Mercedes-Benz ML W164 Diesel Fuel Tank Filler Neck Pipe Hose Part A1644703920

Mercedes-Benz ML W164 Diesel Fuel Tank Filler Neck Pipe Hose is an original fuel system component designed for diesel engine models. It ensures tight and secure fuel delivery from the filler to the tank, which is crucial for stable fuel system operation and daily driving comfort. Using this OEM component is a sensible choice for repairs when you prioritize factory fitment and predictable installation.

Specifications and technical data

• SKU: A1644703920-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644703920
• Substitutable numbers: A1644703920, A 164 470 39 20, BG
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described fuel filler neck pipe is part of the Fuel Tanks and Filler Necks category, responsible for safely filling the tank with diesel fuel. The design, tailored for Diesel-powered vehicles, minimizes the risk of leaks, air locks, and fuel tank venting issues. A properly selected filler neck pipe also reduces the possibility of contaminants entering the tank, which translates into the longevity of injectors and pumps.

Compatibility and fitment for Mercedes-Benz ML W164

The component was designed specifically for the Mercedes-Benz ML W164 generation SUV, ensuring it maintains factory mounting geometry and hose routing relative to the chassis and fuel tank. This means:

• easier installation without the need for modifications,
• correct hose routing in the undercarriage space,
• compatibility with factory brackets and covers.

The original origin of the part helps maintain the fuel flow parameters designed by the manufacturer and resistance to operating conditions typical for a heavier SUV-class vehicle.

Characteristics of the used component

As a used part, the fuel filler neck pipe has already been in service in a vehicle, which allows for verification of its performance in real-world road conditions. This type of component is particularly attractive for post-accident repairs or when replacing corroded parts, where the priority is to maintain the original construction at a reasonable cost. A used OEM element usually fits into the existing system better than aftermarket replacements with universal geometry.

The importance of a proper filler neck in a diesel engine

In diesel-powered cars, the proper condition of the fuel filler neck pipe has a direct impact on:

• fuel system tightness during refueling,
• reduction of fuel evaporation and unpleasant odors around the vehicle,
• protection against water and dirt entering the tank,
• stable fuel system operation in the long term.

For a diesel engine, where precise injectors and pumps are sensitive to contaminants, a functional filler pipe is an important element of preventive maintenance.

Technical support and selection by part numbers

Selecting a fuel filler neck pipe for a specific Mercedes-Benz ML W164 version should be based on catalog numbers and vehicle data to avoid installation issues. In case of doubt, manufacturer catalogs and comparing the shape and mounting points with the removed part are helpful. Additionally, to better understand the role of this component in the entire fuel system, it is worth consulting specialized technical materials – a practical supplement may be the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses the diagnostics and operation of fuel system components.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other parts from the same group, such as filler hoses, connectors, or connection elements at the tank, check the available parts in the Mercedes Fuel Tanks and Filler Necks category.