Exhaust System Overview

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 23 Nm
2. Suspended Mount
   • Replace if damaged
3. Center Muffler
   • Original equipment as one unit with rear muffler. For repairs, replace each separately.
   • Separating point: Vehicles with front-wheel drive, See figure below

     Courtesy of AUDI OF AMERICA, LLC

   • Vehicles with all-wheel drive, See figure below.

     Courtesy of AUDI OF AMERICA, LLC

   • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
4. Exhaust Manifold
   • Removing and installing, refer to LEFT EXHAUST MANIFOLD , RIGHT EXHAUST MANIFOLD 
5. Gasket
   • Replace
6. Nut
   • 23 Nm
   • Replace
7. Front Exhaust Pipe with Catalytic Converter and Front Muffler
   • For cylinder bank 2 (left)
   • With decoupling element; do not bend the decoupling element more than 10° or it may be damaged
   • Protect from shocks and impact stress
   • Removing and installing, refer to LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER 
   • Individual components of suspension, See figure below,

     Courtesy of AUDI OF AMERICA, LLC

   • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
8. Oxygen Sensor after Three Way Catalytic Converter
   • Tighten to 55 Nm.
   • 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. Refer to parts .
   • Removing and installing, refer to Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130- Bank 1 Right
9. Front Clamping Sleeves
   • Installed position, See figure below,

     Courtesy of AUDI OF AMERICA, LLC

   • Before tightening, align exhaust system so that it is tension-free, refer to EXHAUST SYSTEM, INSTALLING 
   • Tighten threaded connections evenly.
10. Nut
    • 23 Nm
11. Front Exhaust Pipe with Catalytic Converter and Front Muffler
    • For cylinder bank 1 (right)
    • With decoupling element; do not bend the decoupling element more than 10° or it may be damaged
    • Protect from shocks and impact stress
    • Removing and installing, refer to RIGHT EXHAUST PIPE WITH CATALYTIC CONVERTER 
    • Individual components of suspension, See figure below,

      Courtesy of AUDI OF AMERICA, LLC

    • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
12. Rear Muffler with Tailpipe
    • Left side of vehicle
    • Original equipment as one unit with center muffler
    • In case of repairs, center muffler end muffler and tailpipe should be replaced individually
    • Center muffler/rear muffler separating point: Vehicles with front-wheel drive, See figure below,

      Courtesy of AUDI OF AMERICA, LLC

    • Vehicles with all-wheel drive, See figure below,

      Courtesy of AUDI OF AMERICA, LLC

    • Rear muffler/tailpipe separating point, refer to TAIL PIPE 
    • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
13. Nut
    • 23 Nm
    • Replace
14. Suspended Mount
15. Nut
    • 23 Nm
16. Suspended Mount
    • Replace if damaged
17. Rear Muffler with Tailpipe
    • Right side of vehicle
    • Original equipment as one unit with center muffler
    • in case of repairs, center muffler end muffler and tailpipe should be replaced individually
    • Center muffler/rear muffler separating point: Vehicles with front-wheel drive, See figure below,

      Courtesy of AUDI OF AMERICA, LLC

    • Vehicles with all-wheel drive, See figure below.

      Courtesy of AUDI OF AMERICA, LLC

    • Rear muffler/tailpipe separating point, refer to TAIL PIPE 
    • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
18. Bracket
19. Nut
    • 23 Nm
20. Rear Clamping Sleeves
    • For individual replacement of center and rear mufflers
    • Position clamping sleeve centrally to separation point
    • Installed position, See figure below,

      Courtesy of AUDI OF AMERICA, LLC

    • Before tightening, align exhaust system so that it is tension-free, refer to EXHAUST SYSTEM, INSTALLING 
    • Tighten threaded connections evenly.

Courtesy of AUDI OF AMERICA, LLC

-- Install double clamps so that the bolt ends do not project over lower edge of double clamp.

• Threaded connections point toward the right.

Courtesy of AUDI OF AMERICA, LLC

-- Install double clamps so that the bolt ends do not project over lower edge of double clamp.

• Threaded connections point toward outside.

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
2. Washer
3. Pressure spring
4. Spacing sleeve
5. Nut - 23 Nm
6. Spacing sleeve
7. Tab
8. Adjusting buffer
9. Spacing sleeve
10. Bolt - 23 Nm

Courtesy of AUDI OF AMERICA, LLC

1. Nut - 23 Nm
2. Spacing sleeve
3. Tab
4. Adjusting buffer
5. Spacing sleeve
6. Bolt - 23 Nm
7. Bolt
8. Washer
9. Pressure spring
10. Spacing sleeve

Courtesy of AUDI OF AMERICA, LLC

1. 23 Nm
2. Bracket
3. 23 Nm
4. 23 Nm