Audi A4 Owners & Service Manuals

Audi A4: Control Module/Digital Sound System Amplifier, Removing and Installing

Audi A4 (B9) 2016-2024 Service Manual / Electrical System / Communication / Sound System / Control Module/Digital Sound System Amplifier, Removing and Installing

Special tools and workshop equipment required

  • Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9-.

The Digital Sound System Control Module -J525--1- is located behind the left luggage compartment side trim panel.

  Note

If replacing the control module, select the "Replace control module" function for the corresponding control module on the Vehicle Diagnostic Tester.

Removing

- Turn off the ignition and all electrical equipment and remove the ignition key.

- Open the left storage compartment in the luggage compartment.

The bracket with the Digital Sound System Control Module -J525- must be removed first.

A91-12477

- Release and disconnect the connectors -1- from the Digital Sound System Control Module -J525--2-.

A91-12478

- Insert the Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9--1- onto the MOST Bus connector -2-.

A97-0760

- Remove the nuts -arrows- on the bracket and remove the Digital Sound System Control Module -J525--2- with the bracket.

A91-12478

- Remove the bolts -arrows- and remove the Digital Sound System Control Module -J525--1- from the bracket -2-.

A91-12479

Installing

- Install in reverse order of removal. Note the following:

Tightening Specifications

  • Refer to → Chapter "Component Location Overview - Sound System, Speaker, Sedan"
  • Refer to → Chapter "Component Location Overview - Sound System, Speaker, Avant"

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