Sunsong 3402519 Power Steering Reservoir Hose - Reservoir To Pump

BMW 740i Reservoir to Pump Hose

The Sunsong 3402519 power steering reservoir hose is a direct-fit return hose for select BMW 740i and 740iL applications. It is built for low-pressure, high-temperature service and engineered to restore the reservoir-to-pump connection with the correct fit and routing.

Key Features

• Fits 1997-2001 BMW 740i, reservoir to pump
• Fits 1996-2001 BMW 740iL, reservoir to pump
• Fits 1994-1995 BMW 740iL, reservoir to pump, w/o self leveling
• Max working pressure rated at 250 psi for return-side operation
• Banjo end 1 fitting, 18 mm
• 5/8 in. ID hose end 2 connection
• 24.8 in. overall length for OE-style routing
• Steel tubing with zinc electroplating for corrosion and rust resistance

Detailed Description

Sunsong 3402519 is a power steering reservoir hose designed for the return side between the reservoir and pump on select BMW 740i and BMW 740iL models. The hose is precision engineered to match the original routing and connection points, helping maintain proper fluid transfer in low-pressure steering systems. Its steel construction with zinc coating adds resistance to humidity, road salt, water, and grime, making it a practical replacement for worn or corroded steering hose assemblies. This part cross-references Gates 352163 for the same application.

What It Helps Address

• Power steering fluid seepage at the reservoir-to-pump return line
• Cracked, hardened, or deteriorated hose material
• Corrosion on the hose assembly from road exposure
• Poor steering fluid transfer caused by a damaged return hose
• Fitment issues from an incorrect-length replacement hose

Installation Notes and Tips

Confirm the vehicle application before installation, especially on 1994-1995 BMW 740iL models, which are listed without self leveling. Match the banjo and hose-end connections, along with the 24.8-inch length, to the original routing before tightening the system. After installation, inspect for leaks and verify steering fluid level with the engine running and the wheels straight.

Quality Assurance

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