Removing and installing coolant temperature sender G62 - engine codes CUKB, CXUA — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform code 85

• Special tools named: T10527/1
• Renewed: o-ring

Don't miss

• Disregard (arrows).
• Disregard (item 2).
• Place a cloth underneath to catch escaping coolant.
• If O-ring (3) with support ring (4) remains lodged in cylinder head, lift out O-ring with support ring using a piece of wire.Insert new coolant temperature sender into cylinder head immediately to avoid loss of coolant.

🔧 Engine codes this applies to

📐 45 workshop diagrams for CJZA

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

📋 Procedure

1. To relieve residual pressure in cooling system, open filler cap (arrow) on coolant expansion tank briefly and then close cap again (it should click into place).
2. Remove engine cover panel .
3. Loosen hose clips (1, 2) and remove air pipe.
4. Unplug electrical connector (1). [Note: Disregard (arrows).]
5. Press release tabs on both sides and disconnect line (2) for activated charcoal filter system.

6. Move line for activated charcoal filter system clear at air pipe.
7. Release fasteners (arrows) with release tool T10527 and T10527/1.
8. Detach air pipe (1).
9. Press release tabs on both sides and disconnect secondary air hose (arrow).
10. Remove bolts (arrow), detach connection (1) and move to one side. [Note: Disregard (item 2).]
11. Unplug electrical connector. [Note: Place a cloth underneath to catch escaping coolant.]
12. Unscrew bolt (1) and pull off coolant temperature sender G62(item 2). [Note: If O-ring (3) with support ring (4) remains lodged in cylinder head, lift out O-ring with support ring using a piece of wire.Insert new coolant temperature sender into cylinder head immediately to avoid loss of coolant.] [Note: Renew O-ring.]
13. Check coolant level .
14. Install engine cover panel .

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