Dorman H380478 Brake Hydraulic Hose - Rear Left

Reliable Brake Hydraulic Hose for Buick and Oldsmobile Models

The Dorman H380478 brake hydraulic hose is designed to provide dependable brake fluid transfer for select Buick and Oldsmobile vehicles. Engineered with durable materials, this flexible brake hose ensures consistent performance and safety for your Cutlass Supreme or Regal.

• Compatible with Buick Cutlass Supreme and Oldsmobile Regal
• Overall length of 9.75 inches for precise fitment
• Constructed with EPDM rubber hose and a protective rubber outer sleeve
• Includes gaskets for secure sealing
• Ends feature treated steel fittings: banjo type on one end and female fitting on the other
• Thread specifications: 10 mm diameter and M10 x 1.0 inside diameter
• Flexible hose design with a durable jacket for added protection

Durable Construction and Precise Fitment

This Dorman brake hydraulic hose (part number H380478) is built with EPDM rubber, known for its resistance to heat, ozone, and brake fluid degradation. The black rubber outer sleeve and included jacket provide additional protection against abrasion and environmental factors. Both ends of the hose feature treated steel fittings—one banjo type and one female fitting—ensuring a secure connection to the brake system. The included gaskets help maintain a leak-free seal during installation. With an overall length of 9.75 inches, this hose is designed specifically for the brake systems of Buick Cutlass Supreme and Oldsmobile Regal models.

Applications and Problem Resolution

• Replaces worn or cracked brake hydraulic hoses
• Addresses brake fluid leaks caused by damaged fittings or seals
• Restores proper brake fluid pressure and pedal feel
• Prevents brake system contamination from external debris
• Ensures safe and reliable brake operation for Buick Cutlass Supreme and Oldsmobile Regal vehicles

Installation Notes and Tips

When installing the Dorman H380478 brake hydraulic hose, ensure all old gaskets are removed and replaced with the included new gaskets to prevent leaks. Verify the hose length and fitting types match your vehicle’s specifications. Use proper torque settings on banjo bolts and fittings to avoid damage. Inspect the brake system for any additional wear or damage during installation. Bleed the brake system thoroughly after installation to remove air and restore 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 H380478 part undergoes rigorous quality control to ensure durability and reliability in demanding brake system applications. This product includes a limited warranty against defects in material and workmanship, providing confidence in its long-term performance for Buick Cutlass Supreme and Oldsmobile Regal brake systems.