BMW 3 Series E46 318d 320d M47N Fuel Injection Feed Line Pipe Hose 7787480

BMW 3 Series E46 318d 320d M47N Fuel Injection Feed Line Pipe Hose is an original fuel system component designed for BMW 3 Series E46 diesel engines. As part of the Lines, Hoses and Pipes group, it ensures stable fuel delivery to the injection system, which translates into smooth engine operation and correct starting characteristics. Using this OEM component allows for maintaining the factory fuel routing geometry and compatibility with factory mounts in the engine bay.

Specifications and technical data

• SKU: 7796774
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7796774
• Substitutable numbers: 13537796774, 7796774, 13537787480, 7787480, BG
• Category: Hoses, Lines & Pipes

Purpose and function in the injection system

The fuel feed line for the M47N unit in the BMW 3 Series E46 318d and 320d is responsible for transporting fuel under the appropriate pressure from the low-pressure section to the subsequent components of the injection system. Maintaining the correct cross-section, rigidity, and vibration resistance is crucial for:

• stable operation of the pump and injectors,
• limiting pressure drops in the line,
• reducing the risk of air entering the system,
• maintaining tightness at varying engine operating temperatures.

Thanks to the factory fitment, the line routes fuel in the way designed by BMW, while maintaining safe distances from hot and moving parts.

Original origin and replacement numbers

The element comes from the BMW line, which means compliance with factory quality and construction standards. The line has a dedicated OEM part number and assigned interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle year. The presence of reference numbers allows for precise matching of the component to the fuel system configuration without the need for modifications.

Condition, installation, and service application

The offered line is used, which in service practice often proves to be a beneficial solution when repairing older BMW 3 Series E46 models with the M47N engine. The preserved original geometry and connection ends allow for installation in place of a worn or leaking line without interfering with the system's construction.

When replacing the fuel feed line, it is worth paying attention to:

• the condition of sockets and quick-connectors in the vehicle,
• cleanliness of the fuel system before installation,
• correct positioning of the line relative to factory brackets and covers,
• leak check after the first engine start.

Benefits of using an original BMW line

Using an original fuel feed line in the BMW 3 Series E46 318d/320d M47N allows for maintaining the consistency of the entire injection system. The main advantages include:

• Factory fitment – compatibility with original mounts and the line routing path in the engine bay.
• Operating parameters consistent with the BMW design – appropriate resistance to pressure, temperature, and vibrations characteristic of the M47N engine.
• Reduced risk of leaks compared to random replacements of uncertain origin.
• Possibility of economical fuel system repair while maintaining an OEM component.

Expansion of fuel system and related systems maintenance

When working on the fuel supply system in a BMW 3 Series E46, it is worth considering a comprehensive inspection of accompanying elements, such as other fuel lines, breather hoses, or return pipes. If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other elements from the same group, such as additional feed lines, return hoses, or breather pipes, check the available parts in the BMW Lines, Hoses and Pipes category.

If you are simultaneously servicing the air conditioning or heating system in your car and want to better plan the selection of used OEM components, the guide article Air conditioning and heating – part selection and maintenance for year-round comfort may be helpful, as it discusses practical service procedures and principles for component selection.