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Removing and installing four-way lumbar support (version 1) — AUDI

Removing and installing four-way lumbar support (version 1) on Audi: 11 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.

11 steps

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

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  • Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.
  • If airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the fault memory .

📋 Procedure

  1. ⚠ Observe safety regulations for pyrotechnic components .Before handling pyrotechnic components (e.g. unplugging the electrical connector) the mechanic must discharge static electricity by briefly touching the door striker plate, or similar. — Remove front seat:
  2. Attach seat to seat repair standVAS 6136.
  3. Remove backrest cover panel .
  4. Remove cover with padding .
  5. Drill out rivet (2) at rear of backrest frame (1).
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Drill out rivets (6) on side of backrest frame.
  2. Disengage mounting (3) for four-way lumbar support (4) with clips (2) (top) out of backrest frame and take out.
  3. Unplug electrical connectors (1) and (5) for lumbar support adjustment.
  4. Detach four-way lumbar support.
  5. ⚠ Observe safety regulations for pyrotechnic components .Before handling pyrotechnic components (e.g. plugging in the electrical connector) the mechanic must discharge static electricity by briefly touching the door striker plate, or similar. — Before setting rivet (4), insert plastic washer (2) between four-way lumbar support (1) and backrest frame (3). [Note: Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.]
  6. ⚠ 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. — With ignition switched on, connect battery earth wire 27. [Note: If airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the fault memory .]

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.

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Workshop data on this page last updated 20 Sep 2026.