Sunsong 3405166 Power Steering Return Line Hose Assembly - Gear To Cooler

Sunsong 3405166 Power Steering Return Hose

The Sunsong 3405166 power steering return line hose assembly is built for low-pressure, high-temperature return-side service in the steering system. It is a direct-fit replacement for select Mercedes-Benz E-Class and AMG applications, including Mercedes-Benz E320, E430, and E55 AMG models with gear-to-cooler routing.

Key Features

• Power steering return line hose assembly for gear-to-cooler applications
• Rated for a maximum working pressure of 250 psi
• CSM hose material for return-side fluid handling
• End 1: 16 mm banjo fitting
• End 2: 9.6 mm ID hose connection
• Precision-engineered for exact fit on listed Mercedes-Benz applications
• Cross-reference part numbers include ACI 81228 and Gates 352864

Detailed Description

This Sunsong power steering return line hose assembly, part number 3405166, is engineered for the return circuit between the steering gear and cooler. It is specified for 1998-2003 Mercedes-Benz E55 AMG, 1998-2002 Mercedes-Benz E320, and 1998-2002 Mercedes-Benz E430 models in gear-to-cooler position. The hose is constructed from CSM material and uses a 16 mm banjo fitting on one end with a 9.6 mm ID hose connection on the other, supporting reliable fluid transfer in the steering system.

For Mercedes-Benz E320 power steering return hose replacement, Mercedes-Benz E430 steering return line service, or Mercedes-Benz E55 AMG gear-to-cooler hose repair, this part number 3405166 provides the correct fitment profile for the listed vehicles. Sunsong states that its return hoses meet or exceed original equipment performance standards and are built for high-temperature, low-pressure operation.

Vehicle Fitment

• Fits 1998-2003 Mercedes-Benz E55 AMG, Gear To Cooler
• Fits 1998-2002 Mercedes-Benz E320, Gear To Cooler
• Fits 1998-2002 Mercedes-Benz E430, Gear To Cooler

Common Repair Symptoms

• Power steering fluid seepage at the return line
• Cracked or hardened hose material from heat exposure
• Steering fluid loss from worn banjo or hose connections
• Noise or inconsistent steering assist caused by low fluid level
• Corrosion-related deterioration in the steering return line

Installation Notes and Tips

Confirm the vehicle uses gear-to-cooler routing before installation and match the fitting sizes to the original hose. Inspect the steering cooler, clamps, and connection points for wear or contamination before installing the new hose. Properly route the hose away from heat sources and moving components to help maintain service life.

Quality Assurance

Sunsong designs this return hose assembly to meet original equipment performance expectations for pressure and temperature demands in the steering return circuit. The tubing is manufactured from high-grade steel with zinc electroplating for added resistance to corrosion, rust, humidity, road salt, water, and grime.