BMW F20 F21 N47N 116d 118d F30 318d Fuel Pump Injector Injection System Set

BMW F20 F21 N47N 116d 118d F30 318d Injection System Kit is a complete set of components from the injector nozzles category, designed for BMW diesel engines from the N47N family. The product is suitable for users looking for a factory solution for the fuel supply system, ensuring stable engine operation.

Specifications and technical data

• SKU: 8577649-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577649
• Substitutable numbers: 8577649, 13518577649, 7823453, 13517823453, 8576514, 13518576514, 8509012, 13518509012, 7823452, 7809127, 13537809127, 0445214182, 0 445 214 182, 7798446, 13537798446, 0281002738, 0 281 002 738
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Compatibility

The BMW F20/F21/F30 Injection System Kit has been designed for Series 1 and Series 3 models equipped with the N47N engine in the 116d, 118d, and 318d versions. The design, based on high-pressure diesel injection technology, allows for precise fuel metering, which translates into smooth engine operation, proper running culture, and predictable response to load.

Original BMW origin means maintaining factory fuel system operating parameters, proper geometric fit, and compatibility with the vehicle's standard engine control electronics.

Technical Characteristics of the Injection System

The presented kit from the injector nozzles category operates in a high-pressure system typical of modern diesel engines. The application of diesel technology enables:

• precise fuel dose formation across the entire RPM range, promoting stable engine operation,
• maintaining adequate rail pressure under varying loads, which limits power drops and jerking,
• optimizing the combustion process, helping to maintain correct exhaust emission parameters.

The injection system in a diesel engine is crucial for the durability of the N47N unit – properly functioning injector nozzles reduce the risk of excessive smoking, uneven idling, and starting problems with both warm and cold engines.

Practical Application and Benefits of Installation

Installing the injection system kit in the N47N engine is particularly important in cases of symptoms such as:

• loss of power and flexibility in the low and mid-RPM range,
• uneven idling or noticeable body vibrations,
• increased fuel consumption compared to previous operating values.

Replacing worn injection system components with a functional kit restores correct engine operating parameters, reduces the risk of further damage (e.g., excessive load on the turbocharger or particulate filter), and facilitates the diagnosis of any remaining faults.

Product Condition and Installation Aspects

The offered injection system kit is used, which is a cost-effective solution for users seeking a factory component at a reasonable price compared to new parts. The part comes from disassembly, thus retaining its original BMW specification while enabling an economical repair of the fuel supply system.

Before installation, it is recommended to perform a standard diagnostic procedure on the vehicle (reading fuel correction values, checking rail pressure, verifying fuel line tightness). A correctly performed installation by an experienced workshop allows for seamless integration with the existing N47N engine ancillaries.

Technical Support and Additional Materials

If you need a broader perspective on the diagnosis and symptoms of wear in diesel injection components, it is worth reading the guide article Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails, which discusses typical symptoms, possible consequences of neglect, and basic methods for verifying the system's condition.

If you are looking for other components from the BMW injector nozzles category for your car, check out the BMW injector nozzles available in our store to select components tailored to your specific engine version and vehicle year.