Catalytic Converter: Service and Repair

Front Exhaust Pipe with Catalytic Converter Assembly Overview

• The components illustrated correspond to cylinder bank 1. They are a mirror image of the components for cylinder bank 2.





1 Turbocharger

• Turbocharger assembly overview, refer to --> [ Turbocharger Assembly Overview ] Turbocharger Assembly Overview.

2 Gasket

• Replace.

3 25 Nm

4 25 Nm

5 Connector

• For Heated Oxygen Sensor (HO2S) and Oxygen Sensor (O2S) heater

Cylinder bank 1:

• Black connector

Cylinder bank 2:

• Brown connector

6 Heated oxygen sensor, 50 Nm

• Can only be replaced with the engine removed, refer to --> [ Engine, Removing ] Engine Removing.

• Grease threads only with hot bolt paste (G 052 112 A3) (anti-seize compound). Hot bolt paste (G 052 112 A3) must not get into slots on sensor body.

• To remove, use open end wrench for oxygen sensor (3337)

Cylinder bank 1:

• Oxygen sensor (G39).

Cylinder bank 2:

• HO2S 2 (G108).

7 Front exhaust pipe with catalytic converter

• Can only be replaced with the engine removed, refer to --> [ Engine, Removing ] Engine Removing.

8 Catalytic converter

9 Suspended mount

10 Bracket