BMW F10 F11 LCI N47N 520d Fuel Return Line Pipe Hose 7810788

BMW F10 F11 LCI N47N 520d Fuel Return Line Pipe Hose is an original fuel system component designed for facelifted 5 Series models with the N47N engine. Thanks to its factory geometry and connectors, it ensures reliable fuel routing and stable engine operation without the need for any system modifications.

Specifications and technical data

• SKU: 7810788
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810788
• Substitutable numbers: 13537810788, 7810788, EM
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The presented fuel line has been designed specifically for the diesel fuel system in the facelifted BMW 5 Series F10/F11 generation with the N47N 520d engine. It is responsible for stable fuel transport between system components, maintaining the correct operating pressure and system integrity.

By being tailored to the specific body and engine configuration, the fuel pipe maintains the correct routing in the engine bay, minimizing the risk of chafing, vibrations, and unwanted stress during operation.

Construction and OEM fitment

As a part from the Lines, hoses, and pipes group, this component features factory connection ends and a shape consistent with the original BMW installation. This facilitates installation in the location intended by the manufacturer, without the need for adapters or modifications to the fuel system.

Original manufacturing ensures:

• appropriate material resistance to fuel and engine operating temperatures,
• maintenance of proper flexibility at points exposed to vibrations,
• precise fitment with factory brackets and clamps.

Part condition and service application

The item is offered as a used part, sourced from dismantling, which allows for cost-effective repair while maintaining original BMW specifications. This type of component is particularly useful for:

• mechanical damage to the existing line (cracks, abrasions, leaks),
• post-collision repairs within the engine bay,
• restoring the stock fuel system configuration after previous modifications.

Choosing a used OEM component allows you to maintain compliance with the factory fuel system design, which is important for durability and operational safety.

Benefits of using the original fuel line

Using the original fuel pipe in a BMW F10/F11 LCI 520d with an N47N engine translates into a number of practical benefits:

• Factory fitment – the line is prepared for direct installation at the intended mounting points.
• Consistency with other fuel system components – maintaining the stock routing of lines facilitates diagnostics and future repairs.
• Reduced risk of leaks – original connectors and operating diameters are in accordance with the manufacturer's requirements.

If you are planning comprehensive maintenance of the fuel system in your BMW, it is worth considering other elements from the lines and fuel pipes group, available in the Lines, hoses, and pipes{data-blogs=category} category, to maintain the consistency of the entire installation.

Technical support and additional information

Before purchasing, it is recommended to compare the shape and type of connectors with the element currently installed in the vehicle to confirm full compatibility with the specific equipment version. In case of doubt, it is worth consulting the selection of parts with a mechanic or a service center specializing in the BMW brand, especially during extensive fuel system repairs.

If your car is waiting for repairs in a workshop and you want to restore its efficiency quickly, check how the availability of used OEM parts affects service time in the article: how the availability of used OEM parts shortens repair time and reduces service costs. Additionally, more practical tips on selecting fuel system components can be found in our material: practical tips for choosing original BMW fuel lines{data-blogs=blog}.