Dorman M390368 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Toyota 4Runner

The Dorman M390368 brake master cylinder is designed specifically for Toyota 4Runner models, providing reliable brake hydraulics performance. This master cylinder features an aluminum construction and includes a reservoir and sensor to ensure proper brake system function.

• Compatible with Toyota 4Runner vehicles
• Master cylinder bore diameter: 1 inch
• Constructed from durable aluminum material
• Includes reservoir and sensor for enhanced functionality
• Two outlets with secondary outlet thread diameter of 10 mm
• Rearward outlet size: M10 x 1.0 with 1.0 thread pitch
• Mounting hardware not included

Detailed Product Description

The Dorman M390368 brake master cylinder is engineered to meet the specific hydraulic requirements of Toyota 4Runner brake systems. Its 1-inch bore diameter allows for precise brake fluid pressure control, while the aluminum material offers corrosion resistance and long-term durability. The included reservoir ensures proper fluid storage and monitoring, and the integrated sensor supports brake system diagnostics. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder facilitates secure and accurate brake line connections. Note that mounting hardware is not included with this part.

Common Applications and Issues Addressed

• Replacement for worn or leaking brake master cylinders on Toyota 4Runner
• Restores proper brake fluid pressure and pedal feel
• Resolves brake fluid leaks from the master cylinder reservoir or outlets
• Addresses brake warning light activation due to faulty sensor or fluid level issues
• Improves overall brake system reliability and safety

Installation Notes and Tips

• Ensure compatibility with your specific Toyota 4Runner model year before installation
• Bleed the brake system thoroughly after installation to remove air
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Inspect brake lines and fittings for wear or damage during installation
• Mounting hardware must be sourced separately as it is not included

Quality Assurance and Warranty

Dorman manufactures the M390368 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the part is backed by Dorman's quality control processes. Please refer to Dorman's official warranty policy for specific coverage details.