Sunsong 3404423 Power Steering Pressure Line Hose Assembly

BMW Power Steering Pressure Hose

The Sunsong 3404423 power steering pressure line hose assembly is built for direct replacement on select BMW 5 Series applications. It is engineered to restore steering fluid transfer under pressure while matching the original routing and connection style for a clean installation.

• Fits 2004-2005 BMW 525i, N/A, exc. Dynamic Drive, w/o Active Steering
• Fits 2003-2005 BMW 530i, N/A, exc. Dynamic Drive, w/o Active Steering
• 14 mm banjo end fitting and 16 mm banjo end fitting
• 71 in. overall length for application-specific routing
• CSM hose material for fluid resistance and durability
• Part number 3404423 for direct identification and ordering

Built To OE-Style Specifications

Sunsong 3404423 is a power steering pressure line hose assembly designed around the original vehicle layout for BMW 525i and BMW 530i models listed above. The hose uses high-grade steel tubing with zinc electroplating to improve resistance to corrosion from humidity, road salt, water, and grime. It is pressure tested before shipment and built to handle a maximum working pressure of 1,500 psi, a burst pressure rating of 8,700 psi, and a tensile strength of 1,600 lb.

This part cross-references Four Seasons 55468 and Gates 366294 for the same application.

Common Steering Problems It Can Address

• Power steering fluid leaks from a worn or damaged pressure line
• Steering noise caused by pressure loss in the hydraulic circuit
• Hard or inconsistent steering effort from restricted fluid flow
• Corrosion-related hose deterioration in high-exposure driving conditions
• Fitment issues when replacing a failed BMW 5 Series pressure hose

Installation Notes And Fitment Tips

Compatible With 2004-2005 BMW 525i and 2003-2005 BMW 530i, with notes excluding Dynamic Drive and vehicles with Active Steering. Verify banjo fitting sizes, hose routing, and mounting points before installation. The 71-inch length and application-specific end fittings are intended to match the original pressure line layout on the listed BMW models. Part number 3404423 is the reference to confirm the correct hose assembly.

Quality Assurance

Each Sunsong pressure hose is high-pressure tested at the factory before release to help ensure proper operation after installation. The assembly is engineered to restore worn wearable components to original condition where applicable and to provide consistent pressure-line performance on the specified BMW applications.