Engine Code CBUA

Front Exhaust Pipe with Catalytic Converter Overview






1 Exhaust Manifold

• Coat the stud bolts with hot bolt paste (G 052 118 A3).

2 Gasket

• Always replace.

• Note the installed position:

The gasket recess - arrow A - must be located at the exhaust manifold recess - arrow B -.

3 Connector

• Black, 4 pin

4 Oxygen Sensor in Bank 1 Center Three Way Catalytic Converter (G465)

• 55 Nm

• Use the ring spanner 7-piece set (3337) for removal and installation.

• The threads of new oxygen sensors are coated with assembly paste.

• When reusing an old oxygen sensor again, only use hot bolt paste (G 052 112 A3) to grease the threads, do not let the paste get onto the slits of the oxygen sensor body.

• If the sealing ring is leaking cut if off and replace it.

5 Spring Nut

• Insert from the front.

6 Clamp

• Before tightening, ensure the exhaust system is free of tension. Refer to => [ Exhaust System, Installing ] Exhaust System, Installing.

• Installed position, refer to => [ Installed Position of Clamp ].

• Tighten the nuts evenly.

7 Nut

• 23 Nm

8 Nut

• 20 Nm

9 Oxygen Sensor after Three Way Catalytic Converter (G130)

• 55 Nm

• Use the ring spanner 7-piece set (3337) for removal and installation.

• The threads of new oxygen sensors are coated with assembly paste.

• When reusing an old oxygen sensor again, only use hot bolt paste (G 052 112 A3) to grease the threads, do not let the paste get onto the slits of the oxygen sensor body.

• If the sealing ring is leaking cut it off and replace it.

10 Connector

• Brown, 4 pin

• Installed position, refer to => [ Harness Connector for Oxygen Sensors - Installed Position ].

11 Front Tunnel Bridge

12 Bolt

• 5 Nm

13 Heat Shield

• For the catalytic converter.

14 Bolt

• 23 Nm

15 Suspended Mount

• Replace if damaged.

16 Bolt

• 10 Nm

17 Front Exhaust Pipe with Catalytic Converter

• Protect from shocks and impact stress.

• With a coupling element.

• Do not bend the coupling element more than 10° - otherwise it may get damaged.

• Removing and installing, refer to => [ Front Exhaust Pipe with Catalytic Converter ] Front Exhaust Pipe with Catalytic Converter.

• Installing the exhaust system free of tension, refer to => [ Exhaust System, Installing ] Exhaust System, Installing.

18 Nut

• 23 Nm

• Replace

Installed Position of Clamp





The - arrow - points in the direction of travel.

- Align the clamp - 1 - to the mark on the catalytic converter - 2 -.

- a - = 5 mm

The bolts must be on the right side. They must not project beyond the lower edge of the clamp.

Harness Connector for Oxygen Sensors - Installed Position





The connectors are located to the right, on the vehicle floor under the cover.

1. Harness connector for the oxygen sensor after three way catalytic converter

2. Bracket

3. Harness connector for oxygen sensor in bank 1 center three way catalytic converter