Heater Air Duct / Air Distribution Duct (Left Side) – 4K1819655

Original air duct for the blower and heater unit (ventilation duct distributing air from the central HVAC module to the left dashboard area / center console or driver's footwell), designed for Audi A7 Sportback, S7 and RS7 (4K / 4K8 generation) and Audi A6 C8 (type 4K2 / 4K5 / 4KA) models produced from 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 ventilation and air conditioning system component. Made of lightweight yet durable polymer (PP/EPDM/PE) resistant to temperature fluctuations. Mounted directly behind or beneath the dashboard on the driver's side. It ensures a directed, quiet, and leak-tight flow of air from the heater/evaporator to the air vents, preventing heat loss and air leakage into the spaces behind the cockpit.

Technical specifications:

• Catalog part number (OE): 4K1819655 / 4K1 819 655 (interchangeable with revisions 4K1819655A, 4K1819655B; the symmetrical right-side component is available under part number 4K1819656)

• System / Category: Heating, ventilation and air conditioning (HVAC) / Air ducts, air supply tunnels and distributor ducts (Air Duct / Heater Ventilation Air Channel Left)

• Function: Heater / dashboard air distribution duct – left side

• Material: VAG OEM plastic with enhanced thermal resistance

• Mounting location: Vehicle interior – beneath the dashboard on the left side / near the heater housing and center tunnel

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

• Steering wheel side: Left (LHD – European version)

• Mounting: Press-fit into factory recesses / snap-fit socket connections

• Condition: Original used part (100% functional – no cracks, no thermal deformation, flanges and mounting clips intact, sealing foam in good condition)

• Manufacturer: Audi AG / VAG (OEM original)

Main application:

• Audi:

  • A7 Sportback (type 4K8) – model years 2018 to 2026 (all engine and equipment versions with automatic climate control)

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

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

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

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

Fitment guarantee and VIN verification

Each air duct undergoes an inspection of the mounting edges and a check for mechanical damage before packaging.

Fitment / installation tip: The initial designation 4K1 (ventilation group 819) along with the odd final digit 655 uniquely identifies the duct dedicated to the left side for the European body style with left-hand drive (LHD). It forms a pair with the previously described right duct 4K1819656. Cracked or leaking air ducts after a collision cause air whistling at higher blower speeds, reduced heating/cooling efficiency, and unwanted heating of the spaces behind the MMI screens. The original OEM duct guarantees factory-standard seal tightness at the socket connections. Before purchase, we recommend comparing the OE number embossed on the plastic or verifying it using the vehicle's VIN.