Fuel Injector BMW F20 F21 F30 LCI Mini F55 F56 Petrol Injector B38 B48 7639990

The BMW F20 F21 LCI Mini F55 F56 Petrol Engine Injector B38 B48 is an original injector nozzle designed for modern BMW and MINI petrol engines from the B38 and B48 families. This part comes from a dismantled vehicle, allowing for an economical yet technically sound repair of the fuel system in vehicles with direct petrol injection.

Specifications and technical data

• SKU: 7639990
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7639990
• Substitutable numbers: 13537639990, 7639990, 13538625396, 8625396
• Fuel type: Petrol
• Category: Fuel Injectors

Application in BMW B38 / B48 Engines

The petrol injector is designed to work in three-cylinder and four-cylinder BMW engines from the B-series family, used in models such as the BMW F20/F21 LCI and MINI F55/F56. The nozzle's construction is adapted to the high operating pressures typical of direct petrol injection, enabling precise fuel metering across a wide range of loads and engine speeds.

A properly selected injector is crucial for:

• stable engine operation at idle and during acceleration,
• maintaining the correct fuel-air mixture across the entire RPM range,
• reducing fuel consumption while preserving the engine's full dynamics.

Technical Characteristics of the Injector Nozzle

The presented injector nozzle belongs to the Injector Nozzles category and is intended for petrol fuel supply systems. The atomizer's geometry and valve opening characteristics are matched to the engine control unit maps used in B38/B48 engines, ensuring factory operating parameters are maintained.

Key features of this component include:

• precise petrol atomization directly into the combustion chamber,
• compatibility with factory ECU control in BMW and MINI engines,
• suitability as an OEM replacement part for the factory-fitted injector.

Benefits of Using an Original BMW Injector Nozzle

Choosing an original injector nozzle for a B38/B48 petrol engine allows you to maintain the operating parameters specified by the vehicle manufacturer. The appropriate fuel flow characteristics and spray pattern contribute to:

• even mixture combustion in each cylinder,
• reduced risk of knocking and combustion chamber overheating,
• stable engine performance under load and during city and highway driving.

Using components that comply with factory specifications is particularly important in modern direct petrol injection engines, where even minor deviations in injection parameters can lead to control unit errors, increased fuel consumption, or uneven engine operation.

Component Condition and Installation Aspects

The offered injector is a used part, sourced from a dismantled BMW/MINI vehicle. This type of part is an attractive solution for users seeking a technically sound repair while maintaining reasonable service costs, especially when multiple nozzles need replacement simultaneously.

Before installation, it is recommended to:

• check the fuel system for leaks after installing the injector,
• verify engine operating parameters using computer diagnostics,
• check injector quantity adjustments in the engine control unit after the initial operating cycles.

Diagnostics and Technical Knowledge

Although the presented component is for a petrol engine, the operating principle and typical symptoms of injector wear are similar to solutions used in diesel engines. If you want to better understand how injection faults affect engine operation, it is worth familiarizing yourself with the guide: diesel injector faults – symptoms, consequences, and diagnostics. Knowledge in this area helps to quickly identify irregularities in petrol systems as well.

If you are looking for other BMW injector nozzles for your car, check out our dedicated offer: BMW injector nozzles. This will help you easily select parts that fit your specific model and engine version.