Mercedes ML W164 OM642 Injector Nozzle A6420701387 is an original injector nozzle from the Mercedes group, designed for OM642 diesel engines used in the ML W164 model. The component comes from disassembly, allowing for an economical yet technically sound repair of the fuel supply system in your car.
Specifications and technical data
- SKU: A6420701387-1
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6420701387
- Substitutable numbers: A6420701387, A 642 070 13 87
- Category: Fuel Injectors
Technical Characteristics of the Injector Nozzle
The injector nozzle from the Injector Nozzles category is responsible for precise fuel metering into the combustion chamber in the OM642 engine. Original manufacturing ensures the correct fuel spray pattern, appropriate opening pressure, and stable operation across the full load range, which translates to smooth engine operation.
As an OEM part from Mercedes, the injector is designed to work with the factory engine control unit, exhaust gas recirculation system, and exhaust gas purification system, making it easier to maintain compliance with factory operating parameters and emission standards.
Application in the OM642 Engine in Mercedes ML W164
The injector is intended for installation in the OM642 diesel engine used in the Mercedes ML W164 model. Thanks to its factory fit to the cylinder head, combustion chamber, and common rail system, the component enables:
- stable cold and warm engine starts, without excessive vibrations and idle speed fluctuations,
- correct fuel delivery under load, which helps maintain factory-level power and torque,
- predictable vehicle behavior during acceleration and constant speed driving.
The selection of an original injector nozzle is particularly important in V6 diesel engines, where injection precision affects not only performance but also the durability of the engine and its ancillaries.
Condition, Origin, and Benefits of Using Used OEM
The offered injector is a used part, sourced from vehicle disassembly. This type of OEM part is an advantageous alternative to new aftermarket parts because it retains the manufacturer's factory specifications while reducing the cost of the injection system repair.
Choosing an original, used injector nozzle allows for:
- maintaining compatibility with the factory engine control unit software,
- reducing the risk of adaptation and coding issues compared to some aftermarket parts,
- speeding up the repair process due to the possibility of direct installation in place of the worn-out component.
If you want to learn more about how the availability of used OEM parts affects repair time, check out the article: How Used OEM Parts Shorten Car Stays in the Workshop.
Diagnostics and Prevention of the Injection System
A functional injector is crucial for diesel engine operation. Symptoms such as rough idling, smoking, power loss, or increased fuel consumption may indicate worn injector nozzles. For the OM642 engine, regular diagnostics of injection parameters and prompt reaction to the first symptoms can prevent more serious damage.
More information on typical symptoms and consequences of neglecting the injection system can be found in the guide: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails.
Complementary Mercedes Injector Nozzles
If you are planning a comprehensive service of the injection system and need other Mercedes injector nozzles for similar applications, check out our dedicated offer: Mercedes Injector Nozzles. This will allow you to easily assemble a set of components from the same product group, facilitating service and maintaining the technical consistency of the entire system.
