Removing and installing front pressure hose sensor for pedestrian protection G579 — AUDI
Removing and installing front pressure hose sensor for pedestrian protection G579 on Audi: 15 steps. What to remove, in what order, and what to check.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code FV
Don't miss
- Not all pressure hoses (2) have a coloured marking (3).If you are using a pressure hose (2) without a coloured marking (3), measure and mark the middle of the hose.
- Do not kink or stretch the pressure hose. — Insert pressure hose (4) into groove in moulded foam insert (3) and engage in bumper cover.
- Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.Make sure that wiring is not trapped.
- If the airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory .
📋 Procedure
- ⚠ Observe safety precautions when working on pyrotechnic components . — With ignition switched on, disconnect battery earth wire Electrical system27Battery; Disconnecting and connecting battery.
- Remove bumper cover General body repairs, exterior63Bumper (front); Removing and installing bumper cover.
- Remove spreader rivet (2) and disengage crash sensor (5) for pedestrian protection from bumper cover.
- Disengage pressure hose (4) from bumper cover and pull out of recess in moulded foam insert (3).
- ⚠ Before handling pyrotechnic components (e.g. unplugging the electrical connector) the mechanic must discharge any static electricity. This can be done by briefly touching the door striker plate, or similar. — Unplug electrical connector (1).
- To do so, pull out and press down connector locking element (2)(arrow) and unplug electrical connector (1) at crash sensor.
- Repeat procedure on opposite side.
- ⚠ Observe safety precautions when working on pyrotechnic components .Before handling pyrotechnic components (e.g. plugging in the electrical connector) the mechanic must discharge any static electricity. This can be done by briefly touching the door striker plate, or similar. — Insert pressure hose (2) centrally in groove in moulded foam insert (1), ensuring that coloured marking (3) is aligned with marking (4) on moulded foam insert. [Note: Not all pressure hoses (2) have a coloured marking (3).If you are using a pressure hose (2) without a coloured marking (3), measure and mark the middle of the hose.]
- Insert pressure hose into groove in moulded foam insert evenly in both directions (arrows).
- ⚠ Do not kink or stretch the pressure hose. — Insert pressure hose (4) into groove in moulded foam insert (3) and engage in bumper cover.
- Install crash sensor (5) for pedestrian protection in bumper cover and fit with spreader rivet (2).
- Plug in electrical connector (1).
- To do so, attach connector (1) to crash sensor (arrow) so that it engages audibly.
- Press in connector locking element (2) to secure connector. [Note: Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.Make sure that wiring is not trapped.]
- ⚠ The battery must be connected with the ignition switched on. If pyrotechnic components (e.g. airbag or belt tensioner) are inexpertly repaired, this may result in unwanted triggering after connecting the battery. There must not be anyone in the area of the bonnet when the battery is being connected. — With ignition switched on, connect battery earth wire Electrical system27Battery; Disconnecting and connecting battery. [Note: If the airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory .]
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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.