Assembly overview: Notes
WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
1 - Turbocharger
2 - Gasket
- Replace
3 - Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor (O2S) Heater Z19 (black connector)
- Torque specification, 55 Nm
- Only use hot bolt paste to grease thread; do not let paste get onto slits of oxygen sensor body
- Hot bolt paste
- Removing and installing → - 24 - MULTIPORT FUEL INJECTION (MFI)
4 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) Heater 1 (behind Three Way Catalytic Converter (TWC)) Z29 (brown connector)
- Torque specification, 55 Nm
- Only use hot bolt paste to grease thread; do not let paste get onto slits of oxygen sensor body
- Hot bolt paste
- Removing and installing: → - 24 - MULTIPORT FUEL INJECTION (MFI)
5 - Catalytic converter
- Protect from hit and impact stress
- Removing and installing → Catalytic converter, removing and installing
6 - 25 Nm
- Replace
7 - Gasket
- Replace
8 - Bolt
9 - Front exhaust pipe
- With flex joint
- Decoupling element must not be bent more than 10 ° otherwise it may be damaged
- Removing and installing → Front exhaust pipe, removing and installing
10 - Front clamping sleeve
- Installed location: Threaded connection faces toward left
- Installation position of bolt ends Installed position of front clamping sleeve
- Before tightening, align exhaust system tension-free → Exhaust system, installing tension free
- Tighten threaded connections evenly.
11 - 23 Nm
- Replace
12 - Spacer sleeve
13 - Buffer
14 - Tab
15 - Spacer sleeve
16 - Bolt
17 - Rear muffler
- For left side of vehicle
- Original equipment as one unit with center muffler. For repairs, replace each separately.
- Separating point Separate exhaust pipes at separating point under Center muffler and rear muffler, separating
- Install exhaust system free of stress → Exhaust system, installing tension free
18 - Suspended mountings
- Replace if damaged
- Check pretension → Exhaust system, installing tension free
19 - 23 Nm
20 - Rear muffler
- For right side of vehicle
- Original equipment as one unit with center muffler. For repairs, replace each separately.
- Separating point Separate exhaust pipes at separating point under Center muffler and rear muffler, separating
- Install exhaust system free of stress → Exhaust system, installing tension free
21 - 23 Nm
22 - 23 Nm
23 - Rear clamping sleeves
- For individual replacement of center and rear mufflers
- Before tightening, align exhaust system tension-free → Exhaust system, installing tension free
- Installed location: Threaded connections face outward
- Installation position of bolt ends Installed position of rear double clamps
- Tighten threaded connections evenly.
24 - Center muffler
- Original equipment as one unit with rear mufflers. For repairs, replace each separately.
- Separating point Separate exhaust pipes at separating point under Center muffler and rear muffler, separating
- Install exhaust system free of stress → Exhaust system, installing tension free
25 - 23 Nm
26 - Suspended mount
- Replace if damaged
- When installing, pay attention to direction of arrow (driving direction)
- Check pretension → Exhaust system, installing tension free
27 - Bolt
28 - Washer
29 - Spring
30 - Spacing sleeve
31 - 25 Nm
- Replace
32 - 30 Nm
- Replace