Removing and installing rain sensor: Audi A3

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

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• If re-installing the same rain sensor please proceed as follows:
• The surface on the sensor must be completely free of foil remnants. — Detach the silicone paper from the sensor foil.
• To remove the sensor please proceed as already described.
• Press sensor onto windscreen making sure you do not trap any air bubbles and position retaining clip on mirror base.
• To ensure it functions correctly, the rain sensor must be fitted in such a way that it makes contact with the windscreen without trapping any air bubbles. — Unplug connector.

📋 Procedure

1. Exterior mirror removed 70
2. Detach clip (3) from retainer plate (1) for mirror base.
3. Unplug electrical connector leading to rain sensor.
4. Remove rain sensor from mirror base.
5. Sensor foil will remain attached to windscreen.

6. If you are re-installing the same windscreen, the sensor foil has to be completely removed from the glass.
7. Clean glass surface using cleaning solution D 009 401 04. [Note: If re-installing the same rain sensor please proceed as follows:]
8. Remove any remains of the sensor foil from the rain sensor.
9. In addition, clean surface using cleaning solution D 009 401 04.
10. ⚠ The surface on the sensor must be completely free of foil remnants. — Detach the silicone paper from the sensor foil.
11. Transparent protective film remains on the sensor foil for the time being in order to facilitate installation.
12. Place sensor foil on rain sensor, using protective film as an aid.
13. Press sensor foil onto rain sensor in direction of (arrow) (as shown in illustration), making sure there are no air bubbles.
14. Pull transparent protective film off sensor foil.
15. Spray cleaning solution D 009 401 04 onto entire surface of sensor foil and insert sensor in mirror base.
16. ⚠ To ensure it functions correctly, the rain sensor must be fitted in such a way that it makes contact with the windscreen without trapping any air bubbles. — Press retaining clip for sensor onto mirror base. [Note: To remove the sensor please proceed as already described.]
17. Remove any remnants of the "old" rain sensor foil from the windscreen.
18. Clean contact surface of sensor on windscreen using cleaning solution D 009 401 04.
19. Detach protective film from sensor foil.
20. Spray cleaning solution D 009 401 04 onto entire surface of sensor foil and insert sensor in mirror base.
21. Press sensor onto windscreen making sure you do not trap any air bubbles and position retaining clip on mirror base.
22. ⚠ To ensure it functions correctly, the rain sensor must be fitted in such a way that it makes contact with the windscreen without trapping any air bubbles. — Unplug connector.
23. Use a small screwdriver or similar tool to press retaining clip (2) outwards at points marked by (arrows).
24. Detach retaining clip (2) from mirror base (1).
25. Take rain and light sensor G397(3) out of mirror base.
26. Sensor foil will remain attached to the windscreen.
27. If you are re-installing the same windscreen, the sensor foil has to be completely removed from the glass.
28. Clean glass surface using cleaning solution D 009 401 04.

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