Overview - Muffler, Vehicles With Two Rear Mufflers

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2017 Audi A5 Quattro, 2016 Audi A5 Quattro, 2015 Audi A5 Quattro, 2014 Audi A5 Quattro, and 2014 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The exhaust manifold and turbocharger are one component; Removing and installing. Refer to TURBOCHARGER .

Fig 1: Exploded View Of Muffler

Courtesy of AUDI OF AMERICA, LLC

Gasket
- Always replace
Heated Oxygen Sensor -G39- and Oxygen Sensor Heater -Z19-
- Removing and installing. Refer to HEATED OXYGEN SENSOR -G39-, REMOVING AND INSTALLING .
Oxygen Sensor after Catalytic Converter -G130- and Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-
- Removing and installing. Refer to OXYGEN SENSOR AFTER CATALYTIC CONVERTER -G130-, REMOVING AND INSTALLING .
Catalytic Converter
- Protect catalytic converter from shocks and impact stress
- Removing and installing. Refer to CATALYTIC CONVERTER, REMOVING AND INSTALLING .
- Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Front Muffler
- With a coupling
- Decoupling element must not be bent more than 10° - otherwise it may be damaged
- Do not load decoupling element on cable
- Do not damage wire mesh at decoupling element
- Removing and installing. Refer to FRONT EXHAUST PIPE, REMOVING AND INSTALLING .
- Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Front Clamping Sleeve
- Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
- Installation position. Refer to Fig 2.
- Tighten the threaded connections evenly
Nut
- 23 Nm
Center Muffler
- Original equipment as one unit with rear mufflers. If a repair is required replace each separately
- For removal, remove the diagonal braces. Refer to Fig 4
- Separating point. Refer to EXHAUST PIPES/MUFFLERS, SEPARATING, VEHICLES WITH TWO REAR MUFFLERS .
- Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Left Rear Clamping Sleeve
- For individual replacement of the center and rear mufflers
- Installation position. Refer to Fig 3.
- Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
- Tighten threaded connections evenly.
Left Rear Muffler
- Original equipment as one unit with center muffler and tailpipe
- For removal, remove the diagonal braces. Refer to Fig 4
- Replace the center mufflers, the rear muffler and the tail pipe individually
- Separating point between the center and rear muffler. Refer to EXHAUST PIPES/MUFFLERS, SEPARATING, VEHICLES WITH TWO REAR MUFFLERS .
- Separating point between the rear muffler and the tailpipe. Refer to TAIL PIPES, REPLACING, VEHICLES WITH TWO REAR MUFFLERS .
- Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Tail Pipe
- Original equipment as one unit with the rear muffler. If a repair is required replace each separately
- Separating point. Refer to TAIL PIPES, REPLACING, VEHICLES WITH TWO REAR MUFFLERS .
- Aligning. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Clamp
- 23 Nm
Mount
- Replace if damaged
- Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Nut
- 20 Nm
- Always replace
Nut
- 23 Nm
Right Rear Muffler
- Original equipment as one unit with center muffler and tailpipe
- For removal, remove the diagonal braces. Refer to Fig 4
- Replace the center mufflers, the rear muffler and the tail pipe individually
- Separating point between the center and rear muffler. Refer to EXHAUST PIPES/MUFFLERS, SEPARATING, VEHICLES WITH TWO REAR MUFFLERS .
- Separating point between the rear muffler and the tailpipe. Refer to TAIL PIPES, REPLACING, VEHICLES WITH TWO REAR MUFFLERS .
- Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Right Rear Clamping Sleeve
- Tighten threaded connections evenly.
- For individual replacement of the center and rear mufflers
- Installation position. Refer to Fig 3.
- Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Bolt
- 20 Nm
- Always replace
Mount
- Replace if damaged
- Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING FREE OF TENSION, VEHICLES WITH TWO REAR MUFFLERS .
Seal
- Always replace
Nut
- 25 Nm
Nut
- 40 Nm
- Always replace
- Coat turbocharger stud bolts with hot bolt paste.
- Hot bolt paste.

Installed Position of the Front Clamping Sleeve

Fig 2: Identifying Clamping Sleeve Position

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeve in the angle position shown.

Threaded connections point toward the right
The nuts face up
α = approximately 20°

Installed Position of Rear Clamping Sleeve

Fig 3: Identifying Installed Position Of Rear Double Clamps

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeves so that the bolt ends do not project over lower edge of the clamping sleeves.

Installation position: threaded connections forward.

Diagonal Braces

Fig 4: Audi A5 Cabriolet Diagonal Braces

Courtesy of AUDI OF AMERICA, LLC

-- To remove, remove the diagonal braces for the center and rear mufflers -1 and 2-.

-- Install the diagonal braces. Refer to DIAGONAL BRACE, REMOVING AND INSTALLING (A5 CABRIOLET) , DIAGONAL BRACE, SPORTBACK and DIAGONAL BRACE, CABRIOLET .