Removing and installing knee airbag with airbag igniter (driver side) — AUDI

🧭 Before you start

Fits: Audi TT Mk2 (8J, 2006–2014)

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• Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.Make sure that wiring is not trapped.
• Once an airbag has been triggered the airbag securing components must be renewed.
• If airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the fault memory .

📋 Procedure

1. Move driver's seat to rearmost position and set backrest to 45° position.
2. ⚠ Observe safety regulations for pyrotechnic components .Observe disposal regulations for pyrotechnic components . — Switch off ignition.
3. Disconnect battery earth wire with ignition switched off Electrical system27Battery; Disconnecting and connecting battery.
4. Remove knee bolster (dash panel cover, driver side) .
5. Unclip 16-pin connector T16 for diagnostic connector.

6. Unscrew bolts (A) (below knee airbag (1)) and (B) (above knee airbag).
7. Then pull air duct (driver's footwell) (2) off air duct (front passenger's footwell) (3).
8. ⚠ 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 knee airbag connector (yellow).
9. To do so, pull catch (2) in direction of (arrow) and unplug electrical connectors (1) and (3).
10. Remove nuts (2) from support on left (3) and right (4).
11. Slacken nuts (5) approximately 3 turns and remove knee airbag (driver side) (1) towards the rear.
12. Set down airbag unit (1) with impact cushion facing upwards.
13. ⚠ Observe safety regulations for 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. — Slide knee airbag (1) in until it touches support (left-side (3) and right-side (4)).
14. First tighten nuts (2) and then nuts (5) to torque. [Note: Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.Make sure that wiring is not trapped.]
15. Once an airbag has been triggered the airbag securing components must be renewed.
16. ⚠ 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 vehicle while you are connecting the battery. — Switch on ignition.
17. Connect battery earth wire with ignition switched on Electrical system27Battery; Disconnecting and connecting battery.
18. If airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the fault memory .

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