BMW G20 G21 Adblue Filler Neck Cap Pipe Hose Additive Line 7454341

BMW G20 G21 Adblue Filler Neck Cap Pipe Hose Additive Line is an original component of the AdBlue refilling system, designed for the 3 Series G20 and G21 generations. Thanks to its factory geometry and precise body fitment, it ensures reliable fluid routing from the filler neck to the tank, reducing the risk of leaks and operational issues. This is a practical solution for users looking to restore the proper functioning of the exhaust emission reduction system in their BMW.

Specifications and technical data

• SKU: 7454341
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7454341
• Substitutable numbers: 7454341, 16197454341
• Category: Hoses, Lines & Pipes

Purpose and function in the AdBlue system

The presented hose with a filler cap is responsible for safely delivering AdBlue fluid to the tank in BMW 3 Series G20/G21 vehicles. Properly routed within the vehicle's structure, it minimizes the risk of leaks and improper venting during fluid refilling. The integrated filler cap allows for convenient and controlled fluid replenishment, which translates into stable operation of the exhaust gas treatment system.

A properly selected filler hose is essential for maintaining the integrity of the entire AdBlue circuit, and thus for the correct operation of the nitrogen oxide reduction system. Using a genuine BMW component allows for maintaining factory flow parameters and compatibility with mounts and covers in the vehicle's body cavity.

Construction and fitment for the BMW 3 Series G20/G21

The filler hose with cap has been designed specifically for the architecture of G20 and G21 models, taking into account the wheel arch, sill, and luggage compartment layout. The shape of the hose and the placement of mounting points allow for installation in original brackets without the need for modifications or additional adapters.

The component belongs to the Lines, hoses, and pipes group, meaning it is part of a larger fluid transport system in the vehicle. The material used is resistant to AdBlue and typical operating conditions in a car, such as temperature changes and contact with moisture or road debris.

Characteristics of the used component

The offered hose with cap comes from dismantling, which allows for an economical repair of the AdBlue system while maintaining original BMW specifications. The used component is a good choice in situations where there has been mechanical damage to the hose, cracked connectors, or wear of mounting elements.

Using an original, used hose allows for consistency with other installation elements, such as brackets, clamps, or covers, and reduces the risk of fitment issues typical of aftermarket parts with universal geometry.

Benefits of using an original AdBlue filler hose

• Factory fitment to the BMW G20/G21 body, with no modifications required.
• Compatibility with existing brackets and installation routing in the car.
• Reduced risk of leaks and problems with AdBlue fluid refilling.
• Ability to restore proper operation of the exhaust emission reduction system after hose damage.
• Economical solution through the use of an original used component.

Related components and additional technical information

When working on the AdBlue system, it is worth paying attention to the condition of other hoses, connectors, and mounts to avoid having to interfere with the installation again in the near future. It is also good practice to check for leaks after installation and verify the system's operation on the dashboard.

If you are planning a comprehensive repair or upgrade of the AdBlue fluid supply area in your BMW and need other components from the same group, such as additional lines, flexible hoses, or rigid pipes, check the available parts in the BMW lines, hoses, and pipes category.

For users interested in the broader context of how exhaust emission reduction systems work in modern internal combustion engines, an article describing the role of exhaust gas recirculation valves may be helpful – more information can be found in the material EGR: what it is and why it is worth considering used EGR valves.