Fuel Rail BMW F20 F30 LCI F32 X1 F48 B48 High Pressure Petrol Rail 7639979

The BMW F20 F30 LCI F32 X1 F48 B48 Fuel Rail 7639979 is an original gasoline fuel system component designed for modern B48 units in BMW F-series models. The rail ensures stable gasoline supply to the injectors at the correct pressure, which translates to smooth engine operation and predictable throttle response.

Specifications and technical data

• SKU: 8694198-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8694198
• Substitutable numbers: 13538694198, 8694198, 13537639979, 7639979
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Role in the Injection System

The described fuel rail for B48 engines operates within the gasoline fuel system, distributing fuel to individual injectors. It is a crucial element for maintaining proper fuel pressure in modern BMW units, especially in F20, F30 LCI, F32, and X1 F48 models.

Thanks to its precise design, the rail helps in:

• maintaining stable gasoline pressure across the entire engine load range,
• ensuring uniform fuel supply to all cylinders, which reduces vibrations and uneven engine operation,
• optimizing the combustion process, contributing to lower fuel consumption and improved running smoothness.

Construction and Fitment for Gasoline Units

The rail has been specifically designed for BMW gasoline injection systems. The geometry of the connectors, mounting points, and injector seat placement are adapted to the B48 engine architecture and the engine bay of F-platform vehicles.

This precise fit allows for:

• seamless installation in place of the original component without the need for modifications,
• proper routing of fuel lines and connectors, in accordance with factory BMW specifications,
• preservation of the original injection system operating characteristics, which is important for the engine control unit and injection maps.

Benefits of Using an Original BMW Fuel Rail

Using an original fuel rail in a BMW gasoline engine brings tangible operational benefits. This component works with factory-supplied accessories, which reduces the risk of leaks and fuel pressure issues.

• Compatibility with Gasoline Systems – the rail is designed to work with petrol fuel, ensuring appropriate material resistance and durability.
• Stable Engine Operation – a properly functioning rail minimizes pressure drops that can cause jerking, power loss, or control unit errors.
• Diagnostic Support – maintaining the original system configuration facilitates the work of mechanics and diagnosticians, especially with advanced BMW B48 units.

Practical Application in Service

Replacing the fuel rail is recommended in cases of mechanical damage, leaks, or problems with maintaining fuel pressure in the gasoline system. In BMW F-series vehicles, where the injection system operates under high load, a functional rail directly impacts the safety and reliability of the powertrain.

It is worth remembering that symptoms such as difficulty starting a warm engine, power loss, or uneven idling may be related not only to the injectors themselves but also to the fuel distribution components. In the context of diagnosing injection systems, an article describing common injector problems might be helpful, available at the link: diesel injector faults – symptoms and diagnostics.

Other BMW Injector Nozzles

If you are looking for other components in the BMW injector nozzles category for your car, check out the full offer in our catalog. You will find a wide selection of components designed for various models of this brand: BMW injector nozzles.