Fuel Rail BMW F90 M5 F91 M8 G11 G15 G30 5-8 Cyl Petrol High Pressure 7852403

The BMW F90 M5 G11 G15 G30 Fuel Rail is an original component of the gasoline fuel system, designed for precise cooperation with premium BMW engines. It ensures stable injector supply, which translates to smooth engine operation and predictable performance.

Specifications and technical data

• SKU: 7852403
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7852403
• Substitutable numbers: 7852403, 13537852403
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The BMW fuel rail operates within the gasoline system, responsible for uniform fuel distribution to individual injectors. A correctly selected fuel rail is crucial for:

• maintaining stable fuel pressure across the entire engine load range,
• precise gasoline dosing by the injectors,
• limiting air-fuel mixture fluctuations, which contributes to smoother operation and lower fuel consumption.

This component is particularly important in modern BMW units, where the injection system operates under high load and requires consistent fuel supply parameters.

Construction and Injector System Compatibility

The fuel rail is designed as part of the injector nozzle category, taking into account the requirements of BMW F and G series gasoline engines. The construction includes:

• precise injector seats, ensuring a sealed fit and proper positioning in the cylinder head,
• flow channels optimized for gasoline, which minimizes pressure drops along the length of the rail,
• connection points for the fuel system, enabling correct integration into the factory fuel supply system.

By maintaining factory geometry, the fuel rail works with original mountings and accessories, facilitating installation and servicing.

Benefits of Using an Original BMW Fuel Rail

Choosing an original fuel rail for BMW F90 M5, G11, G15, or G30 allows you to maintain engine operating parameters in line with the manufacturer's specifications. The key benefits include:

• maintaining factory fuel supply characteristics – stable fuel pressure and repeatable injection volumes,
• better cooperation with the control electronics – the engine control unit operates within the parameters intended for original equipment,
• reducing the risk of uneven engine operation resulting from fuel distribution issues,
• easier diagnostics – injection system parameters correspond to BMW reference values.

This solution is especially important in high-performance vehicles where the fuel system operates under demanding thermal and pressure conditions.

Component Condition and Installation Aspects

The fuel rail comes from the used BMW parts offering, allowing for economical repair of the fuel system while maintaining original specifications. Before installation, it is recommended to:

• check the system for leaks after installation in the vehicle,
• verify the condition of the injectors cooperating with the fuel rail,
• monitor engine operating parameters (injection corrections, fuel pressure) during a test drive.

A correctly installed fuel rail supports stable engine operation and facilitates further diagnostics of potential fuel system faults.

More Information and Technical Materials

If you are looking for other BMW injector nozzles suitable for various models of this brand, check out our dedicated category: BMW injector nozzles. There you will find a wide selection of fuel system components for many engine variants.

To deepen your knowledge about diagnostics and symptoms of fuel system problems in diesel engines, it is worth reading the article: Diesel injector faults – how to recognize them and what are the consequences of neglecting them. Although it concerns diesel units, it describes universal principles for evaluating injector operation and approaches to fuel system diagnostics.

If you are interested in a broader perspective on the market for original used parts, the guide may also be helpful: best used car parts – a compilation of popular original components, which discusses practical criteria for selecting used components for popular car models.