Dorman M39801 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement for Your Vehicle

The Dorman M39801 Brake Master Cylinder is engineered to restore proper brake hydraulics in select vehicles. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake fluid management and system monitoring.

• Master cylinder bore diameter of 0.875 inches for accurate hydraulic pressure
• Durable aluminum construction for corrosion resistance and longevity
• Includes reservoir for brake fluid storage
• Equipped with a sensor for brake system monitoring
• Two outlets 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 M39801 Brake Master Cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Its 0.875-inch bore diameter ensures precise fluid displacement, while the aluminum material offers resistance to rust and wear. The included reservoir allows for proper brake fluid containment, and the integrated sensor provides real-time feedback to the vehicle’s brake system. Featuring two outlets with a rearward outlet size of M10 x 1.0 and a secondary outlet thread diameter of 10 mm, this master cylinder is designed to meet specific OEM specifications. Note that mounting hardware is not included, so ensure compatibility with your vehicle’s existing setup.

Common Applications and Issues Addressed

• Restores brake pedal firmness and responsiveness
• Eliminates brake fluid leaks from a worn or damaged master cylinder
• Resolves brake warning light activation due to sensor faults
• Corrects inconsistent brake pressure affecting stopping performance
• Replaces master cylinders with corroded or damaged aluminum bodies

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model 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 to maintain brake system monitoring

Quality Assurance and Warranty

Dorman manufactures the M39801 Brake Master Cylinder to meet or exceed OEM standards for fit and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the product undergoes quality checks to ensure durability and proper operation. Please consult Dorman’s warranty policy for specific coverage details.