TorqFix

Removing and installing digital sound package control unit 2J787, Bang & Olufsen, up to model year 2013, including vehicles with high-voltage electrical system — AUDI

Removing and installing digital sound package control unit 2J787, Bang & Olufsen, up to model year 2013, including vehicles with high-voltage electrical.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

13 steps

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

📋 Procedure

  1. Switch off ignition and all electrical equipment and remove ignition key.
  2. Remove luggage compartment back panel trim General body repairs, interior70Luggage compartment trim panels; Exploded view - luggage compartment side trim.
  3. Release and unplug connectors (3), (4) and (5) at digital sound package control unit J525(1).
  4. Fit protective cap for cable connectorVAS 6223/9(1) onto MOST bus connector (2).
  5. Unscrew bolts (2) at digital sound package control unit J525(1) and detach digital sound package control unit J525(1) from bracket.
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Release and unplug connector (2) at digital sound package control unit 2J787(1).
  2. Release and unplug connectors on TV tuner R78.
  3. Fit protective cap for cable connectorVAS 6223/9(1) onto MOST bus connector (2).
  4. Unscrew nuts (3) and (4) and detach bracket (1) with TV tuner R78 and digital sound package control unit 2J787 from luggage compartment.
  5. Remove TV tuner R78.
  6. Unscrew nuts (1) from bracket (top) (2) and detach bracket (2) from digital sound package control unit 2J787(3).
  7. Unscrew nuts (1) from bracket (bottom) (2) and detach bracket (2) from digital sound package control unit 2J787(3).
  8. Install in reverse sequence of removal.

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

The story behind TorqFix →

Workshop data on this page last updated 20 Sep 2026.