Audi A4 Owners & Service Manuals

Audi A4: Backrest Adjuster, Removing and Installing

Audi A4 (B9) 2016-2024 Service Manual / Body / Body Interior / Seat Frames / 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 position.

- Turn the backrest adjustment wheel -1- until one catch is visible from behind -arrow A-. If necessary use a flashlight.

- Attach the -3399- to the catch and pry off the hand wheel in the direction of -arrow B-.

- Turn the backrest adjustment hand wheel 120º farther and repeat the process.

- Remove the backrest adjustment hand wheel.

A72-10340

Installing

Install in reverse order of removal.

Installation instructions: For example tightening specifications, replacing components. Refer to → Chapter "Overview - Seat Pan, Trim Panels".

Driver and Front Passenger Backrest Adjustment Motor -V45-/-V46-, Removing and Installing

Special tools and workshop equipment required

  • Engine/Transmission Holder - Seat Repair Fixture -VAS6136-

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.

- Remove the front seat. Refer to → Chapter "Front Seat, Removing and Installing".

- Fasten the front seat on the -VAS6136-. Refer to → Chapter "Front Seat, Mounting on Fixture for Seat Repair".

- Remove the tunnel-side seat side trim. Refer to → Chapter "Seat Side Trim on Tunnel Side, Removing and Installing".

- Remove the seat side trim on the side sill side. Refer to → Chapter "Seat Side Trim on Side Sill Side, Removing and Installing".

- Remove the backrest cover. Refer to → Chapter "Backrest Cover, Removing and Installing".

- Disengage the hooks on the backrest frame -arrows-.

A74-10600

- Disengage the hooks from the cover -arrows A-.

- Disengage the lower molding from the backrest frame -arrow B-.

A74-10628

- Disengage the hooks for the side bolsters on the backrest frame -arrows-.

A74-10622

- Mark the left and right angle position of the backrest hinge to the backrest frame with paint -arrows-.

A72-12058

- Destroy the lock washer -1- and remove it.

- Push the adjustment shaft -2- to the opposite side out of the backrest frame.

A72-12059

- Remove the bolt -arrow- and remove the backrest adjustment motor -2-.

- Disconnect the connector -1- from the removed backrest adjustment motor.

A72-12130

Installing

  WARNING

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

  • 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.
  • Follow all the instructions when installing the front seat. Refer to → Chapter "Front Seat, Removing and Installing".

- Check the left and right position of the backrest frame and hinge.

  • The backrest frame must be in the position marked on the left and right side before removal -arrows-.

- If required, adjust the position accordingly.

- First slide the adjustment shaft through the anchor (tunnel side) as far as the mount in the backrest adjustment motor.

- Check if the profile of the inserted adjustment shaft and the mount in the backrest adjustment motor to see if they align.

- For adjustment, connect an external 12-volt power source to the backrest adjustment motor and turn mount until the profiles of adjustment shaft and mount are aligned.

A72-12058

- Slide the adjuster shaft through the mount in the backrest adjustment motor -2- and slide the hinge (side sill side) until it stops.

- Tighten the bolt -arrow- for the backrest adjustment motor.

Further installation is the reverse order of removal.

Installation instructions: For example tightening specifications, replacing components. Refer to → Chapter "Overview - Front Backrest, Backrest Adjustment Motor".

A72-12130

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