Mercedes-Benz M-Class ML W164 OM642 Fuel Injector Injection Nozzle A6420701387

Mercedes-Benz M-Class ML W164 OM642 Fuel Injector Injection Nozzle is a factory-made component of the diesel engine fuel system, designed for the OM642 unit in the Mercedes M-Class W164 model. The offered injector from the Fuel Injector Nozzles category ensures precise fuel dosing, stable engine operation, and correct combustion parameters in the diesel engine. This is a solution for users looking for a technically matched component for professional fuel system repair.

Specifications and technical data

• SKU: A6420701387
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420701387
• Substitutable numbers: A6420701387, A 642 070 13 87, EM
• Category: Fuel Injectors

Purpose and function of the OM642 injector

The injector in the OM642 engine is responsible for accurate fuel atomization in the combustion chamber, which directly affects engine refinement, performance, and diesel fuel consumption. A correctly selected component helps maintain:

• stable idle speed,
• proper dynamics during acceleration,
• reduced exhaust emissions and smoke,
• efficient engine starting in both cold and warm conditions.

Using an injector dedicated to the Mercedes M-Class W164 with the OM642 unit minimizes the risk of compatibility issues and facilitates the diagnostics of the entire fuel injection system.

Benefits of using an original Mercedes fuel injector nozzle

Selecting a component from the Fuel Injector Nozzles group intended for a specific model and engine brings measurable operational benefits. In the case of the Mercedes M-Class W164 with the OM642 unit, you can count on:

• appropriate fuel atomization parameters, consistent with the engine manufacturer's specifications,
• better cooperation with the factory engine control unit and sensors,
• maintaining the correct pressure in the common rail,
• reducing the risk of uneven operation, jerking, or power loss.

For workshops and individual users, this means a more predictable repair process and easier maintenance of the OM642 unit in good technical condition.

Product characteristics and condition

The offered injector is a used component, which allows for an economical repair of the fuel injection system while maintaining compliance with Mercedes factory solutions. This type of component is particularly attractive in situations where:

• it is necessary to replace a single injector after diagnostics,
• the repair is to be carried out on a reasonable budget,
• maintaining the original design of the fuel supply system is important.

The injector is intended for installation in the OM642 engine used in the Mercedes M-Class W164, which makes it easier to select parts based on the engine designation and vehicle model.

Professional diagnostics and operation

Before installing the injector in the Mercedes M-Class W164, it is recommended to perform full fuel injection system diagnostics, including measuring dose corrections, checking rail pressure, and assessing the condition of other components. A properly conducted procedure allows you to:

• identify the actual cause of engine performance problems,
• avoid unnecessary replacement of functional components,
• plan potential regeneration or replacement of the remaining injectors.

To better understand the symptoms of wear and the consequences of neglect in a diesel injection system, it is worth reading the article Diesel injector faults – how to recognize them and what are the risks of neglecting them, which discusses typical symptoms and diagnostic methods.

Expansion of the injection system in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional injectors, spray nozzles, or components related to fuel supply, check the available parts in the Mercedes Fuel Injector Nozzles category.

Summary

Mercedes-Benz M-Class ML W164 OM642 Fuel Injector Injection Nozzle is a solution dedicated to the OM642 engine, allowing for a technically correct repair of the fuel system in the popular M-Class SUV. Choosing an original fuel injector nozzle matched to a specific Mercedes model helps maintain the proper operating parameters of the engine, reduces the risk of starting and smoke issues, and facilitates further service diagnostics.