BMW E60 E61 E65 X5 E70 X3 E83 E92 E93 Fuel Injector Nozzle Diesel M57N2 7792721

BMW E60 E61 E65 X5 E70 X3 E83 E92 E93 Fuel Injector M57N2 is an original component of the BMW diesel engine fuel system, designed for M57N2 units. The used injector nozzle ensures a factory fit for selected models of the 5, 6, 7, X3, X5, and 3 Series, facilitating servicing and restoring proper common rail system operation.

Specifications and technical data

• SKU: 7792721-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7792721
• Substitutable numbers: 13537792721, 7792721, 0445115048, 0 445 115 048, 0986435359, 0 986 435 359
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Compatibility

The M57N2 fuel injector is designed for diesel engines used in BMW E60, E61, E65, X5 E70, X3 E83, E92, and E93 models. Using a factory injector nozzle allows for maintaining engine operating parameters in line with the manufacturer's specifications, which is important for both performance and engine smoothness.

This component belongs to the injector nozzles group, making it directly related to precise fuel metering in the common rail system. Correctly selecting the injector for a specific M57N2 engine variant reduces the risk of starting problems, power loss, or rough idling.

Technical Characteristics and Function in Diesel Systems

The injector operates within a Diesel common rail fuel system, where key factors include: high metering precision, appropriate fuel spray pattern, and stable operation under varying loads. A correctly selected injector nozzle influences:

• maintaining proper common rail pressure within the range specified for the M57N2 engine,
• accurate fuel atomization in the combustion chamber, promoting uniform mixture ignition,
• reducing smoke and power loss resulting from incorrect injection,
• stable idling and smooth acceleration across the entire RPM range.

As an original BMW part, the injector is structurally matched to the parameters of the factory ECU control, which facilitates adaptation and diagnostics during servicing.

Condition, Origin, and Benefits of Choosing a Used Injector

The offered injector nozzle comes from the group of used BMW parts. This type of component is a good solution when a single injector needs replacement and the priority is an optimal cost-to-effect ratio for the repair. Choosing an original, used part allows for maintaining compliance with factory specifications without resorting to cheaper aftermarket alternatives with uncertain parameters.

Before installation, the standard workshop procedure is recommended: leak testing, checking characteristics on a test bench, and, if necessary, coding the injector in the engine control unit according to BMW procedures. This approach increases the chances of stable and repeatable injector system operation after repair.

Why Choose BMW Injector Nozzles

Using original injector nozzles in M57N2 engines translates into a number of practical benefits:

• factory fit for the engine unit – no need for fuel system modifications,
• compatibility with ECU software – injection parameters consistent with the control unit maps,
• easier diagnostics – predictable behavior in computer tests and on the test bench,
• maintaining engine smoothness close to factory levels, while preserving appropriate dynamics and fuel economy.

If you need other parts from the same group, check the available BMW injector nozzles to select a complete service solution for your model.

Diagnostics and Preventive Maintenance of the Injection System

When replacing an injector in a diesel engine, it is worth paying attention to symptoms such as starting difficulties, increased fuel consumption, smoking, or knocking under load. A detailed discussion of symptoms and potential consequences of neglect can be found in the guide Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails, which helps in planning diagnostics and repair of the entire fuel system.