Mercedes W204 W212 W906 Fuel Injector Nozzle Diesel OM651 A6510704987

Mercedes W204 W212 W906 Fuel Injector Diesel OM651 A6510704987 is an original fuel system component designed for Mercedes diesel engines from the OM651 family. A precisely selected injector nozzle ensures proper fuel metering, stable engine operation, and correct combustion parameters during daily use. A used OEM component is a sensible choice for professional repair or regeneration of the injection system in Mercedes compact, mid-size, and commercial vehicles.

Specifications and technical data

• SKU: A6510704987-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510704987
• Substitutable numbers: A6510704987, A 651 070 49 87
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The offered injector belongs to the Injector Nozzles category and works with a Diesel engine. Its task is to precisely atomize fuel in the combustion chamber, which affects the smoothness of the unit's operation, acceleration dynamics, and fuel consumption. A correctly selected element of this type limits the risk of uneven idling, power drops, or excessive exhaust smoke.

The injector is designed for Mercedes vehicles equipped with the OM651 engine. By maintaining the original operating characteristics of the injection system, it is possible to preserve parameters close to the manufacturer's original settings, which is important for both performance and the durability of the engine.

Benefits of Using an Original Injector Nozzle

Using an original injector in a diesel engine brings a number of practical operational benefits:

• maintaining proper fuel injection pressure and characteristics,
• stable engine operation across the full RPM range,
• limiting the risk of excessive exhaust smoke,
• better fuel dose repeatability compared to random aftermarket replacements,
• easier diagnostics and service due to compliance with factory parameters.

The injector, as a component of the Diesel fuel system, directly impacts the durability of pistons, valves, and the turbocharger. A correctly selected and functional injector nozzle helps reduce the risk of costly failures resulting from improper combustion of the fuel-air mixture.

Condition, Origin, and Fitment

The offered injector is a used part, sourced from a dismantled Mercedes vehicle. This type of component is particularly attractive when you want to maintain the original specification of the injection system while optimizing repair costs. A used OEM element usually works better with the existing installation than random aftermarket parts with uncertain parameters.

The product has an assigned OEM part number and relevant interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle year. Before purchasing, it is advisable to compare the designations with your vehicle's data or consult with a mechanic to ensure full compatibility with the injection system.

Operation and Diagnostics of Diesel Injection Systems

Diesel engines are particularly sensitive to the condition of injectors. Symptoms such as difficulty starting with a warm or cold engine, uneven idling, power loss, or increased fuel consumption may indicate the need for injector nozzle verification. In many cases, replacing a single injector allows for the restoration of correct engine operating parameters without the need to interfere with other system components.

If you want to better understand the symptoms of wear and diagnostic methods, a guide describing common diesel injector problems will be helpful: diesel injector faults – symptoms, consequences, and diagnostics. Knowledge in this area makes it easier to decide whether replacing a single component is sufficient or if a broader intervention in the fuel system is necessary.

Expanding Injector Repair in Mercedes

If you are planning a comprehensive engine area repair or upgrade for your Mercedes and need other parts from the same group, such as additional injectors, tips, or related fuel system components, check the available parts in the Mercedes Injector Nozzles category.

This allows you to select several compatible components in a single service stage, which simplifies repair logistics and helps maintain the consistency of parameters for the entire injection system in your vehicle.