Removing and installing anti-theft alarm sensor G578 - Cabriolet — AUDI
Removing and installing anti-theft alarm sensor G578 - Cabriolet on Audi: 10 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.
🧭 Before you start
Fits: Audi A3 (8V, 2012–2020); platform code 85
📋 Procedure
- Remove front roof module .
- Carefully press trim panel (1) out through opening on windscreen frame trim (2).
- Release catches (arrows) and pull out mounting (3) for individual sensor.
- Release catch (2) and pull individual sensor (1) out of mounting (2)(arrow).
- Release retaining clips (arrows) and remove anti-theft alarm sensor (2) from interior light/reading light.
- Release catch (4) and remove individual sensors (1, 3) for interior monitoring from interior light/reading light.
- Detach anti-theft alarm sensor.
- Press trim panel for individual sensor into lower windscreen frame trim until it engages properly.
- Insert individual sensor into mounting.
- Press mounting into trim panel until it engages properly.
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
- Removing and installing cooler for fuel cooling system - vehicles with engine code BTR/CCFA
- Removing and installing pressure differential sender G505/G524
- Removing and installing cooler for engine oil and ATF
- Removing and installing base for shift unit – Audi Q7
- Draining ATF – Audi Q7
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.