BMW G20 G21 Fuel Tank Filler Neck Pipe Line Hose Diesel Tank 7449051

BMW G20 G21 Fuel Tank Filler Neck Pipe Line Hose Diesel Tank is an original fuel system component designed for the precise routing of fuel from the filler neck to the tank. Thanks to its factory geometry and perfect fit for the 3 Series G20/G21 body, it ensures a stable connection, system tightness, and proper tank ventilation, which translates into trouble-free refueling and safe operation. As part of the Fuel Tanks and Filler Necks group, it is a key element of a properly functioning fuel system in modern BMW diesel units.

Specifications and technical data

• SKU: 7449051
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7449051
• Substitutable numbers: 7449051, 16117449051
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described fuel filler neck is designed specifically for BMW 3 Series G20 and G21 models with diesel engines. Its task is the controlled transport of diesel fuel from the filler area to the fuel tank, while maintaining proper flow and resistance to body vibrations. The design, matched to the BMW chassis architecture, minimizes the risk of stress, abrasion, and leaks, which is important for both safety and the durability of the entire system.

Compatibility with diesel engines

The component has been manufactured for use in the fuel system of diesel engines (fuel type: Diesel). The material and cross-sections have been selected to ensure resistance to the chemical properties of diesel fuel and the typical operating conditions of modern BMW units – frequent refueling, temperature changes, vibrations, and loads resulting from city and highway driving. As a result, the fuel filler neck provides a stable link between the filler cap and the tank, supporting the proper operation of fuel system pumps and accessories.

Characteristics of the used component

The offered component is a used part, sourced from vehicle dismantling, which allows for maintaining factory fit and original BMW specifications. Such components are often chosen for accident repairs, replacing a damaged pipe after a collision or corrosion, as well as for sealing the fuel system after bodywork. A used fuel filler neck is a reasonable compromise between repair costs and maintaining the original geometry and quality of workmanship intended by the manufacturer.

Benefits of using an original fuel filler neck

Using an original fuel filler neck in a BMW G20/G21 brings a number of practical benefits:

• maintaining the correct routing of the pipe relative to the body and chassis,
• reducing the risk of fuel leaks in the filler area and at the tank,
• proper cooperation with factory mounting elements and covers,
• stable operating conditions for other fuel system components.

Thanks to this, replacing a damaged element with an original fuel filler neck allows for restoring the integrity and tightness of the fuel system without the need for modifications or fitting aftermarket replacements.

Technical support and additional materials

When selecting fuel system components for a BMW, it is worth using knowledge about the construction of the entire system. Detailed information on diagnostics, selection by OEM numbers, and operation can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses practical aspects of working with modern diesel systems, including issues related to the tank and accessories.

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