Renewing flexible joint: Audi A3 (CAYB, CAYC, CBAA, CBAB, …)
Step-by-step renewing flexible joint for the Audi A3: 10 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A3 (8P, 2003–2012)
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- Use welding wire, AlbronceV.A.G 1867 or welding wire, AlbronceV.A.G 1867/1 for welding work.
- Warning! Component can be damaged before installationTransport lock must not be removed until particulate filter has been fully installed. — Join both parts with 3 or more single welds, as shown in illustration (arrows).
- Warning! Component can be damaged before installationTransport lock must not be removed until particulate filter has been fully installed. — Install particulate filter .
📋 Procedure
- ⚠ When working on all parts of the exhaust system:Observe safety precautions when working on the exhaust system Safety precautions when working on the exhaust system. — Remove particulate filter .
- Cut through particulate filter at point indicated by (arrow) in illustration by applying angle grinder to weld seam for flexible joint.
- Deburr cutting point on particulate filter and clean if necessary.
- Refit particulate filter (just bring it into installation position).
- Install flexible joint with transport lock (just bring it into installation position and align it stress-free). [Note: Use welding wire, AlbronceV.A.G 1867 or welding wire, AlbronceV.A.G 1867/1 for welding work.]
- ⚠ Warning! Component can be damaged before installationTransport lock must not be removed until particulate filter has been fully installed. — Join both parts with 3 or more single welds, as shown in illustration (arrows).
- Remove flexible joint with particulate filter again.
- Arc-weld continuous seam, as shown in illustration (arrow).
- ⚠ Warning! Component can be damaged before installationTransport lock must not be removed until particulate filter has been fully installed. — Install particulate filter .
- Check exhaust system for leaks.
Other AUDI procedures
- Removing and installing high-pressure pump – VW Passat B8 · 16 torque figures
- Removing and installing ancillary bracket – VW Jetta VI · 10 torque figures
- Installing and tensioning toothed belt – VW 1.6 TDI CAYB/CAYC · 7 torque figures
- Measuring radial clearance of crankshaft · 10 torque figures
- Removing and installing sealing flange on pulley end – VW · 6 torque figures
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
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.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.