Removing and installing condensation drain: Audi Q7

🧭 Before you start

Remove the glove compartment or driver-side dash cover, fold back the carpet and lay absorbent paper under the floor openings. Take off both drain hoses, probe the heater unit drains with wire, and confirm there is room for water to leave the hose end above the tunnel insulation. Refit the hoses untwisted and uncrushed, press the drain firmly into the floor panel, and lay the carpet back without squashing anything.

Fits: Audi Q7 (4M, 2015–)

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• Put absorbent paper under the floor openings first so released water does not soak under the carpet.
• Left and right hoses are different versions; fit each to its own side, neither twisted nor crushed.
• Press the drain firmly into the floor panel; if it will not seal, use silicone adhesive sealant on the joint.
• If a hose sits loosely on the heater unit drain, secure it with a clip so it cannot slip off.
• Check the gap between the insulating mat and the hose end so condensate can actually escape.

Written for this job from the workshop steps below · TorqFix editorial.

📋 Procedure

1. Switch off ignition.
2. Remove the glove compartment (for condensation drain, right-side) General body repairs, interior68Shelves/storage compartments/covers; Removing and installing glove compartment
3. Remove dash panel cover on driver side (for left condensation drain) General body repairs, interior68Shelves / trim panels; Removing and installing dash panel cover (driver side).
4. Carefully fold back the floor covering in the area of the condensation drain hose (front left or front right at centre tunnel) until the condensation drain is visible.
5. Check that both condensation drain hoses (B) are correctly routed and not dirty. For example, eliminate any cross-sectional constrictions.

6. Cover area beneath the two openings (D) (for drain holes of condensation drain (C)) with absorbent paper to prevent any water from running beneath floor covering.
7. Remove the two condensation drain hoses (B).
8. Use e.g. a piece of wire to check for dirt in the two condensation drains of the heater and air conditioning unit (A).
9. Check distance between insulating mat (E) in centre tunnel and end of condensation drain hose (C) via openings (D) in floor panel (F). There must be enough of a gap for condensate to drain out of condensation drain hose (B).
10. Fit the two condensation drain hoses (B) such that they are neither twisted nor crushed (different versions for left and right side) Electronic parts catalogue.
11. Insert the condensation drain (B) and press firmly into the floor panel (F). [Note: To prevent condensation from escaping from the condensation drain (B) into the passenger compartment, the condensation drain (B) must be pressed firmly against the floor panel (F) after fitting. If not sufficiently tensioned, seal the joint between the two components with silicone adhesive sealant D176 001 A3 for example Electronic parts catalogue.]
12. When fitting floor covering, take particular care to ensure that it does not squash the condensation drain hose (B).
13. If a condensation drain hose (B) is not fitted securely enough to the condensation drain of the heater and air conditioning unit (A), secure it e.g. with a clip if necessary to prevent it from slipping off.

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