Mercedes W164 OM642 Fuel Injection Line Pressure Pipe Rail Injector A6420701433

Mercedes W164 OM642 Fuel Injection Line Pressure Pipe Rail Injector is an original diesel fuel supply system component designed for the OM642 series diesel engines. This used line ensures factory-standard fuel routing geometry and maintains compliance with manufacturer requirements, which translates into stable engine performance. It is a practical solution for users who want to maintain the efficiency of the fuel system while keeping maintenance costs reasonable.

Specifications and technical data

• SKU: A6420701433-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420701433
• Substitutable numbers: A6420701433, A 642 070 14 33
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the fuel system

The fuel line for the Mercedes W164 with an OM642 engine is responsible for the safe and leak-free delivery of diesel fuel to the fuel injection system components. A properly selected line minimizes the risk of pressure drops, leaks, and issues with starting or uneven engine operation. Using a component dedicated to this diesel unit allows for maintaining proper fuel flow parameters and operational stability across the full load range.

The element has been designed with the specifics of Diesel engines in mind, where the supply system operates under higher pressure loads than in gasoline units. As a result, the line is adapted to the characteristics of the injection system, which is important for both durability and engine refinement.

Benefits of using an original fuel line

Using an original fuel line in a Mercedes W164 with an OM642 engine provides a number of practical maintenance and operational benefits:

• preservation of the factory routing, which facilitates installation and eliminates stress in the system,
• proper fitment to the connectors and mounts in the engine bay,
• compatibility with the operating parameters of the diesel engine's injection system,
• reduced risk of fuel leaks and associated malfunctions.

For users who value consistency with the factory design of the vehicle, choosing such a component is a reasonable alternative to random replacements of uncertain origin.

Component condition and installation aspects

The fuel line is offered as a used part, which helps reduce repair costs while maintaining the original design specifications. This type of component, sourced from disassembly, is particularly attractive for older Mercedes W164 models, where both functionality and maintenance economy are important. A used fuel line can be a good choice when replacing a mechanically damaged or corroded part.

Due to the nature of the fuel system's operation, installation by a person with experience in servicing diesel engines is recommended. Proper routing of the line, checking for leaks after installation, and verifying engine operation after startup are key steps that affect operational safety and the durability of the entire system.

Connection to the cooling system and operation in high temperatures

Although the fuel line belongs to the Cooling system hoses and pipes group, in practice, it operates in the immediate vicinity of the engine, where both thermal conditions and the stability of the engine's operating temperature are significant. An efficient cooling system limits the overheating of components in the engine bay, which also affects the service life of fuel lines and other components made of plastic and rubber.

To better understand how high temperatures under the hood affect the durability of lines, radiators, and fans, it is worth reading the guide: Summer heat vs. cooling system – how used radiators and fans affect economical operation. Knowledge in this area helps in planning maintenance in a way that reduces the risk of failure during the summer season.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as flexible hose sections, rigid pipes, or connection fittings, check the available parts in the category Mercedes cooling system hoses and pipes.

Summary

Mercedes W164 OM642 Fuel Injection Line Pressure Pipe Rail Injector is a practical choice for users who want to restore the proper operation of the fuel supply system in a diesel engine while maintaining the original design specifications. A used, original component allows for reduced service costs while ensuring a perfect fit for the factory mounting system and engine operating parameters. It is a sensible solution for workshops and vehicle owners who prioritize technically correct yet economical repairs.