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 BMW design, it ensures proper operation of the SCR system and stable dosing of the AdBlue solution, which translates into compliance with emission standards and trouble-free operation. This used OEM component is a sensible choice for repairs where fitment, durability, and cost control are essential.

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

Function and role of the AdBlue SCR tank in the BMW G20/G21

The AdBlue tank in BMW G20 and G21 models is a key component of the selective catalytic reduction system, responsible for storing the urea solution used to reduce nitrogen oxides in exhaust gases. A properly functioning tank:

• ensures a stable supply of the working medium to the SCR system,
• maintains tightness and resistance to the thermal conditions of the chassis,
• works in conjunction with dosing equipment and level sensors,
• allows for maintaining the full efficiency of the exhaust gas treatment system in BMW engines.

Thanks to its OEM design, the tank is precisely matched to the 3 Series chassis architecture, which facilitates installation and minimizes the risk of operational issues.

Compatibility and fitment for the SCR system

The presented BMW AdBlue SCR tank has been designed specifically for the G20/G21 platform, which means compatibility with the factory mounting system, hose routing, and connector placement. In practice, this translates into:

• the possibility of installation in place of the original component without structural modifications,
• compatibility with factory electronic control and onboard diagnostics,
• maintaining the operating parameters of the emission reduction system according to the manufacturer's specifications.

Proper component fitment for a specific BMW generation reduces the risk of engine control unit errors and AdBlue system failure messages.

Product characteristics and advantages of using OEM parts

As a part from the original BMW parts group, the AdBlue SCR tank is distinguished by a design consistent with factory technical documentation. Compared to aftermarket replacements, this ensures:

• preservation of the geometry and working capacity designed by the manufacturer,
• appropriate material resistance to the AdBlue solution and road conditions,
• consistency with factory service and diagnostic procedures.

The used OEM component is particularly attractive for maintenance repairs when the priority is to combine original quality with a reasonable service budget.

Service purpose and practical application

The AdBlue SCR tank for the BMW G20/G21 will prove useful primarily in situations where the existing component has suffered mechanical damage, external corrosion, or a failure related to leakage. Replacing it with an original tank allows you to:

• restore full functionality of the exhaust emission reduction system,
• eliminate AdBlue system error messages on the dashboard,
• maintain vehicle compliance with environmental requirements and technical inspections.

For workshops specializing in the BMW brand, such a component is a valuable solution for comprehensive exhaust gas treatment system repairs in modern powertrains.

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 supply lines, dosing modules, or mounting elements, check out the available parts in the Other BMW category.

Technical support and knowledge about high-performance systems

When working with advanced powertrains and emission reduction systems, it is worth using reliable sources of knowledge. To better understand the design differences between standard and sports versions and the impact of technical solutions on operation, read the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers design powertrains and accompanying systems in high-performance vehicles.