BMW E81 E87 LCI E90 E91 E92 F20 F21 F30 F31 118d 318d N47 Injector Fuel 7798446

BMW E81 E87 LCI E90 E92 F20 F30 118d 318d N47 Fuel Injector 7798446 is an original, used BMW injector nozzle designed for N47 diesel engines in popular 1 Series and 3 Series models. This component comes from the OEM line, ensuring proper operating parameters for the injection system and stable engine performance.

Specifications and technical data

• SKU: 7798446-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7798446
• Substitutable numbers: 13537798446, 7798446
• Category: Fuel Injectors

Application and Compatibility

The presented BMW injector nozzle is used in N47 diesel engines fitted in, among others, compact BMW 1 Series models (E81, E87 LCI, F20) and 3 Series sedans and coupes (E90, E92, F30) in the 118d and 318d versions. Using an OEM part guarantees a correct fit to the cylinder head, proper sealing in its seat, and correct interaction with the factory engine control unit.

By maintaining the factory injection characteristics, the component helps to sustain stable common rail pressure, uniform fuel delivery, and predictable throttle response, which translates to smooth operation and fuel economy.

Construction and Performance Parameters

This injector belongs to the Injector Nozzles category and is a precision component responsible for atomizing fuel in the combustion chamber. The OEM construction ensures:

• Precise fuel atomization – the correct spray pattern and fine droplets promote efficient mixture combustion.
• Stable idle operation – uniform delivery reduces vibrations and RPM fluctuations.
• Exhaust emission control – correct fuel injection supports the exhaust gas aftertreatment system.
• Appropriate engine dynamics – maintaining factory injection parameters allows for the N47 unit's nominal performance to be preserved.

As an OEM component, the injector is designed to operate under the demanding thermal and pressure conditions typical of modern BMW diesel engines.

Condition, Origin, and Service Application

The offered injector is a used part, sourced from a dismantled BMW vehicle. This type of component is often chosen as a service solution when a single injector nozzle needs replacement, and maintaining the original specification at a reasonable repair cost is a priority.

In workshop practice, a used OEM injector is effective as:

• a replacement for a damaged nozzle in a single cylinder,
• a component for testing and diagnostics in specialized diesel service centers,
• a part for rebuilding the injection system in fleet and private vehicles.

Before installation, the standard workshop procedure is recommended: verification of parameters on a test bench and installation using new washers and seals according to the manufacturer's recommendations.

Benefits of Using an Original BMW Injector Nozzle

Using an original injector nozzle in an N47 engine allows for maintaining:

• consistent cylinder-to-cylinder operating characteristics – important at low and medium engine speeds,
• predictable fuel consumption – thanks to preserved factory fuel quantities and injection timings,
• reduced risk of cold start problems – correct fuel atomization facilitates mixture ignition,
• stable interaction with engine electronics – the control unit does not require adaptation to non-original characteristics.

For BMW 1 Series and 3 Series owners with an N47 engine, this is a practical way to restore proper injection system function without altering the engine's design.

More BMW Injector Nozzles and Technical Knowledge

If you are looking for other BMW injector nozzles for different models or engine configurations, check out the BMW injector nozzles available in our store to select the right part for your specific engine number and vehicle year.

Before purchasing or installing, it is advisable to familiarize yourself with typical signs of wear and the consequences of neglecting the injection system. Detailed information can be found in the article Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which describes the symptoms, effects, and basics of diagnosing high-pressure injectors.