Dorman M39404 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M39404

The Dorman Brake Master Cylinder M39404 is designed specifically for Toyota Celica models, providing reliable brake hydraulics performance. This cast iron master cylinder includes a reservoir and sensor, engineered to meet the demands of your vehicle's braking system.

• Master cylinder bore diameter: 0.938 inches
• Constructed from durable cast iron material
• Includes reservoir for fluid storage
• Equipped with a sensor for brake system monitoring
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M39404 brake master cylinder is a critical component in the brake hydraulics system of Toyota Celica vehicles. Its 0.938-inch bore diameter ensures proper hydraulic pressure for effective braking. Manufactured from cast iron, this master cylinder offers strength and durability under demanding conditions. The included reservoir allows for brake fluid storage, while the integrated sensor provides real-time monitoring of brake fluid levels or pressure, enhancing safety and system diagnostics. Featuring two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder is engineered for precise fitment and reliable connection to the brake lines. Note that mounting hardware is not included, so ensure compatibility with your existing setup during installation.

Common Applications and Issues Addressed

• Replacement for worn or leaking brake master cylinders on Toyota Celica models
• Resolves brake fluid leaks caused by damaged reservoirs or seals
• Addresses inconsistent brake pedal feel due to internal cylinder wear
• Fixes brake warning light issues related to faulty brake fluid sensors
• Restores proper hydraulic pressure for safe and responsive braking

Installation Notes and Tips

• Verify compatibility with your Toyota Celica model year before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Inspect brake lines and fittings for wear or damage during replacement
• Ensure sensor connections are secure for accurate brake system monitoring

Quality Assurance and Warranty

Dorman manufactures the M39404 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated sensor contribute to reliable performance and durability. While mounting hardware is not included, the product undergoes quality checks to ensure proper operation. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.