Mercedes ML W164 Fuel Injector Injection Nozzle OM642 Diesel A6420701387

Description

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes ML W164 Fuel Injector Injection Nozzle OM642 Diesel is an original fuel system component designed for diesel engines, ensuring precise fuel dosing and stable engine operation. As part of the Injector Nozzles group, it is a key component responsible for the proper atomization of diesel fuel in the combustion chamber. This used injector is a solution that allows for the technical repair of the injection system while maintaining a favorable cost-to-quality ratio.

Specifications and technical data

• SKU: A6420701387-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420701387
• Substitutable numbers: A6420701387, A 642 070 13 87
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and role in the injection system

The presented fuel injector has been designed to work with the OM642 engine powered by Diesel fuel. Its task is to precisely dose the fuel under high pressure and ensure proper atomization in the combustion chamber, which translates into engine refinement, performance, and exhaust emission levels.

A properly selected and functional injector helps reduce smoke, uneven engine operation, and power loss. In the case of modern engines, such as the OM642, the injection operating parameters are strictly controlled by the ECU, which is why using a component with the correct characteristics is particularly important.

Benefits of using an original injector

Choosing an original injector for a Mercedes with a diesel engine brings a number of technical benefits:

• maintaining factory fuel dosing parameters and engine operating characteristics,
• better compatibility with control electronics compared to generic replacements,
• reducing the risk of starting problems, jerking, or engine stalling,
• the ability to restore the proper operation of the injection system after previous faults.

Thanks to this, the injector can be used both for routine repairs and for more extensive service work on the fuel system in Mercedes vehicles.

Product characteristics and condition

The offered item comes from the Injector Nozzles group and is intended for a diesel engine. The product is in used condition, which means it has been previously operated but is suitable for further use after proper verification and installation. This type of part is particularly attractive in situations where it is necessary to replace several injectors at once and cost optimization of the repair is a priority.

Before installation, it is recommended to perform professional diagnostics of the injection system and check the injection operating parameters on a test bench. This allows you to confirm the correct operation of the component in a specific vehicle and avoid secondary faults.

Selection, diagnostics, and operational safety

When selecting an injector for a Mercedes ML W164 with an OM642 engine, it is crucial to match it to the specific version of the engine and the fuel system configuration. It is worth paying attention to compliance with the manufacturer’s markings and service recommendations, as well as the vehicle’s service history (e.g., previous fuel system repairs).

Symptoms such as difficulty starting when the engine is hot or cold, increased fuel consumption, smoke, or characteristic knocking around the cylinder head may indicate problems with the injectors. A detailed discussion of symptoms and diagnostic methods can be found in the article Diesel injector faults – how to recognize them and the risks of neglecting them, which helps to better understand the impact of injector condition on engine operation.

Expanding 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, nozzles, or components related to fuel atomization, check the available parts in the Mercedes Injector Nozzles category.

Such an approach allows for consistent servicing of the entire injection system, which translates into more stable engine operation, a lower risk of subsequent failures, and more predictable long-term operating costs.