TorqFix

Removing and installing drain pipe for tank flap unit — AUDI

Removing and installing drain pipe for tank flap unit on Audi: 11 steps. What to remove, in what order, and what to check after.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

11 steps

🧭 Before you start

Fits: platform code 42

📋 Procedure

  1. ⚠ When installing, it is important that the drain pipe for the tank flap unit is installed properly.After installing, check that the drain pipe is installed correctly and that it drains properly by pouring some water into the tank flap unit. The water should drain out of the drain pipe at the bottom outside the side member trim. — Remove side panel trim with tank flap unit .
  2. Remove cover (right-side) for fuel tank .
  3. Remove noise insulation (front) .
  4. Remove bolts (arrows).
  5. Detach drain pipe (1) downwards.
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Guide out drain pipe (2) between noise insulation (front) (1) and side member.
  2. Secure drain pipe to body (arrows) and check dimension (a).
  3. Adjust dimension (a) if necessary.
  4. Install noise insulation (front) .
  5. Install cover (right-side) for fuel tank .
  6. Install side panel trim with tank flap unit .

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.

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Workshop data on this page last updated 20 Sep 2026.