Muffler Overview

Fig 1: Identifying Muffler Assembly Overview

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 23 Nm
2. Suspended Mount
   • Replace if damaged
   • Check pretension, refer to EXHAUST SYSTEM, INSTALLING 
3. Center Muffler
   • Original equipment as one unit with rear mufflers. For repairs, replace each separately.
   • To remove on the Audi A5 Cabriolet, remove the diagonal braces, refer to Fig 5
   • Separating point, refer to CENTER MUFFLER AND REAR MUFFLER, SEPARATING 
   • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
4. Rear Muffler
   • Original equipment as one unit with center muffler and tailpipe
   • in case of repairs, center muffler end muffler and tailpipe should be replaced individually
   • To remove on the Audi A5 Cabriolet, remove the diagonal braces, refer to Fig 5
   • Separating point between center and rear muffler, refer to CENTER MUFFLER AND REAR MUFFLER, SEPARATING 
   • Separating point between the rear muffler and the tailpipe, refer to TAIL PIPE 
   • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
5. Gasket
   • Replace
6. Nut
   • 23 Nm
7. Catalytic Converter
   • Protect from shocks and impact stress
   • Removing and installing: Left, refer to LEFT CATALYTIC CONVERTER , right, refer to RIGHT CATALYTIC CONVERTER 
   • Individual components of suspension, refer to Fig 4
8. Nut
   • 23 Nm
9. Gasket
   • Replace
10. Front Muffler
    • With decoupling element, decoupling element must not be bent more than 10° - otherwise it may be damaged
    • Removing and installing, refer to FRONT MUFFLER 
    • Install exhaust system free of stress, refer to EXHAUST SYSTEM, INSTALLING 
11. Front Clamping Sleeve
    • Installed position, refer to Fig 2
    • Before tightening, align exhaust system tension-free, refer to EXHAUST SYSTEM, INSTALLING 
    • Tighten threaded connections evenly.
12. Nut
    • 23 Nm
13. Bolt
    • 23 Nm
14. Clamp
15. Exhaust Tailpipe
    • Original equipment as one unit with rear muffler. For repairs, replace each separately.
    • Separating point, refer to TAIL PIPE 
    • Aligning, refer to ALIGN THE TAIL PIPES 
16. Suspended Mount
    • Replace if damaged
    • Check pretension, refer to EXHAUST SYSTEM, INSTALLING 
17. Nut
    • 20 Nm
    • Replace
18. Rear Clamping Sleeve
    • For individual replacement of center and rear mufflers
    • Installed position Fig 3
    • Before tightening, align exhaust system tension-free EXHAUST SYSTEM, INSTALLING 
    • Tighten threaded connections evenly.
19. Nut
    • 23 Nm
20. Nut
    • Replace
    • 23 Nm
21. Bolt
    • 23 Nm
22. Suspended Mount
    • Replace if damaged
    • Check pretension, refer to EXHAUST SYSTEM, INSTALLING 

Fig 2: Adjusting Front Double Clamps So Bolt Ends Do Not Project Over Lower Edges Of Double Clamps

Courtesy of AUDI OF AMERICA, LLC

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

• Installed position: Threaded connections point toward outside.

Fig 3: Identifying Installed Position Of Rear Double Clamps

Courtesy of AUDI OF AMERICA, LLC

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

• Installed position: Threaded connections point forward.

Fig 4: Identifying Individual Catalytic Converter Mounting Components

Courtesy of AUDI OF AMERICA, LLC

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

Fig 5: Audi A5 Cabriolet Diagonal Braces

Courtesy of AUDI OF AMERICA, LLC

-- Remove the Y-pipe and the diagonal braces for the rear muffler -1 and 2-.

-- Install diagonal braces. Refer to REMOVAL AND INSTALLATION .