Audi A8 D4 A8 S8 4H Adblue Tank Breather Pipe D Hose Line Tube 4H0131987D

Audi A8 D4 A8 S8 4H Adblue Tank Breather Pipe D Hose Line Tube is an original exhaust emission reduction system component, designed for the luxury Audi A8 D4 and S8 models. It ensures stable venting of the AdBlue tank, which supports the proper operation of the SCR system and helps maintain compliance with emission standards. Thanks to its factory design, this part is perfectly suited for installation in vehicles of this series.

Specifications and technical data

• SKU: 4H0131987D
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0131987D
• Substitutable numbers: 4H0131987D, 4H0 131 987 D
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the AdBlue system

The breather pipe in the AdBlue system is responsible for the controlled discharge of vapors and pressure equalization in the tank, which reduces the risk of malfunctions in the pump and sensors. In the case of Audi A8 D4 and S8 models, this component works with the factory exhaust treatment system, supporting stable dosing of the AdBlue solution into the SCR catalyst.

Replacing the pipe is particularly recommended when problems with tank venting occur, AdBlue system error messages appear, or there are signs of leaks in the installation area. Using an original component from the Pipes, hoses, and tubes category allows you to maintain the integrity of the entire system.

Construction and fitment for Audi A8 D4 / S8

The pipe was designed by the manufacturer with the specific geometry of the vehicle's rear compartment in mind, which facilitates routing the installation according to factory mounting points. The appropriately selected diameter and shape of the pipe promote proper gas flow and minimize the risk of kinks during installation.

As an Audi brand component, the pipe features a design consistent with other AdBlue system parts, which facilitates integration with the existing installation and limits the need for modifications. This is the preferred solution for servicing premium cars, where precision and compliance with the factory design are essential.

Part condition and installation aspects

The offered pipe is a used component, which allows for an economical repair of the system while maintaining the manufacturer's original specifications. This type of part is a good choice in situations where the existing pipe has suffered mechanical damage, abrasion, or shows signs of leakage.

During installation, it is recommended to:

• check the condition of the connectors and ports in the tank and the rest of the installation,
• check for leaks after starting the AdBlue system,
• use new clamps or fasteners if required by the service procedure.

Benefits of using an original pipe

Using an original breather pipe in the Audi A8 D4 / S8 brings a number of practical benefits:

• Compatibility with the factory SCR system – the pipe is designed for a specific vehicle platform, which promotes trouble-free system operation.
• Stable AdBlue tank venting – reduces the risk of controller errors and problems with solution dosing.
• Consistency with other installation components – no need for adaptation or modification of the pipes.
• Reasonable repair cost thanks to the use of a used part while maintaining the original design.

Support with selection and further system expansion

If you are planning comprehensive maintenance of the AdBlue system or other fluid installations in your Audi, it is worth checking out other items from the pipes and tubes group available in our store. This will make it easier to complete all the necessary components in one place and streamline service work.

For drivers who want to better understand the specifics of original parts for popular models, we have prepared a practical guide – check out our guide to the most frequently chosen used car parts to consciously plan further repairs and upgrades for your car.