Fuel Injector BMW E81 E87 LCI E90 E91 E92 F20 F30 118d 318d N47 Diesel 7798446

Visual condition of the part

The product shows signs of use visible in the photos.

Fuel Injector BMW E81 E87 LCI E90 E91 E92 F20 F30 118d 318d N47 Diesel is an original diesel engine fuel system component designed for precise fuel dosing. This injector from the Injector nozzles category ensures stable operation of the N47 unit, supporting uniform combustion, smooth engine performance, and proper dynamics. It is a solution for users seeking a proven OEM component for professional repair or replacement in a BMW diesel injection system.

Specifications and technical data

• SKU: 7798446-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7798446
• Substitutable numbers: 13537798446, 7798446, 13537812881, 7812881, 13537798447, 7798447
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and function of the fuel injector

The presented injector is a component of the diesel fuel system for BMW 1 and 3 series, including the 118d and 318d versions with the N47 engine. Its task is to precisely atomize fuel in the combustion chamber, which translates into correct performance, reduced smoke emissions, and proper operation of engine control systems. A properly selected injector nozzle is crucial for maintaining the correct pressure in the common rail and preserving factory parameters.

Benefits of using an original BMW injector nozzle

Using an original fuel injector in the N47 engine allows you to maintain compatibility with engine control unit maps and the operating characteristics of the factory injection system. As a result:

• you maintain stable idle speed and smooth engine operation,
• you reduce the risk of power loss and jerking during acceleration,
• you support the proper operation of exhaust emission control systems,
• you minimize the risk of damage to other fuel system components.

Choosing an original BMW injector nozzle is the preferred solution for professional repairs, where compatibility with factory engine equipment and predictable component behavior during long-term operation are essential.

Technical characteristics and compatibility with the diesel system

The fuel injector is designed to work in a diesel-powered engine within a high-pressure common rail system. The nozzle design is adapted to the operating pressure parameters and control methods of the factory BMW engine controller, allowing for the maintenance of the correct fuel spray pattern and injection timing. The product has an assigned OEM part number and associated interchangeable numbers, which facilitates clear identification and selection for a specific engine configuration.

Component condition and service application

The offered injector is an aftermarket component, which allows for an economical repair of the injection system while maintaining the manufacturer's original specifications. This type of component is often chosen in situations where it is necessary to replace a single injector nozzle or several units as part of a comprehensive N47 engine service. In workshop practice, this represents a favorable compromise between repair costs and maintaining compliance with the engine's factory design.

Diagnostics and prevention of the injection system

When replacing a fuel injector in a diesel engine, it is worth paying attention to symptoms typical of nozzle wear, such as starting difficulties, increased smoke, or uneven operation on a cold engine. To better understand the symptoms of damage and the consequences of neglect in this area, check out our guide: Diesel injector faults – how to recognize them and the risks of neglecting them. Knowledge in this area facilitates the decision to replace and helps in the proper diagnostics of the entire fuel system.

If you are planning a comprehensive repair or upgrade of the injection system area in your BMW and need other components from the same group, such as additional injectors, fuel rails, or fuel return elements, check out the available parts in the BMW injector nozzles category.