BMW 1 3 Series E87 E90 E91 Power Steering Rack Expansion Hose Pipe 6779313

Description

BMW 1 3 Series E87 E90 E91 Power Steering Rack Expansion Hose Pipe is an original hydraulic component designed to work with the factory steering gear in 1 and 3 Series models. As part of the Power steering pumps group, it is responsible for the safe drainage and stabilization of fluid, which translates into predictable steering system performance. A used OEM component is a sensible choice for power steering system maintenance when you want to maintain factory operating characteristics.

Specifications and technical data

• SKU: rhd-6779313
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6779313
• Substitutable numbers: 32416779313, 6779313, BG
• Category: Power Steering Pumps

Purpose and function in the power steering system

The presented expansion hose is a hydraulic system component that works with the steering gear and power steering pump in BMW 1 Series E87 and 3 Series E90/E91 vehicles. Its task is the controlled routing of power steering fluid between individual sections of the system, taking into account pressure and temperature changes during driving.

By maintaining the original geometry and internal diameters, the hose helps to maintain the proper flow of the working medium, which supports:

• stable operation of the power steering pump under variable loads,
• proper operation of the steering gear throughout the full steering range,
• reduction of the risk of cavitation and pressure drops in the system.

Benefits of using an original BMW hose

Using an original expansion hose in the BMW power steering system allows you to maintain factory operating parameters without the need for system modifications. Precise fitment to the steering gear and pump minimizes stress on the connections and reduces the risk of leaks. This is particularly important in vehicles used daily, where the power steering system operates across a wide range of temperatures and loads.

By choosing a used OEM component, you receive:

• a component designed specifically for the steering system of the given generation of BMW 1 and 3 Series,
• preservation of the original hose routing in the engine bay,
• the ability to install without modifications to the hydraulic system.

Condition, origin, and installation aspects

The offered hose comes from dismantling and is classified as a used part, which allows for economical repair of the power steering system while retaining an OEM component. Before installation, a standard service procedure is recommended: visual inspection, checking the connections, and replacing the power steering fluid according to the vehicle manufacturer’s recommendations.

During installation, it is worth paying attention to:

• proper positioning of the hose relative to the body and engine components,
• tightening torque of the connections in accordance with BMW service documentation,
• bleeding the system after filling with fresh fluid.

Integration with the vehicle system and part selection

The expansion hose works directly with the power steering pump and steering gear, so its selection should be based on vehicle data and catalog numbers. The product has assigned interchangeable numbers, which facilitates verification of compatibility with a specific BMW 1 or 3 Series configuration. For certainty of fitment, it is worth using the VIN and service documentation.

If you are planning a comprehensive repair or upgrade of the steering system area in your BMW and need other components from the same group, such as high-pressure hoses, return lines, or additional sections of the hydraulic installation, check the available parts in the BMW Power steering pumps category.

Technical support and service knowledge

When working on hydraulic and fuel systems, knowledge of the principles of selecting components by OEM numbers and correct bleeding and leak test procedures is helpful. To better understand the relationships between pumps, hoses, and tanks in vehicle systems, it is worth referring to the guide material: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This will allow you to organize your knowledge about the operation of supply systems and fluid flow in the car, which translates into more informed servicing of the power steering system as well.

Summary

BMW 1 3 Series E87 E90 E91 Power Steering Rack Expansion Hose Pipe is a practical solution for users looking for an original hydraulic element from the Power steering pumps group. A used OEM component enables the restoration of proper steering system operation while maintaining factory characteristics, without the need for interference with the vehicle’s design. It is an informed choice for servicing the BMW 1 and 3 Series, combining functionality with reasonable repair costs.