Mercedes-Benz W164 W204 OM642 Diesel Fuel Injection Nozzle Bracket + Bolts Set

The Mercedes W164 W204 OM642 Injector Holder is a specialized component of the diesel engine fuel system, designed for OM642 units used in Mercedes W164 and W204 models. It is responsible for the stable mounting of the injector, which directly impacts fuel injection precision, engine running smoothness, and operational safety.

Specifications and technical data

• SKU: A6420160038-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420160038
• Substitutable numbers: A6420160038, A 642 016 00 38, KZ
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Function of the Injector Holder

The injector holder for the OM642 diesel engine ensures a rigid, repeatable seating of the injector in the cylinder head. Proper tightening of the injector reduces the risk of exhaust gas blow-by, leaks at the seals, and incorrect fuel atomization.

Stable injector mounting is crucial for:

• maintaining correct injection pressure in the combustion chamber,
• reducing engine vibrations and noise,
• minimizing fuel consumption and exhaust emissions,
• protecting the injector seat from mechanical damage.

Benefits of Using an Original Mercedes Holder

The injector holder designed for Mercedes is engineered for the specific parameters of the OM642 engine, thus ensuring:

• precise geometric fit to the cylinder head seat and injector body,
• adequate rigidity and resistance to thermal loads typical for diesel engines,
• compatibility with the factory fuel injection system components in W164 and W204 models.

Such a precise fit reduces the risk of improper installation, which is particularly important in modern diesel engines that are sensitive to any deviations in injector position.

Product Characteristics and Application in Diesel Engines

The presented holder belongs to the category of injector nozzles, which are components directly related to precise fuel delivery. In diesel engines, even minor deformation or play in the mounting can lead to:

• uneven engine idling,
• loss of power and acceleration at medium and high RPMs,
• increased smoke and a characteristic smell of unburnt fuel,
• accelerated wear of injectors and cylinder head seats.

Therefore, selecting the correct holder is one of the key steps in servicing the fuel system in Mercedes vehicles with the OM642 engine.

Condition, Installation, and Service Aspects

The offered injector holder is a used part, which in workshop practice often represents a sensible compromise between repair cost and maintaining the original manufacturer's specifications. Before installation, it is recommended to:

• inspect the contact surfaces with the cylinder head and injector for mechanical damage,
• check the threads and mounting points,
• use appropriate tightening torques according to Mercedes service documentation.

A correctly installed holder helps restore stable fuel system operation after injector regeneration or replacement, without the need for cylinder head modifications.

Technical Support and Additional Materials

If you are diagnosing problems with the fuel system operation in a diesel engine, it is worth familiarizing yourself with practical tips regarding the symptoms and consequences of injector damage. Detailed information can be found in the article: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which discusses typical symptoms, possible causes, and diagnostic methods.

If you are looking for other Mercedes injector nozzles compatible with various models of this brand, check out our dedicated category: Mercedes injector nozzles. This will allow you to easily compare available solutions and select the appropriate part for your specific engine configuration.