FWD

Exhaust System Component Overview





1 Turbocharger

• Removing and installing, refer to => [ Turbocharger ] Turbocharger

2 Gasket

• Replace

3 Heated Oxygen Sensor (HO2S) (G39)(before catalytic converter)

• Black harness connector

• The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body.

• When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body; hot bolt paste.

• Removing and installing, refer to => Fuel Delivery and Air Induction Fuel Delivery and Air Induction

• Tighten to 55 Nm.

4 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130)

• Brown harness connector

• The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body.

• When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body; hot bolt paste.

• Removing and installing, refer to => Fuel Delivery and Air Induction Fuel Delivery and Air Induction

• Tighten to 55 Nm.

5 Catalytic converter

• Protect from shocks and impact stress

• With front exhaust pipe, removing and installing, refer to => [ Catalytic Converter with Front Exhaust Pipe ] Catalytic Converter With Front Exhaust Pipe.

• Install exhaust system free of stress, refer to => [ Exhaust System, Aligning ] Procedures

6 Gasket

• Replace

7 25 Nm

8 Front exhaust pipe

• With flex joint

• Do not bend the decoupling element more than 10° or it could be damaged.

• Removing and installing, refer to => [ Front Exhaust Pipe ] Front Exhaust Pipe

• Install exhaust system free of stress. Refer to => [ Exhaust System, Aligning ] Procedures.

9 Front clamping sleeve

• Before tightening, align exhaust system tension-free. Refer to => [ Exhaust System, Aligning ] Procedures

• Installation position of bolt ends => [ Installed position of front clamping sleeve ]

• Tighten threaded connections evenly.

10 40 Nm

11 Spacer sleeve

12 Buffer

13 Tab

14 Washer

15 25 Nm

16 Left rear muffler

• Original equipment as one unit with center muffler. For repairs, replace each separately.

• Separating point => [ Separate the exhaust pipes at the separating
point using at a right angle. ] Service and Repair

• Replacing end pipe, refer to => [ Tail Pipe ] Tail Pipe

• Install exhaust system free of stress, refer to => [ Exhaust System, Aligning ] Procedures

17 Suspended mount

• Replace if damaged

• Check pretension, refer to => [ Exhaust System, Aligning ] Procedures

18 25 Nm

19 Right rear muffler

• Original equipment as one unit with center muffler. For repairs, replace each separately.

• Separating point => [ Separate the exhaust pipes at the separating
point using at a right angle. ] Service and Repair

• Replacing end pipe, refer to => [ Tail Pipe ] Tail Pipe

• Install exhaust system free of stress, refer to => [ Exhaust System, Aligning ] Procedures

20 40 Nm

21 Rear clamping sleeves

• For replacing the center muffler and both rear mufflers.

• Before tightening, align exhaust system tension-free, refer to => [ Exhaust System, Aligning ] Procedures

• Installed location => [ Installed position of rear double clamps ]

• Tighten threaded connections evenly.

22 Center muffler

• Original equipment as one unit with both rear mufflers. For repairs, replace each separately.

• Separating point => [ Separate the exhaust pipes at the separating
point using at a right angle. ] Service and Repair

• Install exhaust system free of stress, refer to => [ Exhaust System, Aligning ] Procedures

23 25 Nm

24 Suspended mount

• Replace if damaged

• Check pretension, refer to => [ Exhaust System, Aligning ] Procedures

25 25 Nm

26 Washer

27 Spring

28 Spacing sleeve

29 25 Nm

• Replace

30 40 Nm

• Replace

Installed position of front clamping sleeve





- When installing the double clamp, ensure that the bolt end does not project over the lower edge of double clamp.

• Bolt points to the left

Installed position of rear double clamps





- When installing the double clamps, ensure that the bolt ends do not project beyond the lower edge of the double clamp.

• Threaded connections point toward outside.