Mercedes W164 W204 W211 OM642 Injector A6420700487 is an original injector nozzle designed for OM642 diesel engines, used in popular Mercedes M-Class, C-Class, and E-Class models. This component ensures precise diesel fuel dosing, which translates to stable engine operation and correct combustion characteristics.
Specifications and technical data
- SKU: A6420700487
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6420700487
- Substitutable numbers: A6420700487, A 642 070 04 87
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Role in the Injection System
The presented OM642 diesel engine injector nozzle is responsible for accurate fuel atomization in the combustion chamber, maintaining the correct injection pressure and timing. In Mercedes diesel engines, a properly functioning injector is crucial for:
- maintaining smooth engine operation across the entire RPM range,
- reducing smoke and noise characteristic of diesel engines,
- stable combustion parameters, contributing to lower fuel consumption,
- protecting cooperating components such as pistons, valves, and the DPF filter.
Benefits of Using an Original Injector Nozzle
In Mercedes common rail systems, using the correct injector directly impacts the durability and refinement of the engine. Installing this injector nozzle allows for:
- factory fit for the OM642 engine in terms of injection characteristics,
- proper interaction with the ECU control electronics and injection maps,
- improved idle stability and reduced jerking during acceleration,
- more predictable throttle response under typical driving conditions.
As a component from the Injector Nozzles category, this product is intended for users who expect to maintain parameters close to factory specifications, without the need for aftermarket replacements with uncertain characteristics.
Operating Characteristics in a Diesel Engine
The injector is designed to work with a Diesel fuel supply system, where maintaining high pressure and precise opening times is essential. A correctly selected injector nozzle:
- ensures proper fuel atomization in the combustion chamber,
- reduces the risk of uneven combustion, which can lead to vibrations and power loss,
- supports the maintenance of correct exhaust emission parameters, which is important for periodic technical inspections.
By maintaining compatibility with the OM642 diesel system, the injector helps maintain stable common rail pressure and proper operation of all cylinders.
Practical Operational Tips and Diagnostics
When replacing the injector nozzle in an OM642 engine, it is advisable to check the condition of other fuel system components, such as lines, the high-pressure pump, and the fuel filter. Poor fuel quality or contamination can accelerate injector wear, leading to:
- cold start difficulties,
- uneven idling,
- increased fuel consumption and reduced acceleration,
- smoke generation under load.
If you want to better understand the symptoms of injector wear and the consequences of neglecting them, it is worth reading the article Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which discusses typical symptoms, diagnostic methods, and service recommendations.
Expansion of Mercedes Injector Nozzle Offer
For users looking for other Mercedes injector nozzles for various models and engine configurations, a dedicated category has been prepared. Check the available Mercedes injector nozzles to select the appropriate component for your specific vehicle version and fuel system.
Summary
Mercedes W164 W204 W211 OM642 Injector A6420700487 is a solution for drivers and workshops who want to maintain proper diesel engine operating parameters in Mercedes vehicles. A correctly selected injector nozzle supports even combustion, stable engine operation, and proper interaction with the control electronics, which in the long run translates to more predictable vehicle operation.
