Overview - Muffler, AUDI A4/A5

Fig 1: Location Muffler, AWD Vehicles

Courtesy of AUDI OF AMERICA, LLC

1. Center Muffler
   • Original equipment as one unit with rear mufflers. If a repair is required replace each separately
   • Separating point. Refer to EXHAUST PIPES/MUFFLER, SEPARATING, AUDI A4/A5 .
   • Removing and Installing. Refer to MUFFLER, REMOVING AND INSTALLING, AUDI A4/A5 .
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
2. Retaining Loop
   • Replace if damaged
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
3. Not Installed
4. Not Installed
5. Front Muffler
   • There are different versions. Refer to the Electronic Parts Information (ETKA) for the allocation.
   • With a 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 .
   • Individual components of the mounting. Refer to Fig 4.
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
6. Seal
   • Always replace after removing
7. Nut
   • Quantity: 3
   • Always replace after removing
   • 23 Nm
8. Bolt
   • 23 Nm
9. Mount
   • Replace if damaged
   • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
10. Front Clamping Sleeve
    • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Installation position. Refer to Fig 2.
    • Tighten the threaded connections equally to 23 Nm.
11. Rear Muffler
    • Original equipment one unit with the center muffler. If a repair is required replace each separately
    • Separating point. Refer to EXHAUST PIPES/MUFFLER, SEPARATING, AUDI A4/A5 .
    • Removing and Installing. Refer to MUFFLER, REMOVING AND INSTALLING, AUDI A4/A5 .
    • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
12. Mount
    • Replace if damaged
    • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
13. Bolt
    • 23 Nm
14. Rear Clamping Sleeve
    • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Installation position. Refer to Fig 3.
    • Tighten the threaded connections equally to 23 Nm.
15. Bracket
16. Bolt
    • M8: 23 Nm
    • M10: 55 Nm
17. Retaining Loop
    • Replace if damaged
    • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .

Fig 2: 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.

Fig 3: Double Clamps

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeve in the position shown.

• Threaded connections to the outer side of the vehicle
• Nuts downward.
• Bolt ends must not protrude over the lower edge of the clamping sleeve.

Fig 4: 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. Rubber Bushing
8. Tab
9. Spacer Sleeve