Dorman M390193 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder for Lexus LS400

The Dorman M390193 brake master cylinder is designed specifically for Lexus LS400 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 Lexus LS400 brake hydraulic systems
• Master cylinder bore diameter: 1.063 inches
• Constructed from durable aluminum material
• Includes reservoir and sensor for integrated brake monitoring
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter: 10 mm
• Mounting hardware not included

Detailed Product Description

The Dorman M390193 brake master cylinder is engineered to meet the specifications required for the Lexus LS400 brake hydraulics system. Its aluminum body offers corrosion resistance and strength, ensuring long-term durability under demanding conditions. The included reservoir allows for proper brake fluid storage, while the integrated sensor supports brake system monitoring and safety features. With a bore diameter of 1.063 inches, this master cylinder provides precise hydraulic pressure control. The unit features two outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, and a secondary outlet with a 10 mm thread diameter, facilitating secure brake line connections.

Common Applications and Problem Resolution

• Restores brake hydraulic pressure in Lexus LS400 vehicles
• Replaces master cylinders with worn or damaged bores
• Addresses brake fluid leaks from the master cylinder reservoir
• Resolves brake warning light issues related to sensor failure
• Improves brake pedal feel and responsiveness

Installation Notes and Tips

Installation of the Dorman M390193 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. Note that mounting hardware is not included, so original or compatible fasteners must be used. Verify thread sizes and outlet connections to match the vehicle’s brake lines. It is recommended to inspect brake lines and related components during installation for any signs of wear or damage.

Quality Assurance and Warranty

Dorman manufactures this 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 operation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. Consult product documentation or the manufacturer for exact warranty terms.