BMW 3 Series E90 E91 E92 E93 LCI N57 325d 330d Fuel Return Line Pipe 7799995

BMW E90 E92 LCI N57 325d 330d Fuel Line Hose is an original part from the Lines, Hoses, and Pipes group, designed for the fuel system of BMW 3 Series diesel engines with the N57 unit. The used OEM part ensures a factory fit, correct hose diameter, and routing, which translates to stable fuel system operation and hassle-free installation in place of the old component.

Specifications and technical data

• SKU: 7799995
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799995
• Substitutable numbers: 13537799995, 7799995, KZ
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

The fuel line in the N57 engine is responsible for safely and securely conveying diesel fuel between fuel system components. In BMW E90 and E92 LCI models with 325d and 330d units, the correct selection of the line is crucial for:

• maintaining proper fuel pressure throughout the supply line,
• reducing the risk of leaks and spills in the engine bay,
• stable engine operation under load and during acceleration,
• maintaining compliance with factory wiring and accessory routing.

By using an original line dedicated to the N57 engine in the 325d and 330d versions, you avoid problems typical of aftermarket parts with imprecise shapes or incorrect flexibility.

Construction and Fit for BMW E90 / E92 LCI N57

The offered fuel line has been specifically designed for the engine bay geometry of the facelifted (LCI) BMW 3 Series, meaning its length, routing, and mounting method are adapted to factory brackets and connectors. This facilitates installation and allows for maintaining the original system layout, without stressing or causing unwanted kinks in the hose.

As an OEM part from the Lines, Hoses, and Pipes group, the line is compatible with factory connectors used in the N57 fuel system, minimizing the risk of leaks at connections and eliminating the need for modifications.

Benefits of Using an Original Fuel Line

Choosing an original fuel line for a BMW with an N57 engine offers a number of practical benefits for everyday operation:

• Factory Fit – the line is prepared for specific 325d and 330d variants, facilitating installation and servicing.
• Stable Fuel System Operation – the correct cross-section and flexibility of the line support even fuel flow.
• Operational Safety – proper connections and hose routing reduce the risk of leaks in the engine bay.
• Consistency with the Rest of the System – maintaining the original line routing simplifies subsequent servicing and diagnostics.

A used OEM part is a sensible choice for maintenance repairs when you want to preserve the factory fuel system parameters at a controlled cost.

Selection, Installation, and Integration with Other Components

Before installing the fuel line in a BMW E90 or E92 LCI with an N57 engine, it is advisable to verify compatibility based on the body, engine version, and year of manufacture to ensure a perfect fit with the existing system. The hose replacement should be performed while maintaining the cleanliness of the fuel system and following the correct bleeding procedure, which helps avoid problems with engine starting and operation.

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other parts from the same group, such as additional lines, flexible hoses, or rigid supply pipes, check the available parts in the BMW Lines, Hoses, and Pipes category.

Technical Support and Knowledge of BMW Systems

When working with modern BMW units, it is advisable to use reliable sources of knowledge regarding engine accessories, compatibility, and installation procedures. If you are interested in topics related to selecting components for newer generations of the 3 Series, such as the turbocharger or intercooler in a B58 gasoline engine, our guide may be helpful: BMW B58 Code, or 340 HP from the Aftermarket – Checklist Before Buying a Turbocharger and Intercooler for the BMW 3 Series (G20). There you will find practical tips that facilitate informed planning of upgrades and repairs in BMW cars.