Removing and installing air duct with defrost flap for left dash panel vent/side window — AUDI
Removing and installing air duct with defrost flap for left dash panel vent/side window on Audi: 13 steps.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A8 D4 (4H, 2010–2017)
📋 Procedure
- Move driver's seat to rearmost position.
- Switch off ignition.
- Remove storage compartment beneath dash panel on driver side General body repairs, interior68Shelves/storage compartments/covers; Removing and installing driver side dash panel trim
- Remove left dash panel vent (C)General body repairs, interior70Dash panel; Removing and installing dash panel vent.
- Remove the bolt (A).
- Remove the air duct to the left side window (B).
- Unplug the connector (B) from the control motor for left side window defroster flap V409(C).
- Remove the expanding rivet (A).
- Remove the expanding rivet (E) by way of the opening in which the air duct for the left side window was fitted.
- Remove the expanding rivet (F) by way of the opening in which the air duct for the left side window was fitted or from underneath.
- Remove the air duct with the defrost flap for the left dash panel vent/side window (D).
- Perform basic setting and final control diagnosis for the air conditioner in "“Guided Fault Finding”" mode. [Note: The control motors on this vehicle are equipped with electronics. A new control motor only learns its position at the air conditioning unit in the course of basic setting and can then be activated by the air conditioner front operating and display unit, Climatronic control unit J255 (all control motors are identical at present) in "“Guided Fault Finding”" mode.While you are performing the basic setting, the control motors are assigned and adapted in accordance with the series connection of the wiring. If the sequence is not as specified, the control motors will not be adapted properly and the flaps will not be controlled correctly Overview of control motors of air conditioner.]
- Interrogate the event memory of J255 and erase any faults displayed in "“Guided Fault Finding”" mode.
Other AUDI procedures
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
- Testing accelerator position sender -G79 – Audi 1.9 TDI 1Z/AHU
- Testing signals from and to automatic gearbox – Audi 1.9 TDI
- Checking injection quantity, leak tightness and spray pattern of injectors
- Checking air mass meter -G70 with CO-potentiometer -G74 for control unit-Nr. 4A0 906 266/A/AA/AB (ä 08.92)
- Checking EGR valve -N18
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.