BMW F20 F21 F30 F31 LCI B47 Fuel Pressure Injection Rail Accumulator 8514154

BMW F20 F21 F30 F31 LCI B47 Fuel Rail 8514154 is a component of the high-pressure fuel supply system in BMW diesel engines, responsible for stable fuel distribution to the injectors. A properly selected fuel rail ensures uniform pressure throughout the system, which translates to the smooth operation of the B47 unit, combustion efficiency, and reduced risk of injector failure.

Specifications and technical data

• SKU: 8514154-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8514154
• Substitutable numbers: 13538514154, 8514154, 0445214315, 0 445 214 315, 851415402, 8 514 154 02
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The presented BMW fuel rail for the B47 engine operates in the common rail system in BMW F20, F21, F30, and F31 facelift (LCI) models with diesel engines. Its task is to buffer and distribute high-pressure fuel to individual injectors, maintaining stable operating parameters across the entire load range.

A properly selected fuel rail is crucial for:

• maintaining stable fuel pressure in the common rail manifold,
• precise diesel fuel metering by the injectors,
• reducing vibrations and pressure pulsations in the supply system,
• decreasing the load on injection components during dynamic driving.

Compatibility and Technical Specifications

The rail is designed to work with Diesel engines in BMW F-series platforms with the B47 unit. The construction corresponds to factory solutions used by the manufacturer, which facilitates installation in place of a worn or damaged component without the need for fuel system modifications.

Thanks to the use of appropriate channel geometry and precise connection sockets, the rail ensures:

• correct fuel delivery to the injectors,
• a sealed connection with high-pressure lines,
• stable cooperation with sensors and injection system accessories.

Characteristics of a Used Part

The offered BMW fuel rail is a used component, removed from a dismantled vehicle. Such elements are often chosen as an economical alternative to new parts, especially for advanced high-pressure systems where the cost of new components is high.

Choosing a fuel rail from the secondary market allows for:

• reducing the cost of injection system repairs while maintaining the original design,
• maintaining compliance with the factory operating parameters of the B47 engine,
• quick replacement of a damaged component without the need for system modifications.

Importance of a Proper Rail for Diesel Injectors

A functional fuel rail directly impacts the lifespan of injectors and the entire common rail system. Incorrect pressure or uneven fuel distribution can lead to accelerated wear of injector tips, starting problems, smoking, or power loss. Therefore, when experiencing symptoms typical of fuel system malfunctions, it is advisable to check both the injectors and the rail itself.

If you want to better understand the symptoms of failures and their consequences, the article: diesel injector failures – symptoms, consequences, and diagnostics will be helpful, providing practical tips for assessing the condition of the injection system.

Selection and Other BMW Injector Nozzles

When replacing the fuel rail, it is recommended to pay attention to compatibility with the specific engine version and vehicle generation. If in doubt, it is advisable to compare the mounting parameters with the currently installed component or seek assistance from a specialist in common rail systems.

If you are looking for other BMW injector nozzles for your model, check the offer in the category: BMW injector nozzles, where you will find a wide selection of components for various diesel engines of this brand.