Mercedes W176 W204 W212 W246 OM651 Fuel Injector is an original component of the fuel system for diesel engines, designed for OM651 units in popular Mercedes A-Class, C-Class, E-Class, and B-Class models. The precisely selected injector nozzle ensures stable diesel fuel dosing, which translates to smooth engine operation and predictable performance.
Specifications and technical data
- SKU: A6510702987
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6510702987
- Substitutable numbers: A6510702987, A 651 070 29 87
- Fuel type: Diesel
- Category: Fuel Injectors
Application in OM651 Engine and Compatibility
The presented diesel engine fuel injector is compatible with OM651 units used in Mercedes W176, W204, W212, and W246 models. The injector nozzle design is adapted to the operating characteristics of modern diesel engines, allowing for the maintenance of appropriate fuel pressure and spray pattern in the combustion chamber.
Selecting the correct injection element is crucial for:
- stable idle operation and reducing engine vibrations,
- maintaining proper diesel engine running smoothness across the entire RPM range,
- efficient mixture combustion, which helps maintain factory power and torque parameters.
Injector Nozzle Operating Characteristics
This component belongs to the category of Injector Nozzles, responsible for precise diesel fuel atomization in the combustion chamber. In modern common rail systems, a properly functioning injector directly influences:
- accurate fuel dosing in multiple injection phases (pre-injection, main injection, potential post-injection),
- reduced exhaust smoke and maintaining the efficiency of the exhaust gas aftertreatment system,
- decreased engine mechanical loads due to uniform cylinder pressure progression.
A correctly selected injector nozzle also helps reduce the risk of premature wear of components such as pistons, valves, or the particulate filter, as the combustion process occurs under more controlled conditions.
Condition, Origin, and Benefits of Choosing a Used Part
The offered injector is an original Mercedes part from the used OE parts segment. In practice, this means maintaining the factory spray pattern geometry and compliance with parameters specified by the vehicle manufacturer. Compared to low-budget aftermarket alternatives, an original injector nozzle provides better compatibility with the specific engine unit.
Choosing a used OE injector is particularly beneficial when you prioritize:
- maintaining the original engine operating characteristics without experimenting with unreliable aftermarket parts,
- optimizing repair costs while retaining a component from the same design line as the factory assembly,
- maintaining compatibility with the engine control unit software, which has been calibrated for a specific injector type.
Fuel Injection System Operation, Diagnostics, and Prevention
The diesel engine fuel injection system is particularly sensitive to fuel quality and regular servicing. Symptoms such as starting difficulties, uneven cold running, power loss, or increased smoke may indicate wear of one or more injectors. To better understand the symptoms and consequences of neglect, it is worth familiarizing yourself with the advisory material: diesel injector faults – symptoms, consequences, and diagnostics.
When replacing a single injector nozzle, it is recommended to:
- thoroughly clean the cylinder head seat before installation,
- use new seals in accordance with the manufacturer's recommendations,
- check the injector's operating parameters after installation using an appropriate diagnostic tester.
Other Mercedes Injector Nozzles
If you are looking for other Mercedes injector nozzles for different cylinders or engine variants, check the Mercedes injector nozzles available in our assortment to select a set compatible with your model.
