Audi A4: 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.
- Release and disconnect the connectors -1- from the Digital Sound System Control Module -J525--2-.
- Insert the Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9--1- onto the MOST Bus connector -2-.
- Remove the nuts -arrows- on the bracket and remove the Digital Sound System Control Module -J525--2- with the bracket.
- Remove the bolts -arrows- and remove the Digital Sound System Control Module -J525--1- from the bracket -2-.
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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Left and Right Rear Treble Speaker -R14-/-R16-, Removing and Installing
The Left Rear Treble Speaker -R14-/Right Rear Treble Speaker
-R16--1- are inside the rear doors
at the top.
Removing and installing is identical.
Removing
- Turn off the ignition and all electr
Front Midrange Speaker, Removing and Installing
The Left Front Midrange Speaker -R103-/Right Front Midrange
Speaker -R104--1- are located in
the center of the front doors.
Removing and installing is identical.
Removing
- Turn off the ignitio
Subwoofer -R211-, Removing and Installing
Subwoofer -R211-, Removing and Installing, Sedan
The Subwoofer -R211- is located in the rear shelf.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key.
-&n
SEE MORE:
Seat Belt Height Adjuster, Removing and Installing
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior to
starting procedure.
Mandatory Replacement Parts
Bolt - Seat Belt Guide to Seat Belt Height Adjuster (Replace
bolt if it was removed because of an accident when the seat b
Boot, Removing and Installing
Special tools and workshop equipment required
Torque Wrench 1331 5-50Nm -VAG1331-
Hose Clip Pliers -VAS6362-
Hose Clip Pliers -VAG1921-
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior to
starting procedure.
Mandatory Re
