Audi Q7 4L AdBlue Additive Passive Reservoir Tank 3.0 TDI Diesel 4L0131877B

Visual condition of the part

The product shows signs of use visible in the photos.

Audi Q7 4L AdBlue Additive Passive Reservoir Tank 3.0 TDI Diesel is an original fuel system component, belonging to the Fuel tanks and filler pipes group, designed specifically for diesel engines. It enables the correct dosing of the AdBlue additive in the diesel engine, which translates into stable operation of the exhaust gas treatment system and compliance with emission standards.

Specifications and technical data

• SKU: 4L0131877B
• Mark: Audi
• Condition: Used
• OEM Part Number: 4L0131877B
• Substitutable numbers: 4L0131877B, 4L0 131 877 B
• Fuel type: Diesel
• Part type: Fuel Tank
• Category: Fuel Tanks & Filler Necks

Purpose and role in the diesel fuel system

The presented AdBlue additive tank is a component that works with the diesel engine's fuel system, where precise dosing of the urea solution into the exhaust system is crucial. Thanks to its design dedicated to Audi Diesel engines, this component ensures stable operating conditions for the nitrogen oxide emission reduction system, which is important for both the durability of the engine and meeting environmental requirements.

A properly selected AdBlue additive tank reduces the risk of engine control unit errors related to incorrect fluid levels and helps maintain correct combustion characteristics over a long period of operation.

Construction and fitment for Audi

As a component intended for Audi vehicles, the tank has been designed with the correct placement of ports, mounts, and connections in mind, which facilitates installation in the factory-designated location. The appropriate housing geometry allows for collision-free routing of hoses and integration with the existing AdBlue additive supply and control system.

The component belongs to the Fuel tanks and filler pipes group, making it structurally prepared to work in an environment exposed to temperature changes, vibrations, and contact with operating fluids used in diesel vehicles.

Condition, verification, and service application

The offered item is in used condition, making it an attractive service solution for users looking for a technically sound component at a reasonable price. This type of tank can be used both for routine repairs and for comprehensive maintenance of the AdBlue additive supply system, for example, in the event of damage to the housing, connections, or internal working elements in the previously installed module.

Selecting parts according to the vehicle manufacturer's markings and reference numbers allows for precise matching of the tank to the specific configuration of the Audi Q7 4L with a diesel engine, minimizing the risk of installation problems and incompatibility with the vehicle's system.

Benefits of using an original AdBlue tank

Using an original AdBlue additive tank in an Audi Q7 4L 3.0 TDI brings a number of practical benefits:

• maintaining proper cooperation with the diesel engine control system,
• proper fitment to factory mounts and hoses,
• reducing the risk of leaks and errors related to the AdBlue additive level,
• support for stable operation of the exhaust emission reduction system.

Thanks to this, the vehicle maintains proper operating parameters, and the driver avoids typical problems associated with the malfunction of the AdBlue system, such as loss of power or messages about limited starting capability.

Integration with the fuel system and service knowledge

When planning work on the fuel and AdBlue additive system, it is worth considering a holistic approach to diagnostics – covering the tank, as well as hoses, pumps, and control elements. To deepen your knowledge about the construction and maintenance of the fuel system in diesel vehicles, including the principles of selecting components by OEM numbers and regeneration methods, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you are planning a comprehensive repair or upgrade of the fuel supply and storage area in your Audi and need other elements from the same group, such as additional tanks, hoses, or filler pipes, check the available parts in the Audi fuel tanks and filler pipes category.