Audi A4 Owners & Service Manuals

Audi A4: Front Seat, Removing and Installing

Audi A4 (B9) 2016-2024 Service Manual / Body / Body Interior / Seat Frames / Front Seat, Removing and Installing

Front Seat, Removing and Installing

Special tools and workshop equipment required

  • Universal Vehicle Protector -VAS871001-
  • Airbag Lockout Adapter -VAS6282-

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.

- Push the headrest into the lowest position.

- Move front seat -4- into the front, highest position.

- Remove the rear bolts -3 and 5- from the seat rail.

- Move the front seat all the way to the rear and then into its highest position.

- Remove the front bolts -1 and 2- from the seat rail.

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

A72-11177

  WARNING

Risk of malfunction due to electrostatic discharge.

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 connectors from the connector station in the floor. Connect the -VAS6282- to the thorax airbag connector. Refer to → Chapter "Airbag Adapter, Connecting and Disconnecting".

A72-11876

- To protect the sill panel before prying out the front seat, apply the -VAS871001- as shown.

  Note

A second technician is required to remove the front seat.

- Remove the front seat from the vehicle with a second technician.

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.

Install in reverse order of removal and note the following:

  Note

Make sure the connectors are pushed in all the way and that they engage audibly.

- Align the front seat in the vehicle and only tighten the rear bolts to the seat rails hand-tight.

- Remove the -VAS6282- and connect the connector to the connector station in the floor. Refer to → Chapter "Airbag Adapter, Connecting and Disconnecting".

  WARNING

Repairing pyrotechnic components (For example the airbag and seat belt tensioner) incorrectly increases the risk of 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.

- Tighten the bolts to the seat rails.

  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 "Overview - Front Seat".

Front Seat, Removing with Faulty Seat Forward/Back Adjustment Motor

Special tools and workshop equipment required

  • Universal Vehicle Protector -VAS871001-
  • Airbag Lockout Adapter -VAS6282-

Driver/Front Passenger Seat Forward/Back Adjustment Motor -V28-/-V31-, Checking

  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.

- Move the front seat into its highest position.

  Note

To avoid unnecessary repair costs, check electrical and electronic components and wires before removing the front seat further.

- Perform the following tests:

  • Check the fuse. Refer to → Wiring diagrams, Troubleshooting & Component locations.
  • Check the voltage at the connector station and perform fault finding if necessary. Refer to → Wiring diagrams, Troubleshooting & Component locations.
  • Check the voltage on the seat forward/back adjustment motor. Refer to → Wiring diagrams, Troubleshooting & Component locations.

- Replace the fuse if faulty. Refer to → Wiring diagrams, Troubleshooting & Component locations.

- If there is no voltage at the connector station, repair or replace the wire. Refer to → Wiring diagrams, Troubleshooting & Component locations.

- If the seat forward/back adjustment motor is faulty, replace the seat pan lower frame. Refer to → Chapter "Seat Forward/Back Adjuster, Removing and Installing, Seat Forward/Back Adjustment Motor".

Removing with faulty Driver and Front Passenger Seat Forward/Back Adjustment Motor -V28-/-V31-

  WARNING

Risk of malfunction due to electrostatic discharge.

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.

- Disconnect the connector to the connector station in the floor, connect the -VAS6282- on the thorax airbag connector. Refer to → Chapter "Airbag Adapter, Connecting and Disconnecting".

- Disconnect the connector on the seat forward/back adjustment motor.

- Remove the center seat rail cover. Refer to → Chapter "Center Seat Rail Cover, Removing and Installing".

- Remove the bolts -1 and 2- and remove the faulty seat forward/back adjustment motor -3- with the bracket.

- Remove the accessible bolts for the seat rails.

- Push the front seat forward and back and remove the accessible bolts for the seat rails.

A72-12023

- To protect the sill panel before prying out the front seat, apply the -VAS871001- as shown.

A72-11876

  Note

A second technician is required to remove the front seat.

- Remove the front seat from the vehicle with a second technician.

- Replace the seat pan lower frame together with seat forward/back adjustment motor. Refer to → Chapter "Seat Forward/Back Adjuster, Removing and Installing, Seat Forward/Back Adjustment Motor".

    READ NEXT:

     Airbag Adapter, Connecting and Disconnecting

    Special tools and workshop equipment required Airbag Lockout Adapter -VAS6282- Airbag Connector, Disconnecting - Move the front seat all the way to the rear and then into its highest position

     Seat Forward/Back Adjuster, Removing and Installing

    Seat Forward/Back Adjuster, Removing and Installing, Seat Forward/Back Adjustment Handle Removing - Unscrew the front seat and tip to the rear with the wires attached. Refer to → Chapte

     Backrest Adjuster, Removing and Installing

    Backrest Adjustment Hand Wheel, Removing and Installing Special tools and workshop equipment required Assembly Tool -3399- Removing - Move the front seat all the way forward into its highest

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