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

BMW F20 F21 F30 F31 LCI B47 Fuel Rail 8514154 is an original high-pressure fuel system component designed for modern BMW F-series diesel engines. The fuel rail ensures stable fuel supply to the injectors at the correct pressure, which translates to smooth engine operation and proper combustion characteristics.

Specifications and technical data

• SKU: 8514154-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8514154
• Substitutable numbers: 13538514154, 8514154, EM
• Category: Fuel Injectors

Purpose and Role of the Fuel Rail

The fuel rail in the B47 engine plays a crucial role in the common rail system – it stores fuel under high pressure and distributes it to individual injectors. In BMW F20, F21, F30, and F31 LCI (Life Cycle Impulse) vehicles, a properly functioning fuel rail is essential for:

• maintaining stable fuel pressure across the entire engine load range,
• precise fuel delivery by the injectors,
• reducing pressure fluctuations in the system, contributing to a smoother engine operation,
• ensuring compatibility with the engine control unit maps and the manufacturer's injection strategy.

Construction and Technical Characteristics

The fuel rail in this series is a common rail system component designed by BMW for high durability and consistent performance. Its construction includes:

• a high-strength body, designed to operate under very high fuel pressure,
• precise injector connection ports, ensuring a tight seal and proper fuel flow,
• integrated connection nipples for high-pressure lines and the pump,
• factory mounting points adapted to the structural layout of the B47 engine in F20/F21/F30/F31 LCI versions.

This type of fuel rail is designed to work with the engine control electronics, maintaining appropriate system volume and pressure pulsation damping, which is important for emissions and vehicle dynamics.

Benefits of Using an Original BMW Fuel Rail

Using a genuine BMW OE part allows you to maintain the original performance parameters of the fuel system. The key benefits include:

• perfect fit for the B47 engine in F20, F21, F30, and F31 LCI models, without the need for modifications to mounting points or lines,
• maintaining the factory pressure characteristics across the entire RPM range,
• reducing the risk of leaks at the connections with injectors and high-pressure lines,
• compatibility with the original engine control unit software, facilitating diagnostics and calibration.

Component Condition and Service Application

The offered BMW fuel rail comes from the Injector Nozzles category, highlighting its direct connection to the precise fuel supply system of a diesel engine. It is particularly useful in situations where the existing component shows signs of wear, mechanical damage, or problems with maintaining fuel pressure.

Replacing the fuel rail is recommended, among other things, for:

• recurring fuel pressure errors in the control unit's memory,
• common rail system leaks around the fuel rail,
• mechanical damage to the body or connection threads.

Technical Support and Educational Materials

When working with the common rail system, it's important to consider the condition of the entire fuel supply path, including the injectors. If you want to better understand common problems with this system, their symptoms, and the potential consequences of neglect, check out the article: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails. This is a practical addition to your knowledge when planning repairs or upgrades to the fuel system.

If you are looking for other parts from the BMW Injector Nozzles category for your car, check out the available products in our section: BMW Injector Nozzles. This will help you easily assemble the remaining fuel system components that meet the manufacturer's requirements.