Overview - Muffler

Fig 1: Exploded View Of Muffler

Courtesy of AUDI OF AMERICA, LLC

1. Rear Muffler
   • Original equipment one unit with the center muffler. If a repair is required replace each separately
   • Separating point. Refer to EXHAUST PIPES/MUFFLERS, DISCONNECTING .
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
2. Bolt
   • 23 Nm
3. Mount
   • Replace if damaged
   • Replace the red mount after removing
   • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
4. Center Muffler
   • Original equipment as one unit with rear mufflers. If a repair is required replace each separately
   • Separating point. Refer to EXHAUST PIPES/MUFFLERS, DISCONNECTING .
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
5. Bolt
   • 23 Nm
6. Bracket
7. Retaining Loop
   • Replace if damaged
   • Replace the red retaining loop after removing
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
8. Front Muffler
   • There are different versions.
   • With coupling:
     • Do not bend more than 10°
     • Do not load on cable
     • Do not damage wire mesh at decoupling element
   • Removing and Installing. Refer to FRONT MUFFLER, REMOVING AND INSTALLING .
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
   • Threaded Connection. Refer to Fig 2.
9. Seal
   • Always replace after removing.
10. Mount
    • Replace if damaged
    • Replace the red mount after removing
    • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
11. Bolt
    • 23 Nm
12. Front Clamping Sleeve
    • Tighten the threaded connections equally to 23 Nm.
    • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Installation position. Refer to Fig 4.
13. Retaining Loop
    • Replace if damaged
    • Replace the red retaining loop after removing
    • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
14. Rear Clamping Sleeve
    • Tighten the threaded connections equally to 23 Nm.
    • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Installation position. Refer to Fig 5.
15. Mount
    • Replace if damaged
    • Replace the red mount after removing
    • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
16. Bolt
    • 23 Nm

Threaded Connection - Front Muffler, Vehicle without Particulate Filter 

Fig 2: Threaded Connection - Front Muffler, Vehicle without Particulate Filter

Courtesy of AUDI OF AMERICA, LLC

1. Nuts - 25 Nm
2. Nut - 25 Nm
3. Bolt - 20 Nm

Front Muffler Mounting Replacement Part, Vehicle without Particulate Filter 

Fig 3: Front Muffler Mounting Replacement Part, Vehicle without Particulate Filter

Courtesy of AUDI OF AMERICA, LLC

1. Spacer Sleeve
2. Pressure Spring
3. Washer
4. Bolt - 23 Nm
5. Bolt - 23 Nm
6. Spacer Sleeve
7. Buffer
8. Tab
9. Spacer Sleeve

Front Clamping Sleeve - Installation Position 

Fig 4: Identifying Clamping Sleeve Position

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeve in the position shown.

• Angle -α- = approximately 20°.
• The threaded connections are to the right.
• Nuts downward.

Rear Clamping Sleeve - Installation Position 

Fig 5: Double Clamps

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeve in the position shown.

• Threaded connections are to the left.
• Nuts downward.
• Bolt ends must not protrude over the lower edge of the clamping sleeve.