BMW 1 2 Series F20 F21 F22 LCI Diesel AdBlue Tank SCR Reservoir Active 7403541

The BMW F20 F21 F22 LCI Diesel AdBlue Tank is an original component of the AdBlue dosing system, designed for BMW models with diesel engines. Thanks to its factory design, it ensures proper supply to the exhaust gas reduction system, stable operation of the SCR system, and compliance with emission standards. This is a solution for users who want to maintain consistency with factory specifications and avoid issues with diagnostics or calibration.

Specifications and technical data

• SKU: 7403541-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7403541
• Substitutable numbers: 16197403541, 7403541, EM
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and Role in the AdBlue System

The presented tank is a component of the exhaust gas purification system in BMW cars with Diesel engines, equipped with a selective catalytic reduction system. It is responsible for storing the AdBlue solution and its stable supply to other system elements, which translates to:

• maintaining correct pressure and flow of the fluid in the system,
• proper operation of the nitrogen oxide reduction system,
• reducing the risk of control unit errors related to AdBlue level or availability.

Thanks to its adaptation to the LCI generation of the F20, F21, and F22 series, the tank works with the exhaust and engine control system architecture characteristic of these models.

Compatibility with BMW F20 F21 F22 LCI Models

The tank has been specifically designed for the compact BMW 1 and 2 Series models after facelift (LCI) with diesel engines. This means its geometry, mounting points, and connections are adapted to the factory design solutions of these body types. In practice, this facilitates installation and reduces the need for system modifications.

It is always advisable to confirm part selection based on the OEM number or vehicle VIN, which minimizes the risk of incompatibility and speeds up the service process.

Construction, Installation, and Operation

As a component in the Fuel Tanks and Filler Necks category, this AdBlue tank is designed to operate in demanding underbody conditions – exposure to temperature changes, moisture, and road debris. The design includes appropriate connection ports and mounting points, allowing for:

• maintaining the factory routing of lines and harnesses,
• proper routing of the filler and vent pipes,
• easier disassembly and reassembly during service work.

The used condition means the part comes from disassembly, which is an attractive cost alternative to new components, while maintaining the original manufacturer's specifications.

Benefits of Using an Original AdBlue Tank

Using an original AdBlue tank in BMW F20, F21, and F22 LCI models offers a range of practical benefits:

• Factory Fitment – compatibility with mounting systems, electrical installations, and fluid lines.
• Stable SCR System Operation – proper AdBlue supply reduces the risk of limp mode and error messages.
• Diagnostic Support – the tank's operating parameters are recognized by the factory BMW service software.
• Economical Repair – a used part allows for reduced costs in restoring the exhaust gas purification system's functionality.

Selection and Technical Knowledge – Expert Support

To properly plan the repair or replacement of components related to fuel and additive storage and delivery, it is worth expanding your knowledge about the entire system's construction. A detailed discussion of operating principles, diagnostics, and component selection can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which organizes key technical information.

If you are planning comprehensive fuel system service and want to compare other solutions used in this brand, including different tank and pipe configurations, check the available parts in the BMW Fuel Tanks and Filler Necks category.