Fuel Rail BMW E90 E91 E92 LCI F30 F10 F01 N57 Diesel High Pressure 7800124

BMW E90 E91 E92 LCI F30 F10 F01 N57 Fuel Rail 7800124 is an original, used fuel system rail designed for BMW N57 diesel engines. This component comes from the original BMW production line, ensuring proper fitment with the injection system and stable operating parameters for the power unit.

Specifications and technical data

• SKU: 7805423-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805423
• Substitutable numbers: 13537805423, 7805423, 13537800124, 7800124
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

In a diesel engine, the fuel rail is responsible for storing and evenly distributing fuel to individual injectors. In N57 units, it operates within a common rail system, stabilizing fuel pressure and enabling precise injection dosing across the entire load range.

Selecting a rail dedicated to specific generations of BMW 3, 5, and 7 Series with N57 engines helps maintain the correct operating characteristics of the fuel system, reduces the risk of leaks, and avoids problems with engine starting and running smoothness.

Benefits of Using an Original BMW Fuel Rail

Using a factory fuel rail in an N57 engine translates into a number of practical advantages in daily operation:

• Full compatibility with the common rail system – maintaining proper fuel flow and pressure parameters.
• Stable diesel engine operation – uniform supply to all cylinders, contributing to smooth engine performance.
• Reduced risk of control unit errors related to fuel pressure and injection dosing.
• Improved running smoothness under load – correct cooperation with injectors and engine ancillaries.

Condition, Verification, and Vehicle Selection

The rail is a used part, allowing for an economical restoration of the injection system's functionality while maintaining the original manufacturer's specifications. Before installation, a standard check of the fuel system's tightness is recommended, along with verification of correct selection for the specific N57 engine version.

When replacing the fuel rail, it is also advisable to check the condition of the injectors, high-pressure lines, and control ancillaries to minimize the risk of recurring faults and ensure stable operation of the entire fuel system.

Technical Support and Diesel System Knowledge

If you want to better understand how injection problems manifest in diesel engines and when replacing fuel system components is necessary, check out our guide: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. This is a practical addition to your knowledge when planning repairs or upgrades to the injection system.

Related BMW Injector Nozzles

If you are looking for other BMW injector nozzles compatible with your model, check out our dedicated category: BMW injector nozzles. This will help you easily assemble fuel system components that meet your engine's technical requirements.

For E90 series users interested in a broader context of operation and common engine unit problems, the following material may also be useful: BMW E90 Problem Engines: Find Out What Can Ruin Your Budget!, which helps to consciously plan servicing and investments in engine ancillaries.