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

BMW F20 F21 F30 LCI Mini F55 F56 B38 B48 Petrol Fuel Injector 7639990 is an original injector nozzle designed for BMW and MINI petrol engines, engineered for the demanding B38 and B48 units. This component ensures precise fuel delivery, stable engine operation, and proper compatibility with the factory engine control unit.

Specifications and technical data

• SKU: 7639990-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7639990
• Substitutable numbers: 13537639990, 7639990, 13538625396, 8625396, 7643082
• Fuel type: Petrol
• Category: Fuel Injectors

Application in BMW B38/B48 and MINI Engines

The presented fuel injector belongs to the category of injector nozzles and is intended for modern, turbocharged BMW petrol engines of the B38 and B48 series, used in models such as BMW F20, F21, F30 LCI, and MINI F55 and F56. The injector's design is adapted to the characteristics of these units – high injection pressure, direct petrol delivery to the combustion chamber, and operation across a wide range of loads.

A properly selected injector nozzle is crucial for:

• stable engine operation across the entire RPM range, without jerking or misfires,
• maintaining factory performance and proper throttle response,
• controlling fuel consumption and exhaust emissions in accordance with manufacturer specifications.

Injector Nozzle Construction and Operating Characteristics

The petrol injector in this model is a precision component operating in a high-pressure system. The design of the nozzle allows for the creation of a specific fuel spray pattern, which translates to uniform cylinder filling and efficient mixture combustion.

• Precise Dosing – controlling the injector's opening time allows for accurate fuel quantity adjustment based on current engine load.
• Stable Spray Pattern – optimized spray angle and atomization of petrol improve the unit's running smoothness, especially at idle.
• Control System Compatibility – the injector works with the factory ECU, maintaining parameters specified for the given engine map.

Benefits of Using an Original BMW Injector Nozzle

Choosing the correct fuel injector for a petrol engine directly impacts the powertrain's durability and the vehicle's user comfort. Using an original BMW injector nozzle ensures:

• maintenance of factory operating parameters – no need for adaptation or modification of the control unit software,
• consistency with other components of the injection system (high-pressure pump, fuel rail, sensors),
• reduced risk of operational issues, such as uneven cold running, increased fuel consumption, or excessive load on the catalytic converter.

For modern petrol units, especially those with direct injection, the quality and fit of the injector are crucial for maintaining the correct fuel-air mixture and protecting components like the turbocharger or the exhaust system filter.

Item Condition and Installation Aspects

The offered fuel injector is a used component, sourced from an original BMW injection system. This type of part is a good solution for users seeking a technically sound component at a reasonable price, while maintaining compliance with factory specifications.

Before installation, it is recommended to:

• check the fuel system for leaks and the condition of the injector seats in the cylinder head,
• replace seals according to the manufacturer's service procedure,
• adapt the injector in the engine control unit, if required by the specific powertrain.

A correctly installed injector nozzle can restore proper engine operation in cases of previous fuel delivery issues, uneven running, or ECU error codes.

Diagnostics and Technical Knowledge

Although this component is for a petrol engine, the operating principle and typical symptoms of injector wear are similar to those found in diesel units. To better understand the symptoms of damage and diagnostic methods, it is worth familiarizing yourself with the material describing diesel injector faults – symptoms, consequences, and diagnostics. This will help you better assess the condition of your car's injection system and plan repairs more effectively.

Other BMW Injector Nozzles

If you are looking for other BMW injector nozzles for different models or engine configurations, check the available items in our offer: BMW injector nozzles. This will allow you to easily compare available variants and select the component suitable for your specific engine code and vehicle year.