BMW E81 E87 LCI E90 E91 E92 Pressure Hose Assembly Pipe Diesel N47

BMW E87 E90 E91 E92 N47 Fuel Pressure Line is a component of the diesel fuel supply system in BMW diesel engines, responsible for safely delivering high-pressure fuel to further components. As part of the Injector Nozzles category, the line works with a precise injection system, contributing to the stable operation of the power unit. A used OEM component allows for an economical yet technically correct replacement of the part in the fuel system.

Specifications and technical data

• SKU: 7797884
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797884
• Substitutable numbers: 13537797884, 7797884
• Fuel type: Diesel
• Category: Fuel Injectors

Application in BMW N47 Engines

The fuel pressure line is designed for installation in BMW E87, E90, E91, and E92 models with the N47 unit powered by Diesel fuel. It is responsible for transporting diesel fuel at the appropriate pressure from the fuel preparation components to the rest of the system, including the area where the injector nozzles operate. A correctly selected line is crucial for:

• maintaining stable pressure in the diesel engine's supply system,
• reducing the risk of leaks and power loss,
• ensuring uniform injector operation across the entire load range.

Technical Characteristics and Role in the Injection System

In modern BMW N47 diesel units, the injection system operates at very high working pressures, therefore the fuel pressure line must be appropriately designed for durability and resistance to pressure pulsations. As a component related to injector nozzles, the line:

• transfers fuel in a controlled manner, minimizing pressure fluctuations,
• supports precise diesel fuel metering by the injectors,
• limits the possibility of gas bubbles forming in the fuel, which improves engine running smoothness.

Thanks to its design that meets manufacturer requirements, the line maintains appropriate rigidity and sealing, which is important for the long-term operation of diesel units.

Condition, Selection, and Benefits of Using OEM Parts

The offered fuel pressure line is a used component, originating from the original BMW fuel supply system. Choosing a used OEM part allows for maintaining the original geometry and operating parameters of the system while reducing repair costs. This solution is particularly beneficial for:

• repairs after a diesel engine injection system failure,
• fixing fuel line leaks,
• comprehensive refurbishment of the area where injectors and associated components operate.

Selecting a line compatible with the N47 unit and the specific E87/E90/E91/E92 body generation reduces the risk of installation problems and ensures proper routing of the fuel line in the engine bay.

Injection System Diagnostics and Prevention

In case of starting problems, power loss, smoking, or uneven diesel engine operation, it is advisable to perform a full diagnostic of the injection system, including the fuel pressure lines. Symptoms of damaged injectors and associated components are described in more detail in the article: Diesel Injector Faults – How to Recognize Them and What Their Neglect Threatens. The knowledge from this material helps assess when replacing the fuel pressure line is justified as part of a broader repair.

Other BMW Injector Nozzles and System Expansion

If you are planning comprehensive service for your BMW's fuel system and also need other components from the BMW injector nozzles category, check out the BMW injector nozzles available in our store. This allows you to select compatible components in one place, which simplifies repair planning and reduces the risk of incorrect part matching.