Sunsong 3403019 Power Steering Pressure Line Hose Assembly

Mercedes-Benz Power Steering Pressure Hose

The Sunsong 3403019 power steering pressure line hose assembly is built for select Mercedes-Benz models from 1981-1991. It is engineered to restore steering system pressure with a direct-fit design for applications such as the Mercedes-Benz 380SEL, 420SEL, and 560SEL.

Key Features

• Part number: 3403019
• Power steering pressure line hose assembly for steering system service
• End 1 fitting: 14 mm female swivel
• End 2 fitting: 16 mm male inverted flare
• Hose length: 35.25 in. (895 mm)
• CSM hose material for durability in demanding underhood conditions
• High-grade steel tubing with zinc electroplating for corrosion and rust resistance
• Max working pressure: 1,500 psi
• Burst pressure rating: 8,700 psi
• Tensile strength: 1,600 lb

Detailed Description

Sunsong 3403019 is a power steering pressure line hose assembly made for Mercedes-Benz 380SE, 380SEC, 380SEL, 420SEL, 500SEC, 500SEL, 560SEC, and 560SEL applications across the 1981-1991 model years. The hose is precision engineered for exact fitment and is manufactured to meet demanding pressure requirements for reliable steering response. Its steel tubing is zinc coated to help resist corrosion from humidity, road salt, water, and grime, while the CSM hose construction supports long-term service in the steering circuit. This part cross-references Dorman - HELP 80634 for the same application.

What It Helps Address

• Power steering fluid leaks from a worn or damaged pressure hose
• Loss of steering assist caused by pressure line failure
• Noise or erratic steering operation related to hose deterioration
• Corrosion on the original pressure line assembly
• Fitment issues when replacing an aging Mercedes-Benz steering hose

Installation Notes and Tips

Verify the end fitting sizes before installation: 14 mm female swivel on one end and 16 mm male inverted flare on the other. Confirm hose routing and clearance against the original line, especially around heat sources and moving components. This hose is intended for direct replacement on the listed Mercedes-Benz applications, including 1981-1983 Mercedes-Benz 380SEL, 1982-1983 Mercedes-Benz 380SEC, 1984-1985 Mercedes-Benz 380SE, 1984-1985 Mercedes-Benz 500SEC, 1984-1985 Mercedes-Benz 500SEL, 1986-1991 Mercedes-Benz 420SEL, 1986-1991 Mercedes-Benz 560SEC, and 1986-1991 Mercedes-Benz 560SEL.

Quality Assurance

Each Sunsong pressure hose is high-pressure tested before leaving the factory to confirm proper operation and installation readiness. The 3403019 is built to exceed original equipment performance standards for pressure, burst resistance, and tensile strength.