Removing and installing auxiliary radiator: Audi A3 (BHT, BSB, BTE, CAEB, …)

🧭 Before you start

Remove the front wheel, wheel spoiler and bumper-cover mounting, then fold the front of the wheel housing liner back. Mask the bumper and wing, clamp off and disconnect the coolant hoses over a drip tray, slacken the nuts and lift the radiator off its studs; the right-side unit swivels out and its air duct comes off separately. Refit in reverse with correct hose clips and fill with new coolant.

Fits: Audi A3 (8V, 2012–2020)

• Opens: coolant
• Special tools named: VAS 5014

Don't miss

• Mask the bumper cover and wing before working in the gap; the radiator edges mark paint easily.
• Clamp off the coolant hoses before releasing the clips to keep coolant loss down.
• Some nuts are only loosened, not removed; the radiator lifts forwards off the studs.
• Secure every hose with the original type of hose clip, and do not reuse the drained coolant.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📋 Procedure

1. Remove front wheel Running gear, axles, steering44Wheels, tyres.
2. Remove wheel spoiler (front) General body repairs, exterior66Wheel housing liners; Removing and installing wheel housing liner (front).
3. Remove mounting for bumper cover General body repairs, exterior50Wing; Exploded view - wing.
4. Unfasten front section of wheel housing liner and push it towards rear General body repairs, exterior66Wheel housing liners; Removing and installing wheel housing liner (front).
5. To prevent paintwork damage, mask bumper cover (1) and wing (2), as shown in illustration.

6. Move electrical wiring harness (3) clear and move coolant hose clear at clip (4).
7. Place coolant collecting system VAS 5014 or drip tray for workshop hoistVAS 6208 underneath.
8. Clamp off coolant hoses using hose clamps, up to 25 mm3094, release hose clips (1 and 2) and disconnect hoses.
9. Loosen nuts (arrows) several turns.
10. Pull auxiliary radiator (left-side) (1) forwards off studs, and detach towards rear.
11. Move clear electrical wiring harness (2).
12. Place coolant collecting system VAS 5014 or drip tray for workshop hoistVAS 6208 underneath.
13. Clamp off coolant hoses using hose clamps up to 25 mm3094, release hose clips (arrows) and disconnect hoses.
14. Move coolant hose clear.
15. Remove nuts (1, 3) and bolt (4).
16. Swivel bottom of auxiliary radiator (right-side) towards rear, then swivel top towards front to release it from studs. Detach auxiliary radiator (right-side).
17. Detach air duct from auxiliary radiator.
18. Remove nuts (1).
19. Loosen nuts (3) (do not remove).
20. Detach retaining bracket (2) and auxiliary radiator (4). [Note: Secure all hose connections with correct type of hose clips (as original equipment) Electronic parts catalogue.Do not reuse coolant.]
21. Fill up with coolant .

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