Fuel Line BMW F30 F31 LCI F10 F11 N57Z Injection System Return Pipe Hose 7823401

Fuel Line BMW F30 F31 LCI F10 F11 N57Z Injection System Return Pipe Hose is an original diesel engine fuel system component designed for BMW 3 and 5 Series models. Thanks to its factory geometry and precise fit for the N57Z unit, it ensures stable fuel delivery and supports the safe, uniform operation of the injection system. This is a practical solution for users looking to restore the proper efficiency of the fuel system using an original BMW part in used condition.

Specifications and technical data

• SKU: 7823401
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7823401
• Substitutable numbers: 7823401, 13537823401, 7823402, 13537823402
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The presented hose is designed to operate in a diesel engine fuel system, where maintaining proper pressure and flow tightness is crucial. For N57Z units, a correctly selected fuel hose reduces the risk of pressure drops, leaks, and starting problems, which translates into stable engine performance and predictable load response.

This component is responsible for the safe routing of fuel between selected system components, minimizing vibrations and stress thanks to its tailored length and shape. Using a dedicated hose instead of universal replacements allows for maintaining factory flow characteristics and compliance with manufacturer requirements.

Benefits of using an original BMW hose

Using an original fuel hose in BMW F30, F31 LCI, F10, and F11 series cars with the N57Z engine offers a number of practical advantages:

• factory fit for the fuel system of a specific BMW generation,
• maintenance of the correct hose routing, which reduces the risk of abrasion and mechanical damage,
• compatibility with diesel engine equipment,
• easier diagnostics and service due to the use of parts consistent with manufacturer documentation.

For users who value predictability and compliance with factory standards, choosing an original BMW fuel hose is a reasonable alternative to uncertain replacements of unknown origin.

Technical characteristics and compatibility

The hose belongs to the group of elements defined as Lines, hoses, and pipes, which are components responsible for transporting working media in the vehicle. In this case, the medium is diesel fuel, which requires the use of materials resistant to diesel oil and the typical operating temperatures of a diesel engine.

Thanks to its assignment to the specific N57Z power unit and BMW F30/F31 LCI and F10/F11 platforms, this part is structurally prepared to work with factory equipment, mounts, and brackets. This facilitates installation and reduces the need for modifications, which is important both in professional service and for DIY repairs.

Condition, installation, and service application

The offered item is in used condition, which allows for economical fuel system repair while maintaining the original manufacturer specification. Before installation, it is recommended to perform a standard check of tightness, connector cleanliness, and verification of proper positioning relative to other components to avoid unwanted stress and potential leaks.

The hose will work particularly well in situations such as:

• repair after detecting leaks or mechanical damage to the existing hose,
• restoring the factory configuration of the fuel system after previous modifications,
• comprehensive service of the N57Z unit, combined with the replacement of consumables.

Support with selection and related content

If you are planning broader fuel system maintenance or other installations in your BMW, it is worth checking out other items from the lines, hoses, and pipes group, available in the Lines, hoses, and pipes{data-blogs=category} category. This will make it easier to complete a set of parts necessary for a single, consistent repair.

For those interested in the subject of used parts and optimizing vehicle operating costs, an article on selecting components for other models, e.g., MINI, may also be useful – more information can be found in the material: used car parts for Mini Cooper – a way for style and savings. This is a good supplement to your knowledge when making informed purchasing decisions regarding used parts.