Audi A6 C7 A7 S7 4G Heater Air Intake Duct Channel Interior Heating 4G2819904A

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A6 C7 A7 S7 4G Heater Air Intake Duct Channel Interior Heating is an original interior ventilation system component designed to precisely direct airflow to the heating system. As part of the Air filter housings group, it ensures stable airflow and supports the proper operation of the air conditioning and cabin heating system. This used OEM component is a sensible choice for professional repairs or restoring factory airflow in Audi 4G series vehicles.

Specifications and technical data

• SKU: RHD-4G2819904A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G2819904A
• Substitutable numbers: 4G2819904A, 4G2 819 904 A
• Category: Air Filter Housings

Purpose and function in the heating system

The presented air intake duct is responsible for stable and airtight air delivery to the heater in Audi A6 C7, A7, and S7 4G generation models. A correctly selected element of this ventilation section:

• ensures the proper direction of airflow into the vehicle interior,
• reduces pressure losses in the intake duct,
• supports even distribution of warm air in the cabin,
• minimizes the risk of unwanted noise and vibrations in the ventilation system.

By maintaining factory geometry and mounting points, the duct works in harmony with other ventilation system components and the air filter housing, which translates into predictable behavior of the entire heating system.

Construction and fitment for Audi 4G series

As an original component from the Audi brand, the air intake duct was designed specifically for the interior architecture of the A6 C7, A7, and S7 4G models. This means:

• factory mounting points matched to the dashboard structure and heater housing,
• a shape optimized for airflow and turbulence reduction,
• compatibility with the original air filter housing and adjacent HVAC system components.

Such a solution facilitates installation and allows for consistency with other system elements, without the need for modifications or fitting aftermarket parts with uncertain geometry.

Benefits of using an original intake duct housing

Using an original air intake duct in the Air filter housings group for the Audi A6 C7 / A7 / S7 4G provides a number of practical benefits:

• maintaining factory heating and ventilation system efficiency,
• preserving proper airflow through the filter and heater,
• reducing the risk of window fogging resulting from incorrect airflow,
• easier HVAC system diagnostics due to the preservation of the original component configuration.

This solution is particularly recommended for post-collision repairs, replacing damaged ventilation system components, or restoring the car to a factory-like condition.

Condition, origin, and safety of choice

The offered air intake duct is a used component, sourced from disassembly, which allows for combining an attractive cost with the preservation of the manufacturer's original specifications. Choosing second-hand OEM parts is particularly beneficial where compliance with the factory design and certainty of fitment for a specific body version and heating system are important.

If you want to better prepare for purchasing components from the secondary market and avoid common mistakes when gathering parts for upgrades or repairs, it is worth checking out the guide Buying used car parts • Most common mistakes when choosing tuning parts, which helps in consciously planning investments in used components.

Expanding the air intake system in Audi

If you are planning a comprehensive repair or upgrade of the air intake and filtration area in your Audi and need other elements from the same group, such as supply ducts, filter housings, or additional air hoses, check out the available parts in the Audi Air filter housings category.