BMW F20 F21 114d 116d ed N47N 116HP Set Injector Fuel Pump Injection System

The BMW F20 F21 114d 116d ed N47N Injector Set is a complete set of fuel system components designed for the N47N diesel engine in BMW 1 Series F20 and F21 models, specifically the 114d and 116d EfficientDynamics versions. This set belongs to the injector nozzles category and is a solution for users seeking a factory fit and consistent injector system operation.

Specifications and technical data

• SKU: 8577650-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577650
• Substitutable numbers: 13518577650 13518573250, 8577650 8573250, 0445010540 8515058 13538514166 0445214278 13538515060 0445110103, 0 445 010 540, 8515058, 8514166, 0 445 214 278, 8515060, 0 445 110 103
• Category: Fuel Injectors

Application and Compatibility with BMW F20/F21

The presented injector set for BMW F20 F21 114d 116d ed N47N has been designed with specific engine variants in mind, ensuring proper operating parameters, accurate fuel delivery characteristics, and compatibility with the factory control electronics. This allows the injection system to maintain correct operating pressures and injection times, resulting in stable engine performance across the full load range.

Being original BMW OE parts means that the geometry, mounting points, and fuel connections are identical to the factory solutions used in the 1 Series, which simplifies installation and reduces the risk of fitment issues.

Technical Characteristics of the Injector Set

The set includes components from the injector nozzles category, responsible for precise fuel atomization in the combustion chamber. In the N47N engine, the correct operation of the injectors is crucial for:

• maintaining smooth idle operation and reducing engine vibrations,
• stable cold starts, especially at lower ambient temperatures,
• exhaust emission control and cooperation with the exhaust gas treatment system,
• maintaining factory fuel consumption in Eco/ED modes and during highway driving.

A properly selected injector set allows for the restoration of engine operating parameters to values close to factory specifications, which is important for both engine durability and driving comfort.

Condition, Verification, and Service Application

The components included in the set are sourced from the used BMW OE parts circulation. Such components are often chosen by professional workshops as an economical alternative to new parts, especially for maintenance repairs or restoring the performance of higher-mileage vehicles.

By maintaining the original manufacturer's specifications, it is possible to:

• recreate the correct injection characteristics without the need for engine control unit software modifications,
• maintain compatibility with factory injection maps used in the 114d and 116d ed versions,
• reduce the risk of diagnostic errors associated with incorrectly selected aftermarket parts.

Benefits of Installing Original BMW Injector Nozzles

Choosing an original injector set for the N47N engine offers a number of practical advantages:

• Factory Fitment – maintaining the correct length, spray angle, and fuel flow characteristics, as designed by BMW.
• Consistent Fuel System Operation – uniform delivery to all cylinders, contributing to smooth operation and reducing the risk of localized thermal overload.
• Better Electronic Compatibility – correct communication with sensors and the engine control unit, with reduced susceptibility to adaptation errors.
• Engine Safety – proper fuel metering reduces the risk of excessive smoke, engine oil dilution, and accelerated mechanical wear.

Selection, Diagnostics, and Technical Knowledge

When replacing fuel system components in a diesel engine, correctly identifying the symptoms of wear is crucial. Uneven running, power loss, increased smoke, or starting difficulties can indicate injection problems. More information on typical symptoms and the consequences of neglect can be found in the article: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails.

If you want to gain a broader understanding of the entire fuel system's operation, the process of selecting components by OEM numbers, and regeneration options, the guide will be helpful: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Regeneration.

For expanding or further repairing the fuel system in your car, other BMW injector nozzles may also be useful. Check available variants using the link: BMW injector nozzles.