Removing and installing knock sensor: Audi A8 D4 (CABA, CABB, CABD, CADA, …)
Step-by-step removing and installing knock sensor for the Audi A8 D4: 13 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 D4 (4H, 2010–2017)
Don't miss
- The tightening torque influences the function of the knock sensor.
🔧 Engine codes this applies to
📋 Procedure
- Remove alternator Electrical system27Alternator; Removing and installing alternator.
- Unplug electrical connector (1).
- Unscrew bolt (2) and remove knock sensor 1G61.
- Unplug electrical connectors (1 and 2).
- Remove fuel rails (left and right) Removing and installing injectors.
- Unscrew bolt and remove relevant knock sensor:
- Remove front wheel housing liner (left-side) completely General body repairs, exterior66Wheel housing liner; Removing and installing front wheel housing liner.
- Remove bolts (arrows) and detach heat shield for drive shaft (left-side).
- Unbolt drive shaft (left-side) from gearbox flange shaft Running gear, axles, steering40Drive shaft; Removing and installing drive shaft.
- Cut through cable tie and remove heat insulation sleeve (1).
- Unplug electrical connector (3).
- Unscrew bolt (2) and remove knock sensor 4G199. [Note: The tightening torque influences the function of the knock sensor.]
- Install alternator Electrical system27Alternator; Removing and installing alternator.
Other AUDI procedures
- Removing and installing cylinder head (2.0 ltr. engine without assembly clearance feature)
- Removing and installing fuel tank with attached components - USA vehicles with front-wheel drive/four-wheel drive
- Removing and installing air cleaner housing – Audi A6 C5 · 1 torque figures
- Removing and installing fuel delivery unit - A5 from model year 2012 onwards, A4 from model year 2013 onwards, rest-of-world vehicles with four-wheel drive, USA vehicles with front-wheel drive/four-wheel drive
- Removing and installing fuel gauge sender 2G169 - A5 from model year 2012 onwards, A4 from model year 2013 onwards, rest-of-world vehicles with four-wheel drive, USA vehicles with front-wheel drive/four-wheel drive
- 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
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.