Removing and installing electronics box: Audi A4 B8
Step-by-step removing and installing electronics box for the Audi A4 B8: 21 steps, 2 torque figures. What to remove, what to tighten and to how many Nm.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A4 B8 (8K, 2007–2015)
- Opens: brake fluid
Don't miss
- Disregard (item 1).
- Unplug electrical connector (1) for brake fluid level warning contact F34
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 4 Nm (3.0 lb-ft) | Tighten M5 securing nuts (1) |
| 6 Nm (4.4 lb-ft) | Tighten M6 securing nuts (1) |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- With ignition switched off, disconnect earth cable at battery .
- Remove filler neck for washer fluid reservoir .
- Remove wiper motor .
- Remove bolts (arrows) and detach cover for engine compartment electronics box. [Note: Disregard (item 1).]
- Release catches (arrows A) and remove engine control unit (arrow B).
- Unplug electrical connector (2) if fitted.
- Unplug electrical connectors (4) and unfasten electrical wire (3) at front and rear.
- Release catches (arrow) and detach fuse holder B (item 1).
- Disengage engine wiring harness at electronics box and move clear.
- If fitted, remove alarm horn H12 and move wiring harness clear.
- Remove bolts (arrows).
- Unplug electrical connector (1) for brake fluid level warning contact F34
- Lift engine compartment electronics box (3) and unplug electrical connector (2) for clutch position sender G476.
- Disengage engine wiring harness (1) at electronics box.
- Release retaining clips (2) and (5) and press retaining frame (3) for engine control units as far as possible towards passenger compartment.
- Take out engine compartment electronics box (4).
- Install fuse holder B .
- Install alarm horn H12.
- Connect battery. Steps required .
- Install wiper motor .
- Install filler neck for washer fluid reservoir .
Other AUDI procedures
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
- Removing and installing operating and display unit -E87
- Checking air conditioner refrigeration capacity
- Removing and installing air conditioner (complete)
- Removing and installing power-assisted steering box for LHD vehicles with V8 TDI engine
- Testing cooling capacity of air conditioner
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.