Fuel Pressure Hose BMW E87 LCI E90 E91 120d 320d 520d N47 Diesel Injection Pipe

BMW E87 LCI E90 N47 Diesel Fuel Line is an original part of the diesel fuel supply system, designed for BMW diesel engines from the N47 family. Designed as part of the factory injection system, it ensures stable fuel delivery and supports the proper operation of injector nozzles in facelifted BMW 1 and 3 Series models.

Specifications and technical data

• SKU: 7800604
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7800604
• Substitutable numbers: 13537800604, 7800604
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The Diesel Fuel Line for BMW E87 LCI and E90 with N47 engine operates in close proximity to the injector nozzles, responsible for the precise delivery of fuel under high pressure. A correctly selected fuel line is crucial for:

• maintaining stable fuel pressure in the fuel rail and at the injectors,
• limiting performance drops of the diesel unit,
• reducing the risk of leaks at critical points of the fuel supply system.

This component works with factory injector nozzles, allowing the engine's operating characteristics to be maintained in accordance with BMW's design specifications.

Benefits of Using an Original Fuel Line

Choosing a fuel line from the Injector Nozzles category, dedicated to BMW diesel engines, offers a range of practical advantages:

• Factory geometry and bore diameter – maintaining correct fuel flow to the injectors, without undesirable restrictions.
• Compatibility with the common rail system – the line is adapted to the pressure loads typical for modern diesel units.
• Proper routing and mounting – correct positioning relative to the cylinder head and injectors reduces vibrations and fatigue stress.
• Consistency with factory configuration – no need for modifications, adjustments, or adapters.

Condition of the Part and Application in Service Practice

The fuel line is a used part, making it an attractive cost-effective alternative to new components, while maintaining original BMW specifications. This type of part is particularly useful in situations where:

• the existing fuel line has been mechanically damaged (e.g., during injector removal),
• leaks are present around the injector nozzles or fuel rail,
• a section of the fuel supply system needs replacement as part of an N47 engine repair.

Using an original fuel line helps maintain the integrity of the entire injection system and facilitates the diagnosis of potential future faults.

Technical Support and Knowledge of Diesel Injection Systems

To better understand the impact of the condition of fuel lines and injector nozzles on diesel engine operation, it is worth reading the guide: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails. This will allow you to consciously assess when replacement of fuel supply system components is justified and how it can translate into the smoothness of the engine's operation.

Other BMW Injector Nozzles

If you are planning a more extensive intervention in the fuel supply system during repairs, you may consider selecting other BMW injector nozzles from the same product group. Check the available BMW injector nozzles to select compatible components for your specific engine configuration and scope of service work.