Removing and installing entry and start authorisation button E408 or driver identification control unit J589 — AUDI
Removing and installing entry and start authorisation button E408 or driver identification control unit J589 on Audi: 11 steps.
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)
- Timing position: the crankshaft or camshaft is set and locked during this job
- Special tools named: locking pin
📋 Procedure
- If control unit is to be renewed, select the "“Replace control unit”" function for appropriate control unit in .
- Continue to follow the instructions on the display of the vehicle diagnostic tester.
- Switch off ignition and take out ignition key.
- Press button (arrow) and take out front ashtray insert (1).
- Unscrew bolt (arrow) and remove front ashtray housing.
- Unplug electrical connector.
- Lift off switch trim for centre console (arrows).
- Unplug electrical connectors.
- Remove bolt (3).
- If fitted, pull out locking pin (1)(arrow).
- Detach entry and start authorisation button E408 / driver identification control unit J589(item 2).
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
- Allocation of gearbox to engine
- Renewing needle bearing for spur gear 2 – Audi A6 C5 / A8 D2
- Removing and installing charge air cooler – Audi A6 C5
- Removing and installing intake manifold (right-side) – Audi
- Removing and installing front exhaust pipe with catalytic converter
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.