Dorman H621991 Brake Hydraulic Hose - Rear Left or Rear Right

Durable Brake Hydraulic Hose for Audi A6, A7, RS7, and S Models

The Dorman H621991 brake hydraulic hose is engineered to provide reliable brake fluid transfer for select Audi vehicles. Designed with quality materials and precise fittings, this flexible brake hose ensures consistent performance and safety for your Audi A6, A7, RS7, and S series models.

• Compatible with Audi A6, A6 Quattro, A7, A7 Quattro, A7 Sportback, RS7, S6, and S7
• Overall length of 18.38 inches for exact fitment
• Flexible hose constructed from durable EPDM rubber with a protective rubber outer sleeve
• End fittings made of treated steel: male fitting (M10 x 1.0 thread) and female fitting (M10 x 1.0 inside diameter)
• Includes a protective jacket for added durability
• Mounting hardware, brackets, gaskets, or seals are not included

Product Details and Specifications

The Dorman H621991 brake hydraulic hose 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 of the hose are equipped with treated steel fittings—one male and one female—each with M10 x 1.0 thread specifications to ensure a secure and leak-free connection. The hose measures 18.38 inches in overall length, matching the original equipment dimensions for proper installation on compatible Audi models.

Applications and Common Issues Addressed

• Replacement for worn or cracked brake hydraulic hoses on Audi A6, A7, RS7, and S series vehicles
• Resolves brake fluid leaks caused by damaged or deteriorated hoses
• Prevents brake system failure due to hose swelling or bursting
• Restores proper brake pedal feel and hydraulic pressure
• Addresses issues related to hose abrasion or external damage

Installation Notes and Tips

Installation of the Dorman H621991 brake hydraulic hose requires basic automotive brake system knowledge and tools. Ensure the brake system is depressurized before removal. Verify the hose length and fitting types match your vehicle’s specifications. 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 confirm proper brake function.

Quality Assurance and Warranty Information

Dorman manufactures the H621991 brake hydraulic hose to meet or exceed OEM standards for fit, form, and function. The use of treated steel fittings and EPDM rubber materials ensures durability and resistance to common brake system contaminants. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.