TorqFix

Removing and installing ISOFIX retainer: Audi A3

Step-by-step removing and installing ISOFIX retainer for the Audi A3: 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.

10 steps

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

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  • Make sure the cover does not tear at the opening for the ISOFIX bracket. — Pull cover (1) to front off ISOFIX brackets (2).
  • For greater clarity, padding is shown without cover in illustration.
  • 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 passenger's seat .
  2. With ignition switched off, disconnect battery earth wire 27.
  3. Attach front seat to seat repair standVAS 6136.
  4. Remove front seat backrest .
  5. Disengage fastening strips (1, 2, 3) on back of seat pan (4).
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. ⚠ Make sure the cover does not tear at the opening for the ISOFIX bracket. — Pull cover (1) to front off ISOFIX brackets (2).
  2. Remove bolts (2). [Note: For greater clarity, padding is shown without cover in illustration.]
  3. Lift ISOFIX retainer (1) off seat pan (3)(arrow). [Note: Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.]
  4. ⚠ 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. — Switch on ignition.
  5. ⚠ 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.