Servicing central locking system: Audi A8 D3
Step-by-step servicing central locking system for the Audi A8 D3: 10 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)
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- On vehicles equipped with "“Advanced key”", the vehicle must be locked separately using the remote control after leaving the vehicle in order to activate the SAFE function.
📋 Procedure
- The A8 central locking system is now electrical, as opposed to pneumatic.
- The positioners in the doors are integrated in the lock and have 2 motors.
- The positioners cannot be renewed separately.
- First motor locks door, whereas second motor locks interior door handle (SAFE function).
- The locked doors can no longer be opened from inside the car.
- On vehicles equipped with "“Advanced key”", the vehicle must be locked separately using the remote control after leaving the vehicle in order to activate the SAFE function.
- Alternatively, the SAFE function can be activated via buttons in the door handles.
- The positioners for the tank flap and rear lid have one electric motor each and can be renewed separately.
- After an accident involving activation of the airbags, the central locking control unit will unlock any doors which are locked.
- Central locking system control unit is located in rear right side panel.
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, installing and checking coolant thermostat – Audi · 1 torque figures
- Modifying gearbox support 3221
- Installing, tensioning – Audi 2.5 TDI · 4 torque figures
- Removing gearbox, vehicles as of model year 2011 with front-wheel drive
- Removing and installing toothed belt, vehicles ► 12.05
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.