BMW 3 Series E46 Petrol Fuel Injector Tube Rail Pipe 7521634 7506158

BMW E46 Petrol Fuel Rail is an original fuel system component designed for petrol engines of this BMW generation. It ensures stable fuel delivery to the injectors, which translates into predictable engine operation and proper compatibility with the factory engine control unit.

Specifications and technical data

• SKU: 7521634
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7521634
• Substitutable numbers: 13537521634 13537506158, 7521634 7506158, ŁS
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Role in the Fuel System

The BMW E46 Petrol Fuel Rail operates at the central point of the fuel system, distributing fuel to individual injectors. The appropriate channel geometry and fit to the engine head allow for maintaining uniform fuel pressure across all cylinders, which is crucial for correct mixture composition and stable RPMs.

This component works in conjunction with factory petrol injectors, fuel lines, and control accessories, forming a cohesive, stock fuel system. This preserves the factory engine performance characteristics and reduces the risk of starting issues or hesitation during acceleration.

Construction and Fit for BMW

The rail has been specifically designed for the architecture of BMW E46 petrol engines, taking into account cylinder spacing, port positions, and mounting points. The appropriate body shaping facilitates fuel line routing and ensures collision-free installation with other engine bay components.

Original manufacturing ensures:

• secure fitment to the cylinder head and factory brackets,
• correct injector positioning relative to the intake ports,
• compatibility with stock fuel system accessories.

Performance Characteristics in a Petrol Engine

As a fuel system component for a petrol engine, the rail operates under variable pressure and temperature conditions. The manufacturer's design allows for maintaining stable fuel flow parameters at both low and high RPMs, supporting even combustion in each cylinder.

A correctly selected fuel rail helps in:

• maintaining predictable engine behavior under load,
• reducing power losses resulting from insufficient fuel supply,
• stabilizing idle operation and during sudden load changes.

Condition, Origin, and Service Application

The offered fuel rail is a used part from a dismantled vehicle, allowing for economical repair of the fuel system while maintaining the original manufacturer's specifications. It is a practical solution for workshops and owners who want to restore fuel system functionality without altering the factory design.

Replacing the fuel rail is particularly advisable in cases of problems with uniform cylinder fuel supply, leaks around the rail, or mechanical damage incurred, for example, during previous repairs.

Technical Support and Related Content

If you are looking for other BMW injector nozzles for your car, check out our dedicated category: BMW injector nozzles. There you will find a wide selection of fuel injection system components tailored to various models of this brand.

Although the presented rail is for a petrol engine, when diagnosing fuel injection system problems, it is useful to know the typical symptoms of malfunctions. An article describing the symptoms and consequences of neglecting the fuel system may be helpful: diesel injector malfunctions – how to recognize them and what are the consequences of neglecting them. Knowledge about injector operation, even in diesel engines, helps in understanding the general principles of modern injection systems.

If you are interested in how the use of original dismantled parts affects vehicle downtime in the workshop, check out the material: availability of car parts on hand vs. repair time – how used OEM parts shorten workshop stays. This is a practical addition to knowledge for workshops and informed users.

Summary

The BMW E46 Petrol Fuel Rail is a functional, original fuel system component that allows for restoring the stock operating parameters of a petrol engine. Thanks to its fit to the engine's construction and compatibility with factory accessories, it is a sensible choice for repairs and upgrades performed while adhering to manufacturer standards.