Removing and installing knock sensor 2G66: Audi A1 (CDLH, CEUA, CEUC, CEUD, …)

🧭 Before you start

Fits: Audi A1 (8X, 2010–2018)

• Opens: coolant, engine oil
• Renewed: gaskets

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• Renew gaskets and seals.Secure all hose connections with clips (as original equipment) Parts catalogue.

🔧 Engine codes this applies to

📐 41 workshop diagrams for CDLH

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove radiator cowl Engine, mechanics19Removing and installing radiator cowl.
2. Drain cooling system Engine, mechanics19Draining and filling cooling system.
3. Draining oil filter housing Engine, mechanics17Draining oil filter housing.
4. Use assembly tool T10118 to release electrical connector (arrow) at oil pressure switch F1 and knock sensor 2G66 and unplug.
5. Place drip tray for workshop hoistVAS 6208 beneath engine.

6. Detach coolant hose (1).
7. Unscrew bolts (arrows) and detach engine oil cooler.
8. Press release tabs and disconnect crankcase breather pipe (1).
9. Unscrew bolts (arrows) and remove oil filter bracket.
10. Knock sensor 2G66 is located behind oil filter bracket (1).
11. Unscrew bolt (arrow) and remove knock sensor 2G66(2). [Note: Renew gaskets and seals.Secure all hose connections with clips (as original equipment) Parts catalogue.]
12. Insert baffle plate (1) into cylinder block, as shown in illustration.

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