Removing and installing ATF filter housing: Audi A6/A7 C7
Step-by-step removing and installing ATF filter housing for the Audi A6/A7 C7: 12 steps. What to remove, in what order, and what to check after.
The ATF filter housing on the Audi A6/A7 (4G, C7) and the related 4X platform bolts to the side of the gearbox together with the ATF hoses to the cooler. Access is from below: the rear noise insulation, any heat shield and the side cover on the gearbox come off. The ATF is drained into a collection unit, the hoses unbolted and the open lines plugged with clean bungs, then the housing is unbolted. The leak risk lives in the seals: every seal on the oil lines and filter housing is renewed and coated with ATF, sealing faces must be clean, and the pipes are pushed into the housing by hand until they engage before anything is bolted. Then it is refilled with ATF.
🧭 Before you start
Remove the rear noise insulation, heat shield if fitted and gearbox side cover. Drain the ATF, detach and plug the hoses and unbolt the filter housing. Fit the ATF pipes with new seals, renew the housing seal, press pipes and hoses on by hand until they engage, bolt up and fill with ATF.
Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X
- Opens: gearbox oil
- Renewed: seals
Don't miss
- Renew all seals on the oil lines and filter housing and coat them with ATF.
- Make sure the sealing surfaces are clean before assembly.
- Press pipes and hoses on by hand until they engage, then bolt them.
- Plug open lines with clean bungs while the housing is off.
- Fill up with ATF after installation.
Written for this job from the workshop steps below · TorqFix editorial.
📋 Procedure
- Remove rear noise insulation (2)General body repairs, exterior66Noise insulation; Removing and installing noise insulation.
- If fitted, remove nuts (1) and bolt (2) and detach heat shield.
- Remove bolts (arrows) and detach cover (1) at side of gearbox.
- Place used oil collection and extraction unitVAS 6622A below connections.
- Drain ATF .
- Remove bolts (arrows) and detach ATF hoses.
- Seal off open lines and connections with clean plugs from engine bung setVAS 6122.
- Remove bolts (arrows) and detach filter housing.
- ⚠ Risk of leaks!Always renew seals on oil lines and filter housing and coat new seals with ATF.Ensure that sealing surfaces are clean. — Pull ATF fluid pipes (2) out of filter housing (1) and press in as far as stop with new seals (3).
- Renew seal (4).
- First press ATF pipes/hoses onto filter housing and cooler by hand until they engage, then bolt on.
- Fill up with ATF .
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.