Dorman H621291 Brake Hydraulic Hose - Rear Left Outer or Rear Right Outer

Reliable Brake Hydraulic Hose for Audi A8 Quattro

The Dorman H621291 brake hydraulic hose is designed specifically for the Audi A8 Quattro, providing a durable and flexible connection within the vehicle's braking system. Engineered with quality materials, this hose ensures consistent brake fluid flow and reliable performance under various driving conditions.

• Compatible with Audi A8 Quattro models
• Overall length of 8.66 inches for precise fitment
• Flexible hose constructed from EPDM rubber for durability
• Black outer sleeve made of rubber with protective jacket included
• Ends feature treated steel fittings: male (End 1) and female (End 2)
• End 1 thread diameter: 10 mm; End 2 fitting inside diameter: M10 x 1.0
• No mounting hardware, brackets, or gaskets included

Durable Construction and Material Details

This brake hydraulic hose features an EPDM rubber hose material known for its resistance to heat, ozone, and brake fluid degradation. The black rubber outer sleeve with an additional protective jacket enhances durability and protects against abrasion and environmental factors. Both ends are equipped with treated steel fittings—male on one end and female on the other—ensuring secure and leak-free connections within the brake system. The hose’s flexible design accommodates movement and vibration, maintaining brake line integrity over time.

Application and Common Issues Addressed

The Dorman H621291 brake hydraulic hose is intended for use in the hydraulic brake system of the Audi A8 Quattro. It replaces worn or damaged brake hoses to restore proper brake fluid flow and system pressure.

• Prevents brake fluid leaks caused by cracked or deteriorated hoses
• Eliminates spongy or unresponsive brake pedal feel due to hose failure
• Resolves brake line swelling or bulging under pressure
• Addresses corrosion or damage to original steel fittings
• Restores safe and consistent braking performance

Installation Notes and Tips

When installing the Dorman H621291 brake hydraulic hose, ensure the vehicle is securely lifted and supported. Carefully remove the old hose, avoiding contamination of the brake fluid system. Verify that the male and female treated steel fittings align correctly with the brake line connections. After installation, bleed the brake system thoroughly to remove air and confirm proper brake pedal feel. Use appropriate tools to avoid damaging the fittings or hose during installation.

Quality Assurance and Warranty

Dorman manufactures this brake hydraulic hose to meet or exceed OEM specifications for fit, form, and function. The use of EPDM rubber and treated steel fittings supports long-term durability and resistance to common brake system stresses. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in material and workmanship, ensuring confidence in replacement parts for the Audi A8 Quattro.