Removing and installing main catalytic converter (right-side) — AUDI
Removing and installing main catalytic converter (right-side) on Audi: 11 steps, engines ASE, BAR. 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 A8 D3 (4E, 2002–2010)
- Renewed: seals
Don't miss
- Secure brake disc with wheel bolts.
- Renew seals, gaskets and self-locking nuts.
📋 Procedure
- Activate jacking mode Running gear, front-wheel drive and four-wheel drive43Operating the air suspension.
- Remove front right wheel. [Note: Secure brake disc with wheel bolts.]
- Vehicles with auxiliary heater: remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
- Release fasteners (1), (2) and (4) and take off noise insulation panels.
- Loosen clamp (right-side) (2).
- Unscrew nut (right arrow) at mounting bracket for main catalytic converter (right-side).
- Unbolt main catalytic converter (right-side) from front exhaust pipe (arrows).
- Detach the main catalytic converter (right-side). [Note: Renew seals, gaskets and self-locking nuts.]
- Note installation position of centre bracket (2).
- Align exhaust system so it is free of stress .
- Deactivate jacking mode Running gear, front-wheel drive and four-wheel drive43Operating the air suspension.
Other AUDI procedures
- Removing and installing turbocharger (left-side) – Audi A8 D3 · 5 torque figures
- Removing, installing and checking thermostat – Audi · 4 torque figures
- Measuring radial clearance of conrods – Audi A3 · 8 torque figures
- Aligning tailpipes · 7 torque figures
- Removing and installing toothed belt for high-pressure pump · 3 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.