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

BMW E90 E91 325D 330D N57 Injection System Kit – Lines, Pump, Rail is a complete, used set of components from the injector nozzles category, designed for BMW 3 Series E90/E91 325d and 330d diesel engines with the N57 unit. This solution is for users who want to restore the proper functioning of the diesel fuel system in a consistent and technically sound manner.

Specifications and technical data

• SKU: 7805428-11
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805428
• Substitutable numbers: 13537805423, 7805423, 13537800124, 7800124, 13537805428, 7805428, 13518577654 7800123, 8577654, 13517800593, 7800593, 13537799992 13537799994 13537799995, 7799992 7799994 7799995, 0445010617, 0 445 010 617
• Fuel type: Diesel
• Category: Fuel Injectors

Kit Purpose and Characteristics

The presented BMW injection system kit for N57 engine includes key fuel line components: lines, pump, and fuel rail. It has been designed to work with diesel engines where precise fuel injection directly impacts performance, running smoothness, and fuel consumption.

A comprehensive approach to replacing injection system components helps reduce the risk of leaks, pressure drops, or parameter discrepancies between individual sub-assemblies. This makes it easier to achieve stable engine operation and proper cold and hot start characteristics.

Benefits of Using a Complete Injection System

Replacing the entire kit, rather than individual parts, offers a number of practical advantages:

• Component Consistency – The injection system components come from a single kit, which helps maintain proper fuel pressure and flow parameters.
• Reduced Diagnostic Issues – A complete replacement minimizes potential sources of faults, simplifying subsequent engine diagnostics.
• Stable Diesel Engine Operation – A properly functioning injection system supports smooth engine operation, better throttle response, and predictable behavior under load.
• Improved Fuel System Smoothness – Appropriately selected lines, pump, and rail help reduce pressure fluctuations and undesirable vibrations in the fuel line.

Injection System in Diesel Engines – Technical Aspects

In a Diesel engine, maintaining proper rail pressure and line integrity is crucial, as it determines injection accuracy and combustion efficiency. The injection system kit for BMW E90/E91 325d and 330d with the N57 engine has been configured to work with the factory control electronics and engine operating characteristics.

During installation, pay attention to:

• correct routing of lines – avoid stress and kinks that could affect fuel flow,
• thorough system bleeding – after installation, to ensure uniform pressure throughout the system,
• leak check after startup – inspect connections for leaks and stable operating parameters.

Condition, Origin, and Fitment

The offered BMW injection system kit is a used part, originating from the brand's original production line. This ensures that factory mounting points and line geometry are preserved, facilitating installation in the engine bay without modifications. This is particularly important for modern diesel engines where assembly tolerances are very strict.

The presence of dedicated part numbers and interchangeable numbers allows for precise matching of the kit to a specific vehicle configuration. Before purchasing, it is advisable to compare the designations in the technical specifications with the vehicle's documentation or information from the service system to confirm full compatibility with your specific BMW 3 Series model.

Technical Support and Additional Materials

When planning to replace injection system components, it is worth familiarizing yourself with typical signs of wear and failure. The guide: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails may be helpful, as it describes symptoms of incorrect injector operation, possible engine consequences, and basic diagnostic methods.

If you are looking for other BMW injector nozzles for different models and engine versions, check out our category: BMW injector nozzles, where you will find a wide selection of fuel system components for this brand's vehicles.