Audi RS5 ancil belt removal — AUDI
Audi RS5 ancil belt removal on Audi: 13 steps, engines CAUA, CFSA. What to remove, in what order, and what to check after.
The title gives this as the ancillary belt on the Audi RS5 with the 4.2 FSI V8, with the S5 4.2 V8 also covered, engine codes CAUA and CFSA. The source steps are sparse: they name the alternator drive pulley, the vibration damper and the tensioner pulley as the points involved, and set out removal followed by an installation sequence. In practice that means releasing the tensioner to take the belt off, then routing the new or reused belt around the pulleys in the specified order before letting the tensioner take up. The two things that matter are checking the direction-of-travel marking if a used belt goes back on, and confirming the belt sits correctly in every pulley groove before the engine lower cover is refitted and the engine is started.
🧭 Before you start
Remove the engine lower cover and the ancillary drive belt by working the tensioner. Refit following the installation sequence over the alternator drive pulley, vibration damper and tensioner pulley. Check tensioner and belt seating, refit the lower cover and start the engine to confirm the belt runs true.
Fits: platform codes RS5, 4.2, FSI, |, S5, (4.2, V8, FSI)
Don't miss
- If reusing the belt, check the direction of travel matches the marking.
- Follow the installation sequence over the alternator pulley, damper and tensioner pulley.
- Check the tensioner and belt are seated correctly before refitting the lower cover.
- Run the engine briefly and watch the belt track; standard practice after any belt refit.
Written for this job from the workshop steps below · TorqFix editorial.
📋 Procedure
- Note: Check that the direction of travel is as marked
- Installation sequence:
- Alternator drive pulley:
- Remove the ancillary drive belt
- Vibration damper:
- Tensioner pulley:
- Check the tensioner and/or the belt for correct fitting
- Refit the engine lower cover
- Start the engine
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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.