Dorman H380739 Brake Hydraulic Hose - Rear Left Inner or Rear Right Inner

Reliable Brake Hydraulic Hose for Audi 90 Quattro, A4 Quattro, and S4

The Dorman H380739 brake hydraulic hose is designed to provide dependable brake fluid transfer for select Audi models. Engineered with durable materials, this flexible hose ensures consistent braking performance for the Audi 90 Quattro, A4 Quattro, and S4.

• Compatible with Audi 90 Quattro, A4 Quattro, and S4 models
• Flexible brake hydraulic hose constructed with EPDM rubber
• Black outer sleeve made of durable rubber for protection
• Both ends feature treated steel female fittings with M10 x 1.0 thread diameter
• Overall length of 7.38 inches for precise fitment
• Mounting hardware, brackets, gaskets, or seals not included

Durable Construction and Precise Fitment

This Dorman brake hydraulic hose (part number H380739) is built with an EPDM rubber hose material that offers resistance to heat, ozone, and brake fluid degradation. The black rubber outer sleeve provides additional protection against abrasion and environmental factors. Both ends of the hose have treated steel female fittings with a 10 mm thread diameter (M10 x 1.0), ensuring secure connections to the brake system. With an overall length of 7.38 inches, this flexible hose is designed to match the original equipment specifications for the Audi 90 Quattro, A4 Quattro, and S4 models.

Common Applications and Problem Resolution

• Replaces worn or cracked brake hydraulic hoses causing fluid leaks
• Restores proper brake fluid flow and pressure for consistent braking
• Addresses hose swelling or bulging under pressure
• Eliminates brake pedal softness due to hose deterioration
• Prevents brake system failure from damaged or corroded fittings

Installation Notes and Tips

Installation of the Dorman H380739 brake hydraulic hose requires basic brake system knowledge and tools. Ensure the brake system is depressurized before removal. Since mounting hardware and brackets are not included, reuse existing components if they are in good condition or source replacements separately. After installation, bleed the brake system thoroughly to remove air and verify there are no leaks at the fittings. Confirm the hose length and fitting types match the vehicle’s original specifications for proper fitment.

Quality Assurance and Warranty Information

Dorman manufactures this brake hydraulic hose to meet or exceed OEM standards for durability and performance. The use of treated steel fittings and EPDM rubber hose material supports long service life under typical operating conditions. While specific warranty details are not provided, Dorman products generally come with a limited warranty against defects in material and workmanship. Refer to Dorman’s official documentation for complete warranty terms.