Mercedes W639 OM646 Injector Injector A6460701187 is an original injector nozzle from the Mercedes group, designed for OM646 diesel engines used in W639 series models. The part comes from a dismantled vehicle, allowing for an economical yet technically sound repair of your vehicle's fuel supply system.
Specifications and technical data
- SKU: A6460701187
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6460701187
- Substitutable numbers: A6460701187, A 646 070 11 87, A 646 070 14 87, A6460701487
- Category: Fuel Injectors
Application in OM646 Engine and W639 Model
The presented injector is intended for OM646 power units installed in the W639 body. This solution is used in popular Mercedes van and passenger car versions where stable diesel fuel supply to the engine is crucial. Using an original injector nozzle allows for maintaining the unit's factory operating parameters, including running smoothness, dynamics, and correct exhaust emissions.
Thanks to a design compliant with the manufacturer's requirements, the injector ensures precise fuel metering across the entire load range. This is particularly important in vehicles used in mixed driving conditions – urban and extra-urban – where the injection system operates under varying thermal and load conditions.
Technical Characteristics of the Injector Nozzle
The original Mercedes injector nozzle has been designed for high resistance to operating pressure and long-term operation in a diesel fuel environment. Key features of this component include:
- Precise Fuel Atomization – the correct shaping of the fuel spray in the combustion chamber promotes uniform mixture combustion.
- Compatibility with Engine Control Unit Parameters – the injector's operating characteristics are consistent with the injection maps specified for the OM646 unit.
- Stable Operation at High Pressure – the design is adapted to the loads typical of modern common rail systems.
- Original Manufacturing – maintains the geometry and tolerances specified by the vehicle manufacturer.
A component configured in this way helps reduce the risk of starting problems, power loss, or uneven engine operation, which often result from using unverified aftermarket parts.
Benefits of Using an Original Injector Nozzle
Choosing a Mercedes group injector nozzle translates into a range of practical operational benefits:
- Improved Engine Running Stability – uniform fuel delivery reduces vibrations and RPM fluctuations.
- Optimized Fuel Consumption – correct atomization promotes efficient mixture combustion.
- Reduced Risk of Secondary Damage – a functional injector reduces the load on the turbocharger, particulate filter, and exhaust system.
- Compatibility with Factory Equipment – no need for modifications to the fuel or electrical system.
This component is a good choice for both routine repairs and comprehensive regeneration of the injection system in commercial and passenger vehicles based on the W639 platform.
Part Condition, Origin, and Selection
The offered injector is a part from a dismantled vehicle, allowing for a cost-effective restoration of the injection system's functionality while maintaining the original manufacturer's specifications. Before installation, a standard diagnostic procedure and verification of compatibility with the specific OM646 engine version in your Mercedes W639 are recommended.
To select the correct nozzle for your vehicle, it is advisable to compare the markings with the existing part or consult the service documentation. The product has assigned replacement numbers, which facilitates matching it to different engine variants within the same engine family.
Technical Support and Additional Materials
If you want to better understand the symptoms of wear in injection system components and the consequences of neglecting them, the following guide article will be helpful: Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails. You will find practical information there on diagnostics and common injection problems in diesel engines.
If you need other parts from the Mercedes injector nozzles category, check the available products using the link: Mercedes injector nozzles. This will allow you to easily assemble a set of parts matched to your fuel system.
