BMW E90 E91 LCI E92 325d 330d Diesel N57 Set Injector Fuel Pump Injection System

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E90 E91 LCI E92 325d 330d Diesel N57 Set Injector Fuel Pump Injection System is a complete, used set of diesel fuel supply components designed for N57 diesel engines in 3 Series models. It includes key components responsible for precise fuel metering, which directly impacts engine refinement, performance, and starting stability. By maintaining the factory design of the injection system, it provides a solid foundation for repairing or restoring the original fuel supply configuration in your BMW.

Specifications and technical data

• SKU: 7805428-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805428
• Substitutable numbers: 13537805423, 7805423, 13537800124, 7800124, 13537805428, 7805428, 135185776547800123, 8577654, 13517800593, 7800593, 135377999921353779999413537799995, 779999277999947799995, 0445010617, 13537805429, 7805429
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and compatibility with the N57 engine

The presented set is designed for N57 diesel engines used in BMW 3 Series E90, E91 LCI, and E92 models in 325d and 330d versions. The proper configuration of the injection system components allows for maintaining operating parameters in accordance with the manufacturer's specifications, which is particularly important for engines with high torque and advanced control electronics.

The injection system in a diesel engine is responsible not only for fuel delivery but also for its proper atomization and synchronization with engine operation. Using a set matched to a specific generation and engine type reduces the risk of starting problems, power loss, or rough idling.

Characteristics of the Diesel injection system

In diesel-powered engines, stable fuel pressure and precise injector operation are of key importance. A set including injection system components and a fuel pump allows for restoring the correct fuel supply characteristics, which translates into:

• more uniform combustion across the entire rev range,
• better throttle response,
• reduced smoke under load,
• stable starting on both cold and warm engines.

For BMW diesel engines, it is particularly important to maintain high-quality components in the fuel supply area, as any deviations in injector or pump operation can quickly lead to ECU errors, limp mode, or accelerated wear of other components.

Practical application and benefits of installation

Installing the injection system set with the fuel pump to replace worn or damaged parts is a solution that allows for an organized restoration of the entire fuel supply path. Instead of replacing individual components, you can immediately restore a coherent, factory-spec system, which facilitates diagnostics and subsequent operation.

The main benefits of using such a set include:

• increased reliability of the entire diesel fuel system after repair,
• better repeatability of engine operating parameters under various load conditions,
• easier matching to the factory engine control unit software,
• reduced risk of incompatibility between individual system components.

This approach is particularly beneficial for vehicles used intensively, where the predictability of the engine's behavior and the ability to perform further, trouble-free diagnostics are essential.

Condition, origin, and technical aspects

The offered set comes from the original BMW production line, which means it maintains factory standards of workmanship and fitment for the specific engine type. As a used item, this system is intended primarily for users and workshops that want to restore vehicle performance while maintaining the original design concept and controlling repair costs.

The system is dedicated to diesel-powered engines, therefore its use in other powertrain configurations is not intended. Properly matching the set to the specific model and engine version allows you to avoid mechanical and software compatibility issues.

Technical support and additional information

When working with diesel fuel systems, proper diagnostics are key. To better understand the symptoms of wear and the possible consequences of neglect, it is worth reading our guide: diesel injector faults – symptoms, effects, and diagnostic methods. This will allow you to better assess when replacing the entire set is justified and how to plan further service work.

If you are planning a comprehensive repair or upgrade of the diesel engine fuel supply area in your BMW and need other elements from the same group, such as injectors, fuel lines, or fuel rails, check the available parts in the BMW Injector Nozzles category.