Sunsong 3403920 Power Steering Return Line Hose Assembly - From Gear

Sunsong 3403920 Power Steering Return Hose

The Sunsong 3403920 is a power steering return line hose assembly built for low-pressure, high-temperature return-side service. It is engineered for direct replacement on select Ford and Lincoln applications, including Expedition, Navigator, and F-150 models with return-from-gear routing.

Key Features

• Max working pressure of 250 psi for return-line operation
• Suitable for low-pressure, high-temperature steering system service
• Steel tubing with zinc electroplating for corrosion and rust resistance
• Precision-engineered for exact fit on the listed applications
• Includes required brackets, grommets, heat shields, bushings, and protective sleeves as needed to restore wearable components to original condition

Detailed Description

This power steering return line hose assembly is built to replace worn or damaged return plumbing on vehicles that route fluid from the gear. The Sunsong 3403920 is made for 2009-2017 Ford Expedition, 2009-2017 Lincoln Navigator, and 2010 Ford F-150 applications with the correct from-gear configuration. It uses high-grade steel tubing with a zinc coating to help resist corrosion from humidity, road salt, water, and grime, while supporting the demands of steering fluid return service. This part cross-references Dorman HELP 93318 for the same application.

What It Helps Fix

• Steering fluid leaks at the return line
• Corrosion or rust on the original hose assembly
• Heat-related deterioration of return-side steering plumbing
• Fitment issues caused by bent, damaged, or fatigued tubing
• Noisy or inconsistent steering performance related to low fluid level from a leaking return hose

Installation Notes and Tips

Verify the vehicle uses the from-gear return line routing before installation. Compare the original hose shape, bracket locations, and connection points to confirm correct fitment for your Ford Expedition, Lincoln Navigator, or Ford F-150. Inspect surrounding bushings, sleeves, and heat protection during replacement so the steering system is restored as intended.

Quality Assurance

Sunsong states that this hose assembly exceeds original equipment performance standards for return-line service and is manufactured with corrosion-resistant steel tubing for long-term durability in demanding underhood conditions.