Sunsong 3403921 Power Steering Return Line Hose Assembly - Pipe To Cooler

Power Steering Return Hose for Ford and Lincoln

The Sunsong 3403921 power steering return line hose assembly is built for low-pressure, high-temperature return-side service in select Ford Expedition, Ford F-150, Ford F-350, and Lincoln Navigator applications. It is engineered to restore original routing and fit while helping maintain clean, reliable steering fluid return flow.

Key Features

• Max working pressure of 250 psi for return-line service
• Suitable for low-pressure, high-temperature operation
• High-grade steel tubing with zinc electroplating for corrosion and rust resistance
• Precision-engineered fit for direct replacement use
• Includes required brackets, grommets, heat shields, bushings, and protective sleeves as specified for the application
• Part number 3403921 for easy identification

Detailed Description

Sunsong 3403921 is a power steering return line hose assembly made to match the original routing and mounting points on covered vehicles. The steel tubing is zinc-coated to help resist humidity, road salt, water, and grime, making it a practical replacement for aging or damaged return hoses on the steering system. This part cross-references Gates 352714 for the same application. It is a direct-fit solution for 2010-2014 Ford F-150, 2007-2015 Ford Expedition, 2012 Ford F-350, 2007-2014 Lincoln Navigator, and 2015-2017 Lincoln Navigator applications, with additional coverage for 2016-2017 Ford Expedition.

What It Helps Fix

• Power steering fluid leaks from a worn return hose
• Corrosion on steel steering line tubing
• Heat-related hose deterioration in the return circuit
• Improper fitment after a damaged or previously repaired line
• Noise or steering performance issues caused by restricted fluid return

Installation Notes and Tips

Verify the vehicle year, make, model, and line routing before installation. This assembly is listed for N/A and Pipe To Cooler positions depending on application, so match the original hose path and cooler connection points exactly. Inspect adjacent steering components, mounting points, and heat protection pieces during replacement to ensure the system is restored to original condition. Part number 3403921 should be matched to the vehicle-specific fitment data before ordering.

Quality Assurance

Sunsong manufactures this return hose assembly to exceed original equipment performance standards for the specified low-pressure steering return application. The corrosion-resistant steel construction and application-specific engineering support consistent fit and durable service on compatible Ford and Lincoln models.