Dorman H621058 Brake Hydraulic Hose - Front Left or Front Right

Reliable Brake Hydraulic Hose for Lexus GS and RC Models

The Dorman H621058 brake hydraulic hose is designed to provide dependable brake fluid transfer for select Lexus vehicles. Engineered with durable materials, this flexible hose ensures consistent braking performance for models including the GS200t, GS300, GS350, GS430, GS450h, GS460, GS F, IS500, RC300, RC350, and RC F.

• Compatible with multiple Lexus GS and RC series models
• Flexible hose constructed from EPDM rubber for durability
• Black outer sleeve made of rubber for protection
• Includes gaskets for secure sealing
• Ends feature treated steel fittings: banjo type on one end and female fitting on the other
• Overall length of 14.3 inches with precise thread and fitting dimensions

Durable Construction and Precise Fitment

This Dorman brake hydraulic hose (part number H621058) features a flexible EPDM rubber hose material that resists heat, ozone, and brake fluid degradation. The black rubber outer sleeve adds an extra layer of protection against abrasion and environmental factors. Both ends are equipped with treated steel fittings—one banjo fitting with a 10 mm thread diameter and one female fitting with an M10 x 1.0 inside diameter—ensuring a secure and leak-free connection. The hose measures 14.3 inches overall length, with an axis length of 13.56 inches, designed to match the original equipment specifications for the listed Lexus models.

Applications and Problem Resolution

This brake hydraulic hose is intended for use in the brake system to transfer brake fluid under pressure from the master cylinder to the brake calipers or wheel cylinders. It is suitable for addressing issues such as:

• Cracked or leaking brake hoses causing fluid loss
• Swollen or deteriorated hose material affecting brake response
• Corroded or damaged fittings leading to brake fluid leaks
• Brake hose failure resulting in reduced braking efficiency
• Replacement during brake system maintenance or upgrades

Installation Notes and Tips

Installation of the Dorman H621058 brake hydraulic hose requires careful attention to ensure proper sealing and fitment. Use the included gaskets to prevent leaks at the fitting connections. Verify that the banjo and female fittings align correctly with the vehicle’s brake components. Avoid twisting or kinking the hose during installation to maintain flexibility and integrity. It is recommended to bleed the brake system thoroughly after installation to remove any air and ensure optimal brake performance.

Quality Assurance and Warranty

Dorman brake hydraulic hoses are manufactured to meet or exceed OEM standards for fit, form, and function. The use of treated steel fittings and EPDM rubber hose material supports long-term durability and resistance to common brake system stresses. This product includes gaskets to ensure a proper seal and reduce the risk of leaks. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship.