Removing and installing coolant pipes (left-side) for high-voltage cooling system - engine codes CUKB, CXUA — AUDI

🧭 Before you start

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

• Opens: coolant

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• For illustration purposes, the installation position is shown with the high-voltage components removed.
• For illustration purposes, the installation position is shown with the lock carrier removed.
• High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock.The high-voltage system must be re-energised by a "“high-voltage technician”". — Re-energise high-voltage system .

🔧 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. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock.The high-voltage system must be de-energised by a "“high-voltage technician”".Work on the de-energised high-voltage system may only be performed by an "“electrically instructed person”". — De-energise high-voltage system .
2. Remove engine cover panel .
3. Drain coolant for high-voltage cooling circuit .
4. Remove mounting for high-voltage battery charging unit .
5. Unplug electrical connector (3).

6. Release hose clips (1) and disconnect coolant hoses.
7. Release fastener (2) with a small screwdriver and disengage coolant expansion tank from bracket.
8. Remove nuts (2) and detach bracket (1).
9. Remove bolt (3).
10. Lift retaining clip (1), release hose clip (2) and disconnect coolant hoses. [Note: For illustration purposes, the installation position is shown with the high-voltage components removed.]
11. Release hose clips (2, 3) and disconnect coolant hoses.
12. Remove bolt (1).
13. Move clear coolant pipes (left-side) for high-voltage cooling system and detach. [Note: For illustration purposes, the installation position is shown with the lock carrier removed.] [Note: Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
14. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock.The high-voltage system must be re-energised by a "“high-voltage technician”". — Re-energise high-voltage system .
15. Check coolant level .

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