Mercedes W204 W212 W221 Diesel OM651 Injector A6510700587 is an original injector nozzle designed for OM651 diesel engines in Mercedes C-Class, E-Class, and S-Class models. This part comes from a dismantled vehicle, allowing for an economical yet technically sound repair of the diesel engine's fuel system.
Specifications and technical data
- SKU: A6510700587
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6510700587
- Substitutable numbers: A6510700587, A 651 070 05 87
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Technical Characteristics
The presented injector belongs to the category of injector nozzles and is dedicated to Diesel engines used in Mercedes W204, W212, and W221 series with the OM651 engine. Using the correct injector in this engine is crucial for stable idle operation, proper cold starts, and maintaining optimal combustion parameters.
The injection system in a diesel engine operates under very high pressure, so selecting the right nozzle is essential for precise fuel delivery and uniform atomization in the combustion chamber. Appropriate injection characteristics translate to smoother engine operation, reduced smoke, and maintained factory performance.
Benefits of Using an Original Injector Nozzle
Using an original injector in the OM651 engine allows you to maintain the parameters specified by the vehicle manufacturer. The most important advantages include:
- Correct Spray Pattern – matched to the combustion chamber and piston geometry of the OM651 engine.
- Stable Fuel Delivery – supports even operation of all cylinders and reduces vibrations.
- Improved Emission Control – proper injection facilitates the efficiency of the diesel particulate filter and exhaust aftertreatment system.
- Protection of Associated Components – correct injection reduces thermal and mechanical stress on pistons, valves, and the turbocharger.
By maintaining factory injection parameters, you can reduce the risk of common issues with diesel engines, such as excessive smoke, power loss, or uneven idling.
Component Condition and Application in Service Practice
The offered injector is a used part, making it an attractive cost-effective alternative compared to new components. This type of part is often chosen for:
- Single-cylinder repairs, when only one injector has been damaged,
- Comparative diagnostics, when a workshop needs a functional reference part,
- Optimizing operating costs in older Mercedes diesel models.
Before installation, the standard workshop procedure is recommended, including verifying the injector's operating parameters on a test bench and appropriate coding in the engine control unit, in accordance with procedures for diesel injection systems.
Importance of Functional Injectors in a Diesel Engine
In OM651 diesel engines, the condition of the injectors directly affects fuel consumption, engine dynamics, and durability. Faulty nozzles can lead to excessive load on the crankshaft-piston assembly, accelerated engine oil consumption, and problems with the exhaust aftertreatment system.
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. This provides practical knowledge for planning injection system repairs.
Selection and Other Mercedes Injector Nozzles
When selecting an injector for a specific vehicle, it is crucial to match it to the engine type, model generation, and the installed fuel system. If in doubt, it is advisable to compare parameters with the currently installed part or consult a mechanic specializing in diesel engines.
If you are also looking for other Mercedes injector nozzles for various models of this brand, check out our dedicated category: Mercedes injector nozzles. This will allow you to easily compare available variants and select the appropriate part for your diesel engine.
