Injector Set BMW F20 F30 LCI Mini F60 Petrol B38 Fuel Injector X3 7639990

BMW F20 F30 LCI Mini F60 Petrol B38 Fuel Injector Set X3 7639990 is a set of three injector nozzles designed for B38 petrol engines in BMW F-series and Mini models. The set provides a functional service solution for users seeking reliable fuel supply system components.

Specifications and technical data

• SKU: 7639990-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7639990
• Substitutable numbers: 13537639990, 7639990, 13538625396, 8625396
• Fuel type: Petrol
• Category: Fuel Injectors

Technical Characteristics of the Injector Set

The presented petrol injector set for BMW and Mini belongs to the Injector Nozzles category, meaning it is responsible for precise fuel metering in modern B38 units. The injector design is adapted to the requirements of three-cylinder engines with direct petrol injection, where stable pressure and a repeatable fuel spray pattern are crucial.

The set of three pieces allows for consistent servicing of the entire cylinder bank, which simplifies maintenance and reduces the risk of differences in individual cylinder performance. The use of original BMW solutions ensures proper compatibility with the factory engine control unit and ignition system.

Application in B38 Petrol Engines

The injectors in this set are designed for B38 petrol units, used in, among others, BMW F20, F30 LCI, and Mini F60. These engines utilize an advanced fuel injection system where the correct operation of the nozzles directly impacts:

• stable idle operation, without misfires,
• proper acceleration dynamics, especially at low and medium RPMs,
• maintaining an optimal air-fuel mixture, which contributes to lower fuel consumption,
• reduced exhaust emissions and correct interaction with the catalytic converter and lambda sensors.

By maintaining factory fuel flow parameters, the set is suitable for service applications in vehicles used in both urban traffic and on longer journeys.

Benefits of Installing Original Injector Nozzles

Choosing original BMW injector nozzles over aftermarket alternatives helps reduce the risk of engine control unit adaptation issues and improper operation under load. Key advantages of this set include:

• consistency of parameters for all three injectors, facilitating diagnostics and calibration,
• compatibility with the factory ECU software used in B38 units,
• maintaining predictable engine behavior across the full RPM range,
• the possibility of using the existing fuel system without structural modifications.

A set configured in this way is particularly useful for comprehensive fuel system servicing when existing injectors show signs of wear, such as uneven running, increased fuel consumption, or difficulty starting a warm engine.

Product Condition and Application in Service Practice

The offered set belongs to the group of used BMW injector nozzles, representing a reasonable compromise between repair cost and maintaining original manufacturer specifications. Such components are often chosen by workshops specializing in the BMW brand and by informed users who prefer OEM parts at a more favorable price.

During installation, it is recommended to:

• perform computer diagnostics before and after replacement,
• check the fuel system for leaks after installing the set,
• verify engine operating parameters (injector trims, adaptations) to confirm correct operation.

BMW Injector Nozzles – Related Offers and Technical Knowledge

If you are looking for other BMW injector nozzles compatible with different models and engine versions, check out our dedicated category: BMW injector nozzles. There you will find a wide selection of fuel injection system components for many series and generations.

When working with fuel injection systems, it is useful to know the typical symptoms of wear. Although the presented article concerns diesel units, many diagnostic principles remain similar – more information can be found here: diesel injector faults – symptoms, consequences, and diagnostics. This will help you better understand the importance of functional injectors for engine longevity and driving comfort.

For those considering broader modifications or repairs using used parts, a guide on safely choosing components may also be useful: buying used car parts and common mistakes in tuning. This is a practical supplement to your knowledge when planning your budget and scope of service work.