why does my Volkswagen Golf Eighth Generation (2020-present) airbag light stay on

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent accidental airbag deployment.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.

2. Scan and Diagnose

• Use the OBD-II scanner to read the airbag codes and note any specific errors (e.g., "B1998 - Airbag Sensor Fault").
• Clear the codes and see if they reappear after a short drive or ignition cycle.

3. Inspect and Repair Wiring

• Visually inspect the airbag wiring harness for frays or disconnections.
• If any connections are loose or corroded, repair or replace the connectors.
• Ensure that all connectors to the airbag module and seatbelt pretensioners are secure.

4. Replace Faulty Components

• If the diagnostic codes indicate a faulty airbag control module or any airbag unit, proceed with replacement.
  • For Airbag Control Module:
    1. Remove the dashboard cover (if applicable) to access the module.
    2. Unplug the old module and replace it with a new one, ensuring correct alignment.
    3. Reinstall the dashboard cover.
  • For Airbag Sensors/Pretensioners:
    1. Remove the seat or panel covering the pretensioner.
    2. Disconnect the faulty component and replace it with a new unit.
    3. Reinstall the seat or panel.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and check if the airbag light remains off after self-diagnostics.