BMW G20 G21 Adblue Tank Active SCR Additive Reservoir 7454338

BMW G20 G21 Adblue Tank Active SCR Additive Reservoir is an original exhaust emission reduction system component designed for modern 3 Series models. Thanks to its factory-spec BMW design, it ensures proper SCR system operation, stable AdBlue solution dosing, and compliance with stringent emission standards.

Specifications and technical data

• SKU: 7454338
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7454338
• Substitutable numbers: 7454338, 16197454338
• Category: Other Exterior Parts & Accessories

Purpose and role in the SCR system

The BMW G20/G21 Adblue Tank Active SCR Additive Reservoir is responsible for storing the urea solution used in the selective catalytic reduction process. A properly functioning tank is crucial for:

• maintaining the correct pressure and flow of AdBlue fluid in the system,
• stable operation of the SCR catalyst and reduction of nitrogen oxides,
• maintaining the full efficiency of the exhaust gas treatment system in diesel engines.

Using an original tank dedicated to the 3 Series allows for maintaining factory exhaust system operating parameters and avoids issues with OBD diagnostics and error messages on the dashboard.

Construction and fitment for BMW 3 Series G20/G21

The component has been designed specifically for the BMW G20 and G21 chassis architecture, which translates into precise installation fitment and compatibility with factory mounts and vehicle wiring. The tank construction is adapted to work with:

• original fluid level and temperature sensors,
• factory AdBlue pump and supply lines,
• electronic control of the SCR system in the specific BMW model.

As a result, installation is straightforward, without the need for system modifications or interference with the electrical harness, which is important for both durability and future service diagnostics.

Product characteristics and benefits

The presented Adblue Tank Active SCR Additive Reservoir is a BMW OE part, which means it adheres to the vehicle manufacturer's quality standards. In practice, the user gains:

• compliance with factory emission reduction system operating parameters,
• proper cooperation with engine and SCR control software,
• minimized risk of leaks and system venting issues.

The product is offered as a used item, which allows for an economical repair of the AdBlue system while maintaining original BMW specifications. It is a practical solution in the event of mechanical damage to the tank, failure of integrated accessories, or corrosion of the housing elements.

Professional installation and operation

Due to the importance of the SCR system for exhaust emissions and engine operation, installation by a workshop experienced with modern BMW diesel units is recommended. During replacement, it is worth paying attention to:

• the condition of the AdBlue supply lines and their seals,
• proper system venting after installation,
• the potential need for adaptation or clearing error codes in the engine control unit.

A correctly installed Adblue Tank Active SCR Additive Reservoir contributes to stable engine operation, reduced smoke, and maintaining the vehicle's compliance with current emission standards, which is significant for both operational and legal reasons.

Related components and powertrain development

If you are planning a comprehensive repair or upgrade of the exhaust gas treatment area in your BMW and need other components from the same group, such as fluid supply lines, level sensors, or mounting hardware, check out the available parts in the Other BMW category.

For extensive projects related to performance improvements or changes to the powertrain, it is also worth considering the impact of modifications on exhaust emissions and cooperation with the SCR system – practical tips regarding design differences in sports versions versus standard model variants can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?.