Sunsong 3403958 Power Steering Pressure Line Hose Assembly - Pump To Rack

Mercedes-Benz Power Steering Pressure Hose

The Sunsong 3403958 power steering pressure line hose assembly is built for direct replacement on select Mercedes-Benz steering systems. It is engineered for the pump-to-rack route and built to handle high-pressure steering fluid flow with corrosion-resistant tubing and precision fitment.

For Mercedes-Benz ML350 and R350 applications, this hose assembly helps restore stable steering response and reliable fluid transfer in the power steering circuit.

Key Features

• Max working pressure of 1,500 psi for demanding steering system operation
• Burst pressure rating of 8,700 psi and tensile strength of 1,600 lb
• High-grade steel tubing with zinc electroplating for rust and corrosion resistance
• Precision-engineered fit for pump-to-rack routing
• Built with required brackets, grommets, switch ports, heat shields, bushings, and protective sleeves as needed to restore original condition
• High-pressure tested before leaving the factory

Detailed Description

Sunsong 3403958 is a power steering pressure line hose assembly made to meet or exceed original equipment performance standards. It is designed for 2006-2011 Mercedes-Benz ML350 and 2006-2011 Mercedes-Benz R350 pump-to-rack applications, with fitment notes for 2008-2009 R350 models from chassis # A035912 and 2006-2007 R350 models excluding Adaptive Damping System. The hose uses high-grade steel tubing with zinc coating to resist humidity, road salt, water, and grime while maintaining dependable pressure delivery. This part cross-references Dorman - HELP 81663 for the same application. Part number 3403958 is a direct-fit steering repair solution for Mercedes-Benz pressure line replacement needs.

Common Problems This Part Helps Address

• Power steering fluid leaks from a worn or damaged pressure hose
• Loss of steering assist caused by pressure line failure
• Corrosion-related hose deterioration in harsh road conditions
• Noise or inconsistent steering feel from restricted fluid flow
• Fitment issues when replacing an original pump-to-rack hose on Mercedes-Benz ML350 or R350

Installation Notes and Quality Assurance

Install on the pump-to-rack steering circuit only for the listed Mercedes-Benz applications. Verify chassis breakpoints and equipment notes before installation, especially for 2008-2009 R350 from chassis # A035912 and 2006-2007 R350 without Adaptive Damping System. The assembly is high-pressure tested at the factory to confirm leak-free operation and proper function before shipment. Part number 3403958 is engineered for direct replacement service on the specified vehicles.