Audi A8 D4 Headlight Halogen Vent Breather Hose Tube Line Left N/S 4H0941717C

Audi A8 D4 Headlight Twin Halogen Ventilation Breather Hose Tube Line is an original headlight ventilation system component, specifically designed for twin halogen headlights. Thanks to its precise construction, it ensures stable moisture drainage from inside the headlight, which promotes consistent lighting performance and reduces the risk of lens fogging.

Specifications and technical data

• SKU: 4H0941717C
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0941717C
• Substitutable numbers: 4H0941717C, 4H0 941 717 C
• Location on the vehicle: Left
• Category: Headlight Assemblies

Purpose and function in the front lighting system

The presented ventilation hose is a component dedicated to the Audi front lighting system, specifically for twin halogen headlights in the A8 D4 generation model. It is responsible for controlled air exchange inside the headlight housing, which helps maintain proper operating conditions for bulbs and electronics while reducing water vapor condensation.

Properly functioning headlight ventilation contributes to:

• more stable halogen lighting parameters,
• reduced risk of internal lens fogging,
• protection of optical elements and reflectors against excessive moisture.

Original origin and fitment for Audi

The hose comes from the line of original Audi components, which translates into compliance with factory design and material standards. As a result, the following are maintained:

• precise mounting points in the headlight housing,
• appropriate hose diameter and geometry,
• compatibility with the factory lamp ventilation system in the Audi A8 D4.

Such fitment facilitates installation and allows for maintaining the integrity of the entire front lighting system without the need for modifications.

Characteristics of the used component

The offered ventilation hose is a second-hand market component, which allows for an economical repair of the lighting system while maintaining the manufacturer's original specifications. A used component of this type is particularly attractive in situations where mechanical damage to the hose has occurred, while the headlight itself remains functional and does not require a complete replacement.

Choosing an original, used component allows for reduced service costs while maintaining compliance with the factory headlight design and the ventilation method intended by the manufacturer.

Importance of proper headlight ventilation

A functional ventilation hose in a twin halogen headlight has a direct impact on driving comfort and safety. Proper air circulation:

• helps maintain lens clarity from the inside,
• limits temperature fluctuations inside the lamp,
• supports long-term, stable operation of halogen bulbs.

Thanks to this, the driver gains better road visibility, and the entire front lighting system operates under conditions closer to factory specifications.

Expanding lighting system upgrades

If you are planning a comprehensive repair or upgrade of the front lighting zone in your Audi and need other elements from the same group, such as lamp housings, headlight inserts, or height adjustment components, check out the available parts in the Audi front lighting category.

If you want to better plan your service budget and learn practical tips on choosing used OEM components, it is worth reading our guide: Rising repair costs and the boom in used parts – how to save on car service?.