Catalytic Converter: Service and Repair

18 32 050 Removing and installing/replacing catalytic converter (N55)







WARNING:
Risk of burning.
Only perform this repair work after the exhaust system has cooled down.







Necessary preliminary work:
- Remove front underbody protection.
- Remove stiffening plate
- Remove exhaust system.

NOTE: The oxygen sensors are in danger of being damaged when the catalytic converters are removed and installed.







Remove control sensor, cylinders 1 to 3.
Remove monitoring sensor from cylinders 1 to 3.







Release nuts (1) and (2).
Tightening torque 18 20 1AZ.







Release clamp (1).
The clamp must be renewed every time it is removed.
Tightening torque 18 31 2AZ.
In so doing, secure catalytic converter against falling out.
Feed out catalytic converter and remove.

Installation note:
Clean sealing surface. Renew clamp and gasket.







Reassemble the vehicle.
Check exhaust system for leak tightness.