Pressure Hose BMW E60 E61 E65 E90 E91 M57N2 Assy Injector Fuel 7804238

The BMW E60 E61 E65 E90 E91 M57N2 Fuel Rail Line is an original component of the BMW diesel engine fuel system, designed for operation in the fuel rail of M57N2 units. The precise design of the line ensures stable fuel delivery to the injectors, which translates to smooth engine operation and correct injection characteristics.

Specifications and technical data

• SKU: 7804238
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7804238
• Substitutable numbers: 13537804238, 7804238, 13537788794, 7788794, 13537804239, 7804239, 13537788795, 7788795
• Category: Fuel Injectors

Purpose and Function in the Injection System

The fuel rail line in the M57N2 engine is responsible for the controlled delivery of high-pressure fuel from the rail to the injectors. A correctly selected component in this location is crucial for:

• maintaining stable fuel pressure throughout the common rail system,
• precise fuel metering by the injectors,
• limiting pressure drops during dynamic engine load changes.

Using a line dedicated to M57N2 units in BMW 5, 7, and 3 Series models allows for the preservation of factory injection system operating parameters and facilitates the diagnosis of potential faults.

Construction and Fitment for BMW M57N2

The BMW Fuel Rail Line is designed as an OEM component, ensuring correct geometry, bore diameter, and end types. This has a direct impact on:

• seal integrity with the fuel rail and injectors,
• resistance to operating pressure typical for common rail systems in M57N2 engines,
• correct routing of the line in the engine bay, without stress or twisting.

By maintaining the original construction, the line integrates with factory mounting points and brackets, simplifying installation and subsequent service.

Benefits of Using an Original Fuel Line

Replacing the fuel rail line with a component that matches the factory specification helps to mitigate common issues associated with diesel engine fuel systems. The most significant benefits include:

• stable injector operation due to maintained proper fuel pressure and flow,
• reduced risk of leaks at critical high-pressure system points,
• easier diagnosis of injection faults by eliminating the factor of a non-original line,
• preservation of factory engine operating parameters in terms of smoothness, dynamics, and fuel consumption.

This solution is particularly recommended for issues with hot starting, rough idling, or power loss, when disruptions in fuel rail supply are suspected.

Product Condition and Service Application

The offered BMW Fuel Rail Line comes from the Injector Nozzles category, highlighting its close relationship with the precision part of the injection system. A used component is a good choice in situations where:

• a quick repair of the fuel system is necessary while maintaining reasonable costs,
• a solution consistent with the factory design is sought, without altering the original BMW project,
• compatibility with the M57N2 unit in specific generations of the 3, 5, and 7 Series is important.

Before installation, a standard check of connection tightness and correct line routing in the engine bay is recommended, in accordance with BMW service procedures.

Technical Support and Additional Materials

To better understand the impact of fuel system components on diesel engine operation, it is worth reading the article discussing symptoms and consequences of diesel injection faults: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. This will help you more effectively diagnose problems related to the fuel rail and fuel lines.

When choosing fuel system components for BMW engines, a guide comparing different approaches to parts selection may also be helpful: Car Parts – New or Used? Comparing Costs, Quality, and Durability. This provides practical support for planning repairs and optimizing service budgets.

If you need other components from the same group, check the available BMW Injector Nozzles in our assortment: BMW Injector Nozzles. This will allow you to easily assemble a complete injection system that meets manufacturer requirements.