Dorman M390195 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Lexus GS300

The Dorman M390195 brake master cylinder is engineered specifically for the Lexus GS300, providing reliable brake hydraulics performance. This aluminum master cylinder includes a reservoir and sensor, designed to meet the precise specifications required for your vehicle's braking system.

• Master cylinder bore diameter: 1.063 inches
• Constructed from durable aluminum 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 thread pitch
• Secondary outlet thread diameter: 10 mm
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M390195 brake master cylinder is designed to restore proper brake hydraulics function in the Lexus GS300. Its 1.063-inch bore diameter ensures consistent hydraulic pressure, while the aluminum construction offers corrosion resistance and long-term durability. The included reservoir allows for efficient brake fluid management, and the integrated sensor supports accurate brake system feedback. Featuring two outlets with precise thread specifications (rearward outlet M10 x 1.0, secondary outlet 10 mm), this master cylinder is engineered to fit seamlessly with the GS300's brake lines.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from the master cylinder reservoir or outlets
• Resolves brake pedal sponginess caused by internal cylinder wear
• Replaces faulty brake fluid level sensor for accurate system alerts
• Addresses inconsistent braking performance related to master cylinder failure

Installation Notes and Tips

• Ensure brake system is properly bled after installation to remove air
• Verify compatibility with Lexus GS300 model year before installation
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Mounting hardware is not included; retain original hardware or source separately
• Inspect brake lines and fittings for wear or damage during replacement

Quality Assurance and Warranty

Dorman manufactures the M390195 brake master cylinder to meet or exceed OEM standards for fit and function on the Lexus GS300. The aluminum construction and integrated sensor contribute to reliable brake system operation. While mounting hardware is not included, the product undergoes quality checks to ensure proper performance. Warranty coverage details should be confirmed with the product documentation or supplier.