Audi A4 Owners & Service Manuals

Audi A4: Overview - Sound System

The following systems are offered:

  • 8RM - Basic sound system.
  • 9VD - Standard sound system.
  • 9VS - Premium sound system, Bang & Olufsen.

8RM - Basic Sound System

  • One speaker in the left and right front doors
  • One speaker on the left and right side of the instrument panel
  • Two speakers in the left and right rear doors

8RM - Basic Sound System

1 - Information Electronics Control Module 1 -J794- in the Glove Compartment

2 - Left Front Treble Speaker -R20-/Right Front Treble Speaker -R22- in Left and Right of the Instrument Panel

3 - Left Front Bass Speaker -R21-/Right Front Bass Speaker -R23- in the Lower Front Doors

4 - Left Rear Treble Speaker -R14-/Right Rear Treble Speaker -R16- at the Top in Rear Doors

5 - Left Rear Bass Speaker -R15-/Right Rear Bass Speaker -R17- at Bottom in the Rear Doors

6 - MOST Bus

9VD - Standard Sound System

  • One speaker in the left and right front doors
  • One speaker on the left and right side of the instrument panel
  • One speaker in the instrument panel center
  • Two speakers in the left and right rear doors
  • Subwoofer -R211-

9VD - Standard Sound System

1 - Information Electronics Control Module 1 -J794- in the Glove Compartment

2 - Left Front Treble Speaker -R20-/Right Front Treble Speaker -R22- in Left and Right of the Instrument Panel

3 - Left Front Bass Speaker -R21-/Right Front Bass Speaker -R23- in the Lower Front Doors

4 - Left Rear Treble Speaker -R14-/Right Rear Treble Speaker -R16- at the Top in Rear Doors

5 - Left Rear Bass Speaker -R15-/Right Rear Bass Speaker -R17- at Bottom in the Rear Doors

6 - Center Speaker -R208- in the Instrument Panel Center

7 - Subwoofer -R11- in the Rear Shelf/Luggage Compartment

8 - MOST Bus

9VS - Premium Sound System, Bang & Olufsen

  • Two speakers in the left and right A-pillars
  • Two speakers in the left and right front doors
  • One speaker on the left and right side of the instrument panel
  • Two speakers in the center of the instrument panel
  • Two speakers in the left and right rear doors
  • Two speakers in the rear shelf/left and right D-pillar
  • Subwoofer -R211-
  • Digital Sound System Control Module -J525- in the luggage compartment on the left rear side

9VS - Premium Sound System, Bang & Olufsen

1 - Left Front Treble Speaker 2 -R220- in the Upper A-Pillar

2 - Left Front Midrange Speaker 2 -R276- in the Instrument Panel on the Left Side

3 - Left Front Bass Speaker -R21- in the Bottom of the Front Door

4 - Left Front Midrange Speaker -R103- in the Bottom Center of the Door

5 - Left Front Treble Speaker -R20- in the Upper A-Pillar

6 - Left Rear Treble Speaker -R14- in the Rear Door at Top

7 - Left Rear Bass Speaker -R15- in Bottom of the Rear Door

8 - Left Effects Speaker -R209- in the Rear Shelf/Left D-Pillar

9 - Center Speaker -R208- in the Instrument Panel Center

10 - Center Speaker 2 -R219- in the Center of the Instrument Panel

11 - Antenna -R11- in the Rear Shelf/Luggage Compartment

12 - Right Effects Speaker -R210- in the Rear Shelf/Right D-Pillar

13 - Right Rear Bass Speaker -R17- in the Bottom of the Rear Door

14 - Right Rear Treble Speaker -R16- in the Rear Door at Top

15 - Right Front Treble Speaker -R22- in the Upper A-Pillar

16 - Right Front Midrange Speaker -R104- in Center of the Front Door

17 - Right Front Bass Speaker -R23- in the Bottom of the Front Door

18 - Right Front Midrange Speaker 2 -R277- in the Right Instrument Panel

19 - Right Front Treble Speaker 2 -R221- in Upper A-Pillar

20 - Interior Microphone -R74-, Microphone Unit in Front Roof Module -R164- in the Front Interior Lamp -W1-

21 - Digital Sound System Control Module -J525- in Luggage Compartment on Left Rear Side

22 - MOST Bus

Notes on MOST Bus

The optical data bus "MOST Bus" is used in addition to the CAN Bus.

A fiber-optic cable is used. Fiber optic cables are routed inside corrugated tubes for protection.

Replace the complete fiber-optic cable if possible.

The front surface of the connectors must not be contaminated.

If disconnecting the connectors: Attach the Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9-.

When routing fiber-optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink fiber optic cables.

Repairing fiber-optic cables. Refer to → Chapter "General Repair Information".

W00-11495

    READ NEXT:

     Component Location Overview - Sound System

    Component Location Overview - Sound System, Speaker, Sedan 1 - Left Front Treble Speaker -R20-/Right Front Treble Speaker -R22-, 8RM, 9VD    - Left Front Midrange Speaker 2

     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

     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

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     Subframe, Securing

    Special tools and workshop equipment required Torque Wrench 1331 5-50Nm -VAG1331- Torque Wrench 1332 40-200Nm -VAG1332- Engine and Gearbox Jack -VAS6931- Gearbox Support -T40173- Locating Pins -T40327- Procedure - Equipped on some models: Remove the left and right diagonal brace. Refer

     Adaptive Cruise Control (ACC)

    Adaptive Cruise Control (ACC), Adjusting Special tools and workshop equipment required Vehicle Diagnostic Tester Wheel Alignment Computer Screwdriver with T-bar -VAS272001-, not illustrated Setting Device - Basic Set -VAS6430/1- or Setting Device - Basic Set -VAS6430/1A- ACC Reflector Mirror

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