Removing and installing electronics box in luggage compartment — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform code 85

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• Exact assignment of contacts can be found in applicable current flow diagram .

📋 Procedure

1. Disconnect earth cable from battery with ignition switched on .
2. Remove moulded insert for tools.
3. Release quick release fasteners (1, 3) and open cover (2)(arrow).
4. Unscrew nuts and remove electrical wiring (6).
5. Unplug electrical connector (1).

6. ⚠ 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. — Release connector locking element with a small screwdriver and unplug electrical connector (5) at battery isolation igniter.
7. Unscrew nuts (3, 7) and remove electrical wires (4, 8).
8. Remove nuts (arrows).
9. Detach electronics box (2). [Note: Exact assignment of contacts can be found in applicable current flow diagram .]
10. ⚠ The ignition must be switched on when re-connecting the battery. If pyrotechnic components (e.g. airbag or belt tensioner) are inexpertly repaired, this may result in unwanted triggering after connecting the battery. When re-connecting the battery, there must not be anyone inside the vehicle. — Connect battery with ignition on. Steps required .
11. As a final step, interrogate event memory of airbag control unit J234 and deal with any entries .

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