Removing and installing alarm horn H12 — VW
Removing and installing alarm horn H12 on VW: 14 steps, 5 torque figures. What to remove, what to tighten and to how many Nm, what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Passat B7 saloon (362, 2010–2014), VW Passat B7 Variant (365, 2010–2014)
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- Remove any swarf caused by drilling.
- For reasons of clarity, the alarm horn H12 is not shown in the following illustration, therefore the connector is shown disconnected.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 16 Nm (12 lb-ft) | Tighten securing nuts |
| 20 Nm (15 lb-ft) | Tighten M8 nut that secures alarm horn to bracket |
| 20 Nm (15 lb-ft) | Tighten securing nuts to specified torque |
| 4 Nm (3.0 lb-ft) | Tighten securing nuts of alarm horn H12 bracket to plenum chamber bulkhead |
| 9 Nm (6.6 lb-ft) | Tighten bolt |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- Switch off ignition and all electrical consumers.
- Disengage ignition key out in position 0 (forward notch).
- Remove front right wheel housing liner General body repairs, exterior66Wheel housing liner; Removing and installing wheel housing liner.
- Use drillVAS 5134 and a drill bit (6 mm in diameter) to drill out the heads of both pop rivets (arrows).
- Release and detach the connector through the opening in the housing with the help of a small screwdriver and remove alarm horn H12 from wheel housing.
- Unscrew hexagon nut on backside of housing.
- Remove alarm horn H12 from housing.
- Use drillVAS 5134 and a 2.5 mm spiral drill bit to drill out and remove the two pop rivets (arrows). [Note: Remove any swarf caused by drilling.]
- Perform necessary corrosion protection measures Allgemeine HinweiseCorrosion protection measures; Corrosion protection.
- Insert alarm horn H12 into housing and secure with hexagon bolt.
- Attach connector to alarm horn H12 so that it engages in the latch. [Note: For reasons of clarity, the alarm horn H12 is not shown in the following illustration, therefore the connector is shown disconnected.]
- Guide clip (2) of alarm horn H12 into aperture in body (1).
- Align housing with the holes in the body and secure to body with new blind rivets.
- Install front right wheel housing liner General body repairs, exterior66Wheel housing liner; Removing and installing wheel housing liner.
Other VW procedures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
- Removing and installing easy-entry Bowden cable A
- Removing and installing easy-entry Bowden cable B
- Removing and installing lid lock - LHD vehicle
- Removing and installing tank flap unit – VW Jetta VI
- Removing and installing ignition key battery – VW
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.