Sunsong 3604945 Power Steering Return Line Hose Assembly - From Gear

Power Steering Return Hose for Highlander

The Sunsong 3604945 power steering return line hose assembly is built for low-pressure, high-temperature return-side service. It is a direct-fit replacement for select Toyota Highlander applications and is engineered to restore proper fluid routing from the gear.

• Steel hose construction for durability
• 27.6 in. (700 mm) overall length
• End 1: 17 mm male fitting
• End 2: 3/8 in. bubble flare fitting
• Maximum working pressure: 250 psi
• Zinc-plated tubing for corrosion and rust resistance
• Precision-engineered fit for 2001-2003 Toyota Highlander, from gear

Detailed Product Overview

Sunsong 3604945 is a power steering return line hose assembly made for 2001-2003 Toyota Highlander models, from gear. It uses high-grade steel tubing with zinc electroplating to help resist moisture, road salt, grime, and other underhood and underbody exposure. The hose is built to OE-style dimensions and connection points, including a 17 mm male end and a 3/8 in. bubble flare end, to support accurate routing and secure sealing in the return circuit. This part number, 3604945, is a direct replacement choice for Highlander power steering return line service.

This part cross-references Gates 352965 and Hayden 5910 for the same application.

Common Problems This Part Can Address

• Power steering fluid seepage at the return line
• Corrosion on the original steel hose assembly
• Restricted or damaged return-side fluid routing
• Noise or poor steering feel caused by a compromised hose
• Fitment issues when replacing a worn Toyota Highlander return line

Installation Notes and Tips

Verify the vehicle is a 2001-2003 Toyota Highlander with the return line routed from the gear before installation. Compare the 17 mm male and 3/8 in. bubble flare connections to the original hose, and confirm the 27.6 in. length matches the factory routing path. Inspect adjacent seals, clamps, and mounting points for wear before completing the repair.

Quality Assurance

Sunsong states that this return hose exceeds original equipment performance standards for return-side service and is engineered for exact fit. The zinc-coated steel construction is specified to improve resistance to corrosion and rust in harsh operating conditions.