Exhaust system, component overview: Notes

1 - 23 Nm

2 - Suspended mount

• Replace if damaged

3 - 25 Nm

• Replace
• Tighten evenly in several stages

4 - Exhaust manifold

• For cylinder bank 1 (right)
• Removing and installing → Right exhaust manifold, removing and installing 

5 - Heated Oxygen Sensor (HO2S) G39 (before catalytic converter)

• For cylinder bank 1 (right)
• 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 previous oxygen sensor, grease threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Hot bolt paste
• Removing and installing → 24 - MULTIPORT FUEL INJECTION (MFI)

• Tighten to 55 Nm

6 - 25 Nm

• Replace
• Tighten evenly in several stages

7 - Exhaust manifold

• Cylinder bank 2 (left)
• Removing and installing → Left exhaust manifold, removing and installing 

8 - Heated Oxygen Sensor (HO2S) 2 G108 (in front of catalytic converter)

• For cylinder bank 2 (left)
• 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 previous 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 → 24 - MULTIPORT FUEL INJECTION (MFI)

• Tighten to 55 Nm

9 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G131

• For cylinder bank 2 (left)
• 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 previous oxygen sensor, grease threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Hot bolt paste
• Removing and installing → 24 - MULTIPORT FUEL INJECTION (MFI)

• Tighten to 55 Nm

10 - Front exhaust pipe with pre- and main catalytic converters

• For left side of vehicle
• With flex joint
• Decoupling element must not be bent more than 10 ° otherwise it may be damaged
• Protect from shocks and impact stress

• Removing and installing → Left front exhaust pipe with primary and main catalytic converter, removing and installing 
• Individual components of suspension Individual suspension components, left side 
• Install exhaust system free of stress → Exhaust system, installing free of tension 

11 - Front clamping sleeve

• Installed location Installed position of front double clamps 
• Before tightening, align exhaust system tension-free → Exhaust system, installing free of tension 
• Tighten threaded connections evenly.

12 - 23 Nm

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

• For cylinder bank 1 (right)
• 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 previous 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 → 24 - MULTIPORT FUEL INJECTION (MFI)

• Tighten to 55 Nm

14 - Front exhaust pipe with pre- and main catalytic converters

• For right side of vehicle
• With flex joint
• Decoupling element must not be bent more than 10 ° otherwise it may be damaged
• Protect from shocks and impact stress

• Removing and installing → Right front exhaust pipe with primary and main catalytic converter, removing and installing 
• Individual components of suspension Individual components of suspension, right side 
• Install exhaust system free of stress → Exhaust system, installing free of tension 

15 - Rear muffler

• For left side of vehicle
• Original equipment as one unit with center muffler. For repairs, replace each separately.
• Separating point → Figure
• With exhaust flap - checking exhaust flap → Exhaust flap, checking 

• Install exhaust system free of stress → Exhaust system, installing free of tension 

16 - Suspended mount

• Replace if damaged

17 - 23 Nm

18 - Brace

19 - Rear muffler

• For right side of vehicle
• Original equipment as one unit with center muffler. For repairs, replace each separately.
• Separating point → Figure
• With exhaust flap - checking exhaust flap → Exhaust flap, checking 

• Install exhaust system free of stress → Exhaust system, installing free of tension 

20 - 23 Nm

21 - 23 Nm

22 - Rear clamping sleeve

• For individual replacement of center and rear mufflers
• Installed location Installed position of rear double clamps 
• Before tightening, align exhaust system tension-free → Exhaust system, installing free of tension 
• Tighten threaded connections evenly.

23 - Center muffler

• Original equipment as one unit with rear muffler. For repairs, replace each separately.
• Separating point → Figure
• Install exhaust system free of stress → Exhaust system, installing free of tension