BMW 1 Series F20 F21 LCI Diesel AdBlue Tank SCR Reservoir Active 7403541

The BMW F20 F21 LCI AdBlue SCR Tank is an original exhaust gas purification system component designed for BMW diesel vehicles. It ensures proper storage of the AdBlue solution, which is crucial for stable SCR system operation and maintaining low nitrogen oxide emissions. Thanks to its factory design, the tank is precisely fitted to the chassis architecture of the F20/F21 facelift (LCI) models, facilitating installation and subsequent use.

Specifications and technical data

• SKU: 7403541
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7403541
• Substitutable numbers: 16197403541, 7403541, AS
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and Function in the SCR System

The presented AdBlue tank is responsible for the safe storage of the reducing agent in the Selective Catalytic Reduction system. A properly functioning tank:

• ensures system tightness and protection against external contaminants,
• maintains appropriate operating conditions for the AdBlue solution,
• supports stable agent dosing to the SCR catalyst,
• indirectly contributes to the vehicle meeting emission standards.

Due to its specific fit for the BMW F20/F21 LCI generation, this component works seamlessly with the factory electrical and fuel systems, minimizing the risk of operational issues after replacement.

Design Tailored for BMW Diesel Engines

The tank has been specifically designed for BMW vehicles powered by diesel fuel that utilize an SCR system. This ensures compatibility with:

• the chassis geometry and mounting points characteristic of the F20/F21 LCI,
• the routing of exhaust and fuel system lines,
• factory connectors intended for the AdBlue system.

This precise fit translates to predictable installation without the need for structural modifications or system adaptations.

Used Condition – A Conscious Technical Choice

The offered AdBlue tank comes from the used BMW parts segment, allowing for the combination of original construction with an attractive purchase price. For many users, this is a sensible solution for SCR system repairs, especially when only the tank has been damaged and other system components are functioning correctly. Choosing an original, used component reduces the risk of compatibility issues often encountered with universal aftermarket replacements.

Why Choose an Original BMW AdBlue Tank

Replacing the AdBlue tank with a component that matches the factory specification offers a range of technical benefits:

• Factory Fit – maintaining original geometry and mounting points simplifies installation and servicing.
• Compatibility with Diesel Systems – the tank works with the factory agent dosing system in BMW diesel engines.
• Stable SCR System Operation – proper AdBlue storage supports consistent dosing and reduces the risk of control unit errors.
• Cost-Effective Repair – using a used component helps reduce costs while preserving original construction.

Related Components and Technical Knowledge

When working on the fuel and exhaust gas purification systems, it's advisable to check the condition of lines, connections, and the overall state of the fuel system. For deeper insights into diagnostics, selecting parts by OEM numbers, and operational principles, the article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair will be helpful. You will find practical tips on working with fuel supply and storage components, as well as related sub-assemblies.

If you are planning a comprehensive repair or upgrade of the fuel supply and storage area in your BMW and require other parts from the same group, such as additional tanks, filler necks, or mounting elements, check the available parts in the BMW Fuel Tanks and Filler Necks category.

For users considering broader use of aftermarket components for servicing vehicles of this brand, the guide: Used Parts for BMW – Are They Worth It? Key Benefits for Brand Enthusiasts will be a valuable addition. It allows for a conscious assessment of the advantages and limitations of using used parts in BMW vehicles, including systems related to fuel and exhaust gas purification.