Sunsong 3403655 Power Steering Return Line Hose Assembly - Gear To Cooler

BMW Power Steering Return Hose

Sunsong 3403655 is a power steering return line hose assembly for select BMW applications with gear-to-cooler routing. It is built for low-pressure, high-temperature return service and is engineered to match original fitment requirements for BMW 325Ci, 325i, 330Ci, 330i, 320i, 323Ci, 323i, 328Ci, and 328i models.

Key Features

• Max working pressure of 250 psi for return-side steering service
• Suitable for low-pressure, high-temperature operation
• High-grade steel tubing with zinc electroplating for corrosion and rust resistance
• Precision-engineered fit for exact vehicle application alignment
• Includes required brackets, grommets, heat shields, bushings, and protective sleeves as specified for the application
• Cross-references ACI 81444 and Rein PSH0110R / PSH0498 for the same application

Detailed Description

This Sunsong power steering return line hose assembly is built to restore the return path between the steering gear and cooler on compatible BMW E46 chassis vehicles. Part number 3403655 is manufactured with steel tubing and a zinc-coated finish to help resist corrosion from humidity, road salt, water, and grime. The assembly is precision engineered to match original routing and fitment requirements, making it a direct replacement choice for BMW 325Ci, 325i, 330Ci, 330i, 320i, 323Ci, 323i, 328Ci, and 328i models with gear-to-cooler positioning.

What It Helps Fix

• Power steering fluid seepage or leakage in the return line
• Corrosion-damaged steel tubing on the steering return circuit
• Restricted or weakened return flow from age-related hose deterioration
• Noise or steering performance issues caused by a compromised return hose assembly
• Fitment problems from bent, rusted, or mismatched original routing components

Installation Notes

Verify the vehicle’s steering line routing and position before installation. This part is for gear-to-cooler applications only and should be matched to the original hose path on the vehicle. Use the included application-specific brackets and protective components where required, and inspect surrounding steering and cooling components for wear before completing the repair. Tech Tip: TT1000.

Quality Assurance

Sunsong 3403655 is engineered to meet original equipment performance standards for return hose service and is built with corrosion-resistant materials for long-term durability in demanding underhood conditions.