Removing and installing tank flap unit: Audi A3 1.8 (AJQ, AMU, APP, APX, …)

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020)

🔧 Engine codes this applies to

📐 43 workshop diagrams for AJQ

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Unfasten front section of wheel housing liner (right-side) and push to side (see the separate procedure).
2. Move drain hose clear at body.
3. Remove trim panel for tank flap unit (see the separate procedure).
4. Remove filler cap for filler neck of fuel tank.
5. Release tank flap unit at marked locations (arrows).

6. Push a small screwdriver at top of tank flap unit through marked locations into tank flap from below at an angle and over catches (in direction of -arrows-).
7. Pull screwdriver upwards slightly to release catches behind.
8. Insert screwdriver on underside of tank flap unit from above at an angle and push it in through marked locations.
9. Press screwdriver down slightly to release catches behind.
10. Pull tank flap unit with drain hose out of opening (one catch at a time).
11. Unplug electrical connector (1).
12. Disconnect manual release cable (rear) (4) from manual release cable (front) (3).
13. Detach tank flap unit (2).
14. Screw filler cap back onto fuel filler neck.
15. When installing tank flap unit, insert it in opening for tank flap on hinge side first and then press it in at rear.

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