Audi A4: Driver Front Airbag Crash Sensor -G283-, Removing and Installing

  Note

The Passenger Side Front Airbag Crash Sensor -G284- is removed and installed the same way.

Removing

  WARNING

Risk of injury due to involuntary deployment.

Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".

- Disconnect the battery ground cable with the ignition turned on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

- Passenger Side Front Airbag Crash Sensor -G284-: Remove the air filter housing. Refer to → Rep. Gr.23; Air Filter; Air Filter Housing, Removing and Installing and → Rep. Gr.24; Air Filter; Air Filter Housing, Removing and Installing.

- Remove the screw -1- and then remove the front airbag crash sensor -2- from the lock carrier.

  WARNING

Risk of injury due to involuntary deployment.

Before handling pyrotechnic components (For example, disconnecting the connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Disconnect the connector -3-.

- To do this pull out the connector lock -2-, push down in the direction of -arrow-, and disconnect the connector -1- on the crash sensor.

Installing

  WARNING

Risk of injury due to involuntary deployment.

• Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".
• Before handling pyrotechnic components (For example, connecting a connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Attach the connector -1- to the crash sensor until it clicks into place in the direction of -arrow-.

- Push in the connector lock -2- to secure the connector.

Further installation is performed in reverse order of removal, while noting the following:

  Note

• Make sure the connectors are pushed in all the way and that they engage audibly.
• Make sure the wires are not pinched.

  WARNING

Repairing pyrotechnic components (For example the airbag and seat belt tensioner) incorrectly increases the risk of injuries due to unintentional deployments when the battery is connected.

• The ignition must be on when connecting the battery.
• Make sure that no one is inside the vehicle at the time when the battery is connected.

- Connect the battery ground cable with the ignition switched on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

  Note

If the Airbag Indicator Lamp -K75- indicates a fault, check the DTC memory, erase it and check it again using the Vehicle Diagnostic Tester.

Installation instructions: For example tightening specifications, replacing components. Refer to → Chapter "Component Location Overview - Airbag Crash Sensors".

Driver Thorax Airbag Crash Sensor -G179-/ Front Passenger Thorax Airbag Crash Sensor -G180-, Removing and Installing

Removing

  WARNING

Risk of injury due to involuntary deployment.

• Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".
• Observe the safety precautions for front thorax airbag crash sensors (pressure sensors). Refer to → Chapter "Front Thorax Airbag Crash Sensors (Pressure Sensors) Safety Precautions".

- Disconnect the battery ground cable with the ignition turned on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

- Remove the front door trim panel. Refer to → Chapter "Front Door Trim Panel, Removing and Installing".

  WARNING

Risk of injury due to involuntary deployment.

Before handling pyrotechnic components (For example, disconnecting the connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Pull out the connector lock -2- and push down in the direction of -arrow-, disconnect the connector -1- on the crash sensor.

- Release the locking mechanism by turning the crash sensor -1- counter-clockwise approximately 45º -arrows A-.

- Disengage the thorax airbag crash sensor from the door -arrow B- and remove it.

Installing

  WARNING

Risk of malfunction.

The door must be sealed properly for the crash sensor (pressure sensor) to function.

- Engage the thorax airbag crash sensor in the door.

- Turn the locking mechanism for the crash sensor clockwise.

• The tabs must engage audibly.

  WARNING

Risk of injury due to involuntary deployment.

• Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".
• Observe the safety precautions for front thorax airbag crash sensors (pressure sensors). Refer to → Chapter "Front Thorax Airbag Crash Sensors (Pressure Sensors) Safety Precautions".
• Before handling pyrotechnic components (For example, connecting a connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Attach the connector -1- to the crash sensor until it clicks into place in the direction of -arrow-.

- Push in the connector lock -2- to secure the connector.

Further installation is performed in reverse order of removal, while noting the following:

  Note

• Make sure the connectors are pushed in all the way and that they engage audibly.
• Make sure the wires are not pinched.

  WARNING

Repairing pyrotechnic components (For example the airbag and seat belt tensioner) incorrectly increases the risk of injuries due to unintentional deployments when the battery is connected.

• The ignition must be on when connecting the battery.
• Make sure that no one is inside the vehicle at the time when the battery is connected.

- Connect the battery ground cable with the ignition switched on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

  Note

If the Airbag Indicator Lamp -K75- indicates a fault, check the DTC memory, erase it and check it again using the Vehicle Diagnostic Tester.

Installation instructions: For example tightening specifications, replacing components. Refer to → Chapter "Component Location Overview - Airbag Crash Sensors".

Driver Side Rear Thorax Airbag Crash Sensor -G256-/ Passenger Side Rear Thorax Airbag Crash Sensor -G257-, Removing and Installing

Removing

  WARNING

Risk of injury due to involuntary deployment.

• Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".
• Before handling pyrotechnic components (For example, disconnecting the connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Disconnect the battery ground cable with the ignition turned on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

- Equipped on some models: Remove the fixed rear seat backrest. Refer to → Chapter "Rear Seat Backrest, Removing and Installing, Fixed Rear Seat Backrest".

- Remove the side cushion. Refer to → Chapter "Side Cushion, Removing and Installing".

- Remove the bolt -1- and the thorax airbag crash sensor -2- from the body.

  WARNING

Risk of injury due to involuntary deployment.

Before handling pyrotechnic components (For example, disconnecting the connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Disconnect the connector -3-.

- To do this pull out the connector lock -2-, push down in the direction of -arrow-, and disconnect the connector -1- on the crash sensor.

Installing

  WARNING

Risk of injury due to involuntary deployment.

• Pay attention to the safety precautions when working with pyrotechnic components. Refer to → Chapter "Safety Precautions when Working with Pyrotechnic Components".
• Before handling pyrotechnic components (For example, connecting a connector), the person handling it must "discharge static electricity". For example, this can be done by briefly touching the door striker.

- Attach the connector -1- to the crash sensor until it clicks into place in the direction of -arrow-.

- Push in the connector lock -2- to secure the connector.

Further installation is performed in reverse order of removal, while noting the following:

  Note

• Make sure the connectors are pushed in all the way and that they engage audibly.
• Make sure the wires are not pinched.

  WARNING

Repairing pyrotechnic components (For example the airbag and seat belt tensioner) incorrectly increases the risk of injuries due to unintentional deployments when the battery is connected.

• The ignition must be on when connecting the battery.
• Make sure that no one is inside the vehicle at the time when the battery is connected.

- Connect the battery ground cable with the ignition switched on. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.

  Note

If the Airbag Indicator Lamp -K75- indicates a fault, check the DTC memory, erase it and check it again using the Vehicle Diagnostic Tester.

Installation instructions: For example tightening specifications, replacing components. Refer to → Chapter "Component Location Overview - Airbag Crash Sensors".

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