1. Offer title (exactly 69 characters)

Heater Air Duct 4K0819806 Audi A7 4K C8 A6 Air Tunnel OE

2. Product description

Heater Air Duct / Cabin Air Supply Hose – 4K0819806

Original air supply duct / heater housing manifold hose (HVAC ventilation tunnel section delivering the air stream to the console area, windshield, or cabin vents on the right side), designed for Audi A7 Sportback, S7 and RS7 (4K / 4K8 generation) and Audi A6 C8 (type 4K2 / 4K5 / 4KA) produced from model year 2018 to 2026, including versions with 3.0 V6 TFSI (55 TFSI), 2.0 TFSI (40/45 TFSI), TDI diesel engines and top-tier S and RS models based on the modular longitudinal MLBevo platform.

Original VAG group heating, ventilation and air conditioning (HVAC) system component. Made of durable technical plastic resistant to cyclic temperature fluctuations, high heat, and cockpit vibrations. Mounted under the dashboard in the immediate vicinity of the central heater unit. It is responsible for precisely, directionally, and fully leak-tightly guiding the air stream to the outlet vents without air pressure loss, preventing heat or cooled air from escaping under the dashboard and eliminating unwanted whistling and flow noise.

Technical specifications:

• Catalog part number (OE): 4K0819806 / 4K0 819 806 (interchangeable with revisions from the 4K0819806A, 4K0819806B series; the symmetrical/opposite side component is available under number 4K0819805)

• System / Category: Heating and air conditioning system / Air ducts, heaters and vents (Heater Air Duct / Climate Control Air Guide Channel)

• Function: Duct guiding air from the heater to the cabin vents

• Material / Color: Black (VAG OEM structural plastic)

• Mounting location: Vehicle interior – cockpit / windshield area (under the dashboard, near the heater unit)

• Dedicated model: Audi A7 Sportback / S7 / RS7 (type 4K8) and Audi A6 / Avant / Allroad (type 4K / C8)

• Steering side: Left (LHD – European version)

• Construction: Precisely profiled tunnel with factory snap-fit flanges at the connections and mounting points for mounting clips

• Condition: Original part, used (100% functional – no cracks, no broken tabs on the connecting edges, sealing flanges fully intact, profile undamaged)

• Manufacturer: Audi AG / VAG (OEM Original)

Main application:

• Audi:

  • A7 Sportback (type 4K8) – model years from 2018 to 2026 (all engine versions and 2- and 4-zone climate control configurations)

  • S7 Sportback (type 4K8) – model years from 2019 to 2026

  • RS7 Sportback (type 4K8) – model years from 2019 to 2026

  • A6 / A6 Avant / Allroad (type 4K2 / 4K5 / 4KA - C8) – model years from 2018 to 2026

  • S6 / RS6 Avant (type 4K - C8) – model years from 2019 to 2026

Fitment guarantee and VIN verification

Each duct undergoes a detailed inspection of the mounting flanges for cracks and is thoroughly cleaned before shipping.

Fitment / installation tip: The initial designation 4K0 (ventilation system group 819) confirms the geometry adapted to the modular MLBevo platform in the left-hand drive (LHD) version. The component may be damaged during dashboard removal, repairs after passenger airbag deployment, or heater core replacement. A cracked or leaking duct results in reduced airflow through the vents and annoying whistling of compressed air under the cockpit. The original OEM component ensures factory fitment on the snap-fits without the need for modifications. Before purchase, we recommend comparing the OE number embossed on the part body or verifying it using the vehicle's VIN.