Removing and installing ATF preheater: Audi Q7

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

📋 Procedure

1. Remove transfer box Transfer box and final drives34Removing and installing transfer box.
2. If fitted, remove heat shield (1) for coolant lines from gearbox. To do so, remove bolts (arrows A).
3. Disconnect vacuum hose (1) from vacuum pipe (2) leading to brake servo.
4. Place used oil collection and extraction unitV.A.G 1782 below engine/gearbox.
5. Clamp off coolant hoses on left side of gearbox using hose clamps up to 25 mm3094.

6. Then detach hose clips from coolant pipes (A) using hose clamp pliersV.A.G 1921 or similar. Disconnect coolant hoses from coolant pipes.
7. Clamp off coolant hoses on right side of gearbox with hose clamps up to 40 mm3093 and detach coolant hoses from coolant pipes (A).
8. Pull off bleeder hose (B) from retaining clip on coolant pipe.
9. Disconnect coolant pipes (A) from gearbox (arrows).
10. Remove bolts (1) and (2) and detach ATF lines from gearbox. Catch any oil as it comes out.
11. Seal off ATF lines with suitable plugs from engine bung setVAS 6122 to keep out dirt.
12. Unbolt ATF preheater from gearbox (arrows).
13. Unplug connecter from cooling oil valve N471(1) and detach ATF preheater from gearbox together with coolant pipes.
14. Bolt ATF preheater (arrows) onto gearbox, fit coolant pipes onto gearbox and connect to coolant hoses.
15. Remove plugs and insert ATF lines into gearbox as far as stop.
16. Install ATF lines .
17. Top up coolant Engine, mechanics19.

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