cylinder on your Honda CR-V, ensure the brake system is properly bled to remove air pockets. Verify that the reservoir is securely attached and the sensor is connected to the vehicle’s electrical system. Since mounting hardware is not included, retain the original hardware or source compatible fasteners. Follow manufacturer torque specifications to avoid damage to the threads and ensure a secure fit.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction offers corrosion resistance and durability under normal operating conditions. This part includes a sensor and reservoir to maintain system integrity. Warranty coverage details should be confirmed with the distributor or retailer, as Dorman typically provides limited warranties on replacement brake components.