Sunsong 3401875 Power Steering Return Line Hose Assembly - Cooler To Reservoir

Power Steering Return Hose for Explorer and Mountaineer

Sunsong 3401875 is a power steering return line hose assembly for low-pressure, high-temperature return-side service. It is built for direct replacement on select Ford Explorer and Mercury Mountaineer applications, with exact-fit dimensions and corrosion-resistant tubing where specified.

• Fits 1998-2001 Ford Explorer, cooler to reservoir
• Fits 1998-2001 Mercury Mountaineer, cooler to reservoir
• 3/8 in. ID hose ends on both sides
• 31.5 in. overall length, 800 mm
• CSM hose material for return-line service
• Max working pressure rated to 250 psi
• High-grade steel tubing with zinc electroplating for rust and corrosion resistance

Product Details

This Sunsong power steering return line hose assembly, part number 3401875, is engineered to restore the return path between the cooler and reservoir on compatible Ford Explorer and Mercury Mountaineer vehicles. The assembly is built to OE-style dimensions and uses 3/8 inch ID hose connections at both ends, with a 31.5 inch overall length for the specified routing. Sunsong 3401875 is intended for low-pressure return-side operation and is rated for up to 250 psi working pressure.

According to the manufacturer, the tubing uses high-grade steel with zinc electroplating to improve resistance to road salt, moisture, grime, and other underhood and underbody exposure. This part cross-references Gates 365404 for the same application.

Common Repair Symptoms

• Power steering fluid seepage at the return hose
• Cracked, hardened, or swollen hose material
• Corrosion on the return line tubing
• Fluid loss between the cooler and reservoir
• Noisy steering caused by low fluid level from a leaking line

Installation Notes

Verify routing, end sizes, and position before installation. This hose assembly is listed for cooler-to-reservoir placement on 1998-2001 Ford Explorer and 1998-2001 Mercury Mountaineer models. Inspect adjacent brackets, grommets, heat shields, bushings, and protective sleeves during service and replace worn components as needed to restore the system to proper condition.

Quality Assurance

Sunsong manufactures this return hose assembly to exceed original equipment performance standards for return-line service. The combination of exact-fit engineering, corrosion-resistant tubing, and pressure-rated construction supports reliable steering system repair on the listed Ford and Mercury applications.