Fuel Injector BMW E46 X5 E53 E60 E61 E65 Diesel M57N 330d 7789661

BMW E46 X5 E53 E60 E61 E65 Diesel Fuel Injector M57N 330D is an original injector nozzle designed for BMW M57N diesel engines. This component ensures precise diesel fuel dosing, which translates to stable engine operation and proper functioning of the injection system.

Specifications and technical data

• SKU: 7789661
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7789661
• Substitutable numbers: 13537789661, 7789661
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Compatibility with M57N Engine

The presented diesel engine fuel injector has been designed for M57N units used in, among others, BMW 3 Series E46, X5 E53, 5 Series E60/E61, and 7 Series E65 models. The injector nozzle's construction is adapted to the operating characteristics of these engines, allowing for the maintenance of correct injection pressure, proper fuel spray pattern, and even fuel supply to all cylinders.

Thanks to the use of an original BMW solution, the injection system maintains factory operating parameters, and the engine retains its proper dynamics, flexibility, and predictable response to the accelerator pedal.

Construction and Operating Characteristics of the Injector Nozzle

The BMW injector nozzle is responsible for precise diesel fuel atomization in the combustion chamber. The appropriately selected geometry of the tip and flow channels enables:

• accurate fuel dosing across the full engine load range,
• stable atomization at high common rail operating pressure,
• even mixture combustion, which contributes to maintaining the engine's smooth operation,
• maintaining the efficiency of the injection system under typical diesel engine operating conditions.

A properly functioning injector nozzle reduces the risk of excessive smoke, power loss, or uneven idling, which is important for both driving comfort and the durability of other engine components.

Benefits of Using an Original BMW Injector Nozzle

Choosing an original BMW diesel injector nozzle ensures the integrity of the entire fuel supply system. Compared to aftermarket alternatives, an OEM part is designed for specific injection maps and engine control unit parameters, which translates to:

• better compatibility with factory ECU software,
• repeatable injection parameters between individual cylinders,
• reduced risk of starting problems with both cold and warm engines,
• more predictable fuel consumption in daily operation.

This solution is particularly recommended for servicing M57N units, where fuel dosing precision is crucial for the durability of the turbocharger, diesel particulate filter (if present), and the overall condition of the diesel engine.

Item Condition and Service Application

The offered injector is from the group of used BMW injector nozzles, making it an attractive solution for budget-friendly fuel system repairs. Such components are often chosen for:

• replacing a single injector after a diagnosed fault,
• staged repairs, where the entire system's efficiency is gradually restored,
• servicing M57N engines in vehicles used intensively, e.g., for long-distance driving.

Selecting the correct injector nozzle for a specific diesel engine version helps reduce the risk of improper installation and issues with injection adaptation during subsequent diagnostics.

Injection System Diagnostics and Prevention

To fully utilize the potential of the offered injector, it is advisable to combine its installation with thorough diagnostics of the entire fuel supply system. Symptoms such as uneven idling, power loss, or increased fuel consumption may indicate the need to check several components simultaneously. Practical tips for recognizing injection problems can be found in the article Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails, which discusses typical symptoms, consequences of neglect, and basic diagnostic methods.

Other BMW Injector Nozzles

If you are looking for other BMW injector nozzles compatible with different models or engine versions, check out our dedicated category BMW Injector Nozzles, where you will find a wide selection of fuel system components for this brand.