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Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AUDI

Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC on Audi: 12 steps, engines AFB, AKE, AKN, AYM.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

12 steps 9 engine codes

🧭 Before you start

Fits: Audi A6 C5 (4B)

  • Renewed: gaskets

Don't miss

  • Secure brake disc with wheel bolts.
  • Illustration shows vehicle from model year 2002 onwards.
  • Illustration shows vehicle with manual gearbox.
  • Renew gaskets and self-locking nuts.

🔧 Engine codes this applies to

AFBAKEAKNAYMBAUBCZBDGBDHBFC

📐 60 workshop diagrams for AFB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 1
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 2
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 3
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 4
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 5
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 6
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 7
Removing and installing starter catalytic converter - engine code letters AKE, AYM, BAU, BCZ, BDG, BDH, BFC — AFB · diagram 8
+ 52 more diagrams
🔒 60 workshop diagrams for this job Ask about your Audi AFB — free or sign up free to see the drawings

📋 Procedure

  1. Remove front left wheel. [Note: Secure brake disc with wheel bolts.]
  2. On vehicles with auxiliary/additional heater, remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
  3. Release fasteners (1 … 5) and take off front and rear noise insulation. [Note: Illustration shows vehicle from model year 2002 onwards.]
  4. Remove bolt (2) from noise insulation cover above drive shaft (left-side).
  5. Disengage hook (1) and detach noise insulation.
AFB? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Unbolt heat shield (1) for drive shaft (left-side).
  2. Unbolt front exhaust pipe from starter catalytic converter (1).
  3. Unscrew nut (arrow) at bracket for front exhaust pipe. [Note: Illustration shows vehicle with manual gearbox.]
  4. Remove engine cover panel; to do so, remove air cleaner cover and lift off engine cover panel.
  5. Remove heat shield above turbocharger (arrows).
  6. Unscrew nuts (1) and remove starter catalytic converter. [Note: Renew gaskets and self-locking nuts.]
  7. Align the exhaust system free of stress .
Workshop diagrams

Ask TorqFix about your Audi AFB — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your Audi AFB — free → or sign up free to see the drawings

Other AUDI procedures

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

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Workshop data on this page last updated 20 Sep 2026.