Sunsong 3403731 Power Steering Reservoir Hose

Power Steering Reservoir Hose for Subaru Outback

Sunsong 3403731 is a power steering reservoir return hose built for low-pressure, high-temperature service. It is engineered for direct replacement on 2005-2009 Subaru Outback applications and uses 16 mm ID hose ends for a precise connection.

• Fits 2005-2009 Subaru Outback
• Power steering reservoir return hose for low-pressure return flow
• 16 mm ID hose ends on both sides
• 26.4 in. (670 mm) overall length
• CPE hose material for fluid-handling durability
• Max working pressure rated at 250 psi
• Cross-references Dorman HELP 81643 for the same application

Application and Construction

This Sunsong 3403731 hose is made for the power steering return circuit, where fluid moves back to the reservoir under low pressure. The hose is built to exceed original equipment performance standards and is suited for the heat and contamination exposure common in steering systems. For Subaru Outback models from 2005 through 2009, it provides a direct-fit replacement path when the original reservoir hose is worn, cracked, or leaking.

What This Hose Helps Address

• Power steering fluid seepage at the reservoir hose
• Cracked or hardened return hose material
• Soft spots or swelling from heat and fluid exposure
• Steering fluid loss that can lead to low reservoir level
• Noise or inconsistent steering assist caused by return-line leakage

Installation Notes and Tips

Verify the 16 mm ID hose connection points and confirm the 26.4 in. length before installation. Inspect adjoining clamps, fittings, and nearby steering components for wear, and replace any damaged sealing surfaces before filling and bleeding the system. This part number is 3403731, and it is also listed under Subaru OE reference 34611AG07A.

Quality Assurance

Sunsong manufactures this hose with CPE tubing and a 250 psi maximum working pressure rating for return-line service. The part is engineered for exact fitment on the listed Subaru Outback applications and built for resistance to heat and fluid exposure in the steering system.