Audi A4 B9 Auxiliary HV Battery Degassing Vent Hose Line 8W0915495B

Audi A4 B9 Auxiliary HV Battery Degassing Vent Hose Line is a specialized high-voltage system component responsible for the safe venting of gases from the traction battery. A properly selected degassing vent hose ensures stable battery operating conditions and reduces the risk of gas accumulation in the battery compartment, which is crucial for both component durability and user safety. This item from the Lines, hoses and pipes group is designed for use in Audi vehicles equipped with an HV battery.

Specifications and technical data

• SKU: 8W0915495B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0915495B
• Substitutable numbers: 8W0915495B, 8W0 915 495 B
• Category: Hoses, Lines & Pipes

Function and role of the HV battery degassing vent hose

The degassing vent hose in the high-voltage system is responsible for the controlled discharge of gases generated during the operation and charging of the traction battery. A correctly selected and sealed hose:

• stabilizes cell operating conditions by venting excess gases outside the battery housing,
• reduces the risk of local pressure build-up in the HV battery area,
• supports the maintenance of an appropriate microclimate in the battery installation space,
• ensures a predictable gas discharge path, in accordance with the manufacturer's design specifications.

As a result, the high-voltage system maintains operational stability, and other components near the battery are less exposed to the adverse effects of gases.

Construction and fitment in the Lines, hoses and pipes group

The HV battery degassing vent hose belongs to the group of components that form closed and semi-open media flow paths in the vehicle. In the case of a high-voltage battery, precise matching of the hose shape and diameter to the factory routing system is crucial, which allows for:

• maintaining proper positioning relative to the battery housing and body components,
• preserving the gas discharge path designed by the manufacturer,
• minimizing mechanical stress and the risk of abrasion during operation.

A properly selected item from the Lines, hoses and pipes category allows for installation in accordance with the factory geometry of the system, without the need for modifying adjacent components.

Characteristics of the used component

The offered degassing vent hose is a dismantled, used part, which in practice means it has already been verified for suitability for further use. Such a component, provided there is material continuity and no functional damage, can still effectively perform its task in the HV system. Choosing a used hose from a renowned vehicle manufacturer allows for maintaining the factory geometry and operating characteristics of the degassing system while reducing service costs.

Application in Audi vehicles with an HV system

The HV battery degassing vent hose is intended for use in Audi vehicles where the manufacturer has provided a dedicated system for venting gases from the high-voltage battery. Using an original solution from the same construction group allows for:

• maintaining compliance with the factory safety requirements of the HV system,
• preserving correct hose routing relative to mounts and covers,
• reducing the risk of leaks resulting from the incorrect selection of a universal replacement.

Before installation, it is recommended to verify the compatibility of the component with the specific vehicle configuration, in particular with the version of the high-voltage system used in the given unit.

Benefits of using an original degassing vent hose

Using an original HV battery degassing vent hose in an Audi vehicle translates into a number of practical service and operational benefits:

• maintaining the factory hose routing and mounting points,
• reducing the risk of interference with other HV system elements,
• consistency with other components from the Lines, hoses and pipes group,
• the possibility of predictable degassing system operation in the long term.

For vehicles with hybrid or electric powertrains, maintaining the proper operation of the HV battery degassing system is important both from the point of view of safety and the durability of the entire high-voltage system.

If you are planning a comprehensive repair or upgrade of the high-voltage system area in your Audi and need other elements from the same group, such as breather lines, media hoses, or additional service pipes, check the available parts in the Audi Lines, hoses and pipes category.