Sunsong 3403989 Power Steering Return Line Hose Assembly Gear To Cooler

The Sunsong 3403989 is a direct-fit power steering return line hose assembly designed to restore proper fluid flow in the power steering system. Routed from the gear to the cooler, this return hose assembly is engineered to OE specifications for a precise, leak-free fit without modification.

Sunsong manufactures this assembly using a multi-layer construction of CSM rubber and PA braiding, with high-grade electroplated steel fittings featuring a zinc coating for superior corrosion resistance. The hose meets and exceeds SAE J189 performance standards, rated for a maximum working pressure of 250 psi and designed for low-pressure, high-temperature operation. Cold-weather performance is rated down to -40°F.

Key Features:

• OE-matched gear-to-cooler routing for direct, no-modification installation
• Multi-layer CSM rubber hose with PA reinforcement braiding
• High-grade electroplated steel with zinc coating for corrosion resistance
• Exceeds SAE J189 performance standards — 250 psi max working pressure
• Rated to -40°F for reliable cold-weather performance
• Pre-assembled with precise angle and clock position settings on each segment
• Includes all brackets, bushings, mounts, and sleeves — no reuse of worn hardware required
• Can reduce installation labor time by up to 20% compared to individual hose replacement
• Manufactured by an OE supplier to over 20 global automakers

Sunsong is a vertically integrated manufacturer — all compounding, hose production, fitting fabrication, and final assembly are performed in-house to ensure consistent OE-level quality. The 3403989 is a reliable, cost-effective alternative to dealer-sourced power steering hose assemblies.