Removing Primary Catalytic Converter On Right Side

→ Let hot components cool down.

→ Wear personal protective gear.

→ Wear personal protective gear.

→ Get someone to help if necessary.

1. Primary catalytic converter on right side
2. Bottom holder on transmission housing
3. Top holder on transmission bell housing
4. Seal on flange to turbocharger
5. Bottom holder on transmission housing

Fig 1: Overview Of Catalytic Converter Components

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1. Detach engine wire harness from the bulkhead on the right side. For details, see partial work in scope → REMOVING CROSS PANEL .
   1. 1.1. Detach cowl panel cover on the right side.
   2. 1.2. Lift engine wire harness out of the bulkhead on the right side.
2. Remove electric plug-in connectors -1-  from the oxygen sensors.
   Fig 2: Pulling Off Connectors

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3. Check that the cables are routed correctly → Cable routing  !
   Fig 3: Identifying Cable Routing

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4. Unclip cable on the right cylinder bank.
5. Raise the vehicle → 4X00IN LIFTING THE VEHICLE .
6. Unclip cable at the transmission housing.
7. Pull oxygen sensor cables downwards.
   1. 7.1. Fasten the cables to a suitable cord so that you can pull them up again during installation.
   2. 7.2. Pull the cables down past the vacuum pump.
8. Loosen clamping sleeves -1-  for the exhaust pipe.
   1. 8.1. Loosen clamping screws -2-  .
   2. 8.2. Slide clamping sleeves towards the rear -arrow-  .
   Fig 4: Loosening Clamps

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9. Screw off fastening nut -1-  on the bottom holder -2-  .
   Fig 5: Identifying Mounting For Bottom Holder

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10. Unscrew fastening screw -1-  on top holder -2-  .

    Information 

    • Access to the fastening nuts between the heat shield on the all-wheel drive at the front and the turbocharger is very tight. 
    • Use a narrow tool (sockets, extensions). Use jointed sockets if necessary. 
11. Screw off fastening nuts on studs -3-  .
Fig 6: Identifying Top Holder And Screws
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12. Remove primary catalytic converter.