BMW G20 330d G30 530d X3 G01 30dX B57 Fuel Injector Injection Nozzle 8571565

The BMW G20 330d G30 530d X3 G01 30dX B57 Injector is an original component of BMW diesel fuel systems, designed for B57 engines in popular 3 Series, 5 Series, and X3 models. The precisely selected injector nozzle ensures stable diesel engine operation, proper fuel delivery, and predictable performance in everyday use.

Specifications and technical data

• SKU: 8571565
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8571565
• Substitutable numbers: 8571565, 13538571565
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Compatibility

The presented injector is a component from the injector nozzles category, designed to work with the B57 diesel engine in BMW G20, G30, and G01 X3 models in the 30d/30dX versions. The use of the correct injector in these units is crucial for:

• maintaining correct injection pressure across the entire RPM range,
• stable idling and smooth acceleration,
• efficient diesel fuel combustion while maintaining engine refinement.

Selecting an injector compatible with the specific body generation and engine reduces the risk of starting problems, power loss, or excessive smoke.

Technical Characteristics of Diesel Injection

The injector operates within a Diesel common rail fuel system, responsible for precisely delivering fuel to the combustion chamber under high pressure. A properly functioning injector nozzle contributes to:

• accurate fuel atomization, which improves the combustion process and reduces carbon buildup,
• even operation of all cylinders, resulting in reduced vibrations and better engine smoothness,
• maintaining the factory power and torque parameters of the B57 unit.

In BMW diesel systems, the use of an appropriate injector nozzle is particularly important due to multi-phase fuel injection (pilot, main, and potentially post-injection), which requires high repeatability and sealing of the component.

Practical Application and Benefits of Replacement

Replacing a worn injector with a functional component from the BMW G20 330d G30 530d X3 G01 30dX B57 series restores the correct operating parameters of the fuel system. In practice, this means:

• reducing cold start issues and power drops under load,
• decreasing exhaust smoke during acceleration,
• smoother engine operation without jerking or misfires (uneven cylinder performance),
• stable idle speed and better throttle response.

For owners of cars with the B57 engine, this is often a key component in comprehensive fuel system regeneration, especially in vehicles used for long distances and under heavy load.

Component Condition and Installation Aspects

The offered injector is a used part, originating from an original BMW fuel system. This type of component is often chosen as an economical alternative to brand-new parts, while maintaining compliance with factory specifications. Before installation, it is recommended to:

• thoroughly clean the injector seat in the cylinder head and use new sealing washers,
• check operating parameters on a diagnostic bench (if possible),
• adhere to torque specifications and manufacturer procedures during installation.

A correctly installed injector reduces the risk of blow-by, fuel leaks, and thread damage in the cylinder head.

More BMW Injector Nozzles and Technical Knowledge

If you are looking for other BMW injector nozzles compatible with various models and engine versions, check out our BMW injector nozzles category, where you will find a wide selection of fuel system components for this brand's diesel engines.

Before deciding on a replacement, it's worth learning about the typical symptoms of injector wear. These are discussed in detail in the article Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails, which describes the symptoms, possible consequences of neglect, and basic diagnostic methods for the fuel injection system.