Mercedes W164 W211 Fuel Injection Rail Mount Bracket Holder OM629 A6290720040

The Mercedes W164 W211 Injector Rail Mounting Bracket OM629 is an original fuel system component designed for the stable mounting of the injector rail in a diesel engine. The precise geometry of the bracket ensures correct support for the rail, promoting even injector operation and reducing unwanted vibrations.

Specifications and technical data

• SKU: A6290720040
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290720040
• Substitutable numbers: A6290720040, A 629 072 00 40
• Category: Fuel Injectors

Bracket Purpose and Function

The injector rail mounting bracket in the OM629 engine is responsible for stably holding the injector rail in relation to the cylinder head and engine block. A correctly chosen mounting element:

• minimizes stress on the injector fuel lines,
• reduces vibrations transmitted to the injector rail during engine operation,
• supports system sealing by maintaining the correct position of the rail relative to the injectors,
• facilitates servicing – ensuring repeatable rail positioning during disassembly and reassembly.

In premium vehicles such as the Mercedes W164 and W211, correct injector rail mounting directly impacts engine running smoothness, fuel delivery precision, and the durability of the entire system.

Construction and Compatibility with the Injection System

The original bracket from the injector nozzles category is designed for the specific architecture of the OM629 engine. This means that:

• the mounting geometry matches the factory bolt points on the engine,
• the support surface layout corresponds to the shape of the injector rail used in this engine,
• the element's rigidity is calibrated to handle dynamic loads without excessive deflection.

This precise fit allows for the preservation of the injection system's original operating parameters, which is particularly important in high-power diesel engines with high injection pressures.

Characteristics of a Used Part

The offered bracket is a used OEM part, sourced from disassembly. In practice, this means:

• retention of the original vehicle manufacturer's specification,
• factory-level fit to the injector rail and engine mounting points,
• a favorable cost-to-quality ratio compared to new aftermarket replacements.

A used OEM part is a good choice when only the mounting bracket has been damaged, and other components of the injection system remain functional and do not require replacement.

Application in Injection System Diagnostics and Repairs

A damaged or deformed injector rail bracket can lead to:

• incorrect positioning of the rail relative to the injectors,
• excessive vibrations of fuel system components,
• accelerated wear of high-pressure connections.

When diagnosing injector performance issues, it is worth paying attention not only to the nozzles themselves but also to the condition of the rail mounting. You can read more about the symptoms and consequences of fuel system problems in the article: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails.

Benefits of Choosing an Original Mercedes Bracket

By using the factory injector rail mounting bracket in the OM629 engine, you gain:

• certainty of compatibility with the Mercedes injection system,
• stable rail mounting even under high engine loads,
• reduced risk of leaks resulting from incorrect component positioning,
• easier installation due to the preservation of original mounting points and methods.

If you are looking for other parts in the Mercedes injector nozzles category, check out the Mercedes injector nozzles available in our store to find a complete solution for your fuel system.