Front Exhaust Pipe with Catalytic Converter Assembly Overview, Engine Codes BGQ and CBUA

Front Exhaust Pipe with Catalytic Converter Assembly Overview, Engine Codes BGP, BTK and CBTA





1 Exhaust manifold

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

2 Gasket

• Always replace.

• Note installation position:

Seal recess - arrow A - must be located at exhaust manifold recess - arrow B -.

3 Nut, 25 Nm

• Always replace.

4 Front exhaust pipe with catalytic converter

• Protect from shocks and impact stress.

• With flex joint.

• Flex joint must not be bent more than 10 degrees - otherwise it may be damaged.

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

• Install exhaust system free of stress, refer to --> [ Exhaust System, Installing ] Exhaust System, Installing.

5 Clamp

• Before tightening, ensure exhaust system is free of tension, refer to --> [ Exhaust System, Installing ] Exhaust System, Installing.

• Installed location, refer to --> [ Installed Position of Clamp ]

• Tighten the bolts evenly.

6 Nut, 25 Nm

7 Nut, 23 Nm

8 Front crossmember

9 Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130), 55 Nm

• Only use hot bolt paste (G 052 118 A3) to grease the threads; do not let the hot bolt paste (G 052 118 A3) get onto the slits of the sensor body.

10 Connector

• Brown, 4 pin.

• Installed location, refer to --> [ Installed Position Harness Connector for Oxygen Sensor ]

11 Bolt, 25 Nm

12 Suspended mount

• Replace if damaged.

Installed Position of Clamp





- Arrow - points in direction of vehicle travel.

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

- a -= 5 mm

Bolts must not project beyond the lower edge of the clamp.

Installed Position Harness Connector for Oxygen Sensor





Harness connector is located on the right on the vehicle underbody.

1. Bracket

2. Harness connector for O2S behind TWC, brown