Removing and installing electronics box (plenum chamber) — AUDI
Removing and installing electronics box (plenum chamber) on Audi: 32 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A8 D3 (4E, 2002–2010)
Don't miss
- Protective cap prevents contamination of or mechanical damage to end face of fibre optic cable which would impair light transmission.
- Cover air duct at air conditioner housing with clean cloth to stop anything falling in.
- Refit all cable ties at the same locations when reinstalling.
📋 Procedure
- With ignition switched off, disconnect earth cable at battery .
- Remove glove box 68.
- Fold back floor covering.
- Unscrew bolts (arrows) and detach control unit for front display and information control panel J523.
- Unplug electrical connectors (1) and (3).
- Unplug connector (2) for fibre optic cable.
- Seal open connector plug (2) of fibre optic cable with protective cap for cable connectorVAS 6223/9(item 1). [Note: Protective cap prevents contamination of or mechanical damage to end face of fibre optic cable which would impair light transmission.]
- Release retaining clips (arrows) and detach adaptive suspension control unit J197.
- Unplug electrical connectors.
- Detach insulating mat behind adaptive suspension control unit J197.
- Unscrew nuts (arrows) and detach cover.
- Unscrew nuts (arrows).
- Pull off rubber seal (1) for plenum chamber covers.
- Detach plenum chamber covers (2) and (3).
- Remove dust and pollen filter 87. [Note: Cover air duct at air conditioner housing with clean cloth to stop anything falling in.]
- Remove wiper arms .
- Unscrew bolts (arrows) for cowl panel trim (1) (left and right).
- ⚠ Risk of damage to cowl panel trim.Apply a small quantity of soap solution to transition between windscreen and cowl panel trim (1). Then, starting at edge of windscreen, pull cowl panel trim vertically up and out of retainer at windscreen. — Carefully pull cowl panel trim off retainer at windscreen.
- Unscrew bolts (arrows).
- Detach both retainers and engine control unit from electronics box (plenum chamber).
- Move engine control unit to side with connectors attached.
- Turn air quality sensor G238(item 1) 90° in anti-clockwise direction and take sensor out of mounting.
- Release retaining clips (arrows).
- Slightly open cover for electronics box (plenum chamber) and pull off to front.
- Unplug electrical multi-pin connectors (1).
- Release fasteners (arrows) and lift off auxiliary relay carrier in electronics box.
- Disengage engine wiring harness at electronics box and move clear.
- Unbolt and lift off electronics box.
- Unclip plug-in sockets for electrical multi-pin connectors. [Note: Refit all cable ties at the same locations when reinstalling.]
- Install glove box 68.
- Connect battery. Steps required .
- Adjust wiper arms .
Other AUDI procedures
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.