18 32 050 Removing and installing/replace catalytic converter for cylinders 1-3 (N54, N54T)
Special tools required:
WARNING:
Risk of burning!
This repair work may only be carried out on an exhaust system which has cooled down.
This repair work may only be carried out on an exhaust system which has cooled down.
Necessary preliminary tasks:
- Remove underbody protection . See 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION and 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION
- Remove EXHAUST SYSTEM .
- Remove cable clip on side of transmission for control sensor/monitoring sensor.
- All-wheel drive vehicles only: Remove RIGHT BEARING SUPPORT .
NOTE:
The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.
Remove MONITORING SENSOR FROM CYLINDERS 1 TO 3 .
Remove CONTROL SENSOR, CYLINDERS 1 TO 3 .
Unscrew nuts.
Tightening torque: 18 20 2AZ .
Release screws.
Tightening torque:23 00 2AZ .
Remove holder (1).
Unfasten clamp. In so doing, secure catalytic converter (1) against falling out.
Feed out catalytic converter (1) towards bottom and remove.
Installation note:
Clean sealing surface. Replace seal and clamp.
Tightening torque: 18 31 3AZ .
Installation note:
Secure installation position of catalytic converter with special tool: 18 0 110 .
Reassemble the vehicle.
Check exhaust system for leaks.