Overview - Exhaust Temperature Regulation

Fig 1: Exploded View Of Emissions Control System, Vehicles With Particulate Filter

Courtesy of AUDI OF AMERICA, LLC

1. Post-Particulate Filter Temperature Sensor -G527- or Exhaust Gas Temperature Sensor 4 -G648-
   • 45 Nm
   • Designation in the wiring diagram depends on the model
   • Removing and Installing. Refer to EXHAUST TEMPERATURE REGULATION COMPONENTS, REMOVING AND INSTALLING .
2. Nut
   • 9 Nm
3. Pre-Particulate Filter Temperature Sensor -G506- or Exhaust Gas Temperature Sensor 3 -G495-
   • 45 Nm
   • Designation in the wiring diagram depends on the model
   • Removing and Installing. Refer to EXHAUST TEMPERATURE REGULATION COMPONENTS, REMOVING AND INSTALLING .
4. Oxygen Sensor After Catalytic Converter -G130- with Heater for Oxygen Sensor 1 After Catalytic Converter -Z29- or Oxygen Sensor 1 After Catalytic Converter -GX7-
   • Designation in the wiring diagram depends on the model
   • Removing and Installing. Refer to -item 4) Oxygen Sensor After Catalytic Converter -G130- with Heater for Oxygen Sensor 1 After Catalytic Converter -Z29- or Oxygen Sensor 1 After Catalytic Converter -GX7- .
5. Heated Oxygen Sensor -G39- with Oxygen Sensor Heater -Z19- or Oxygen Sensor 1 Before Catalytic Converter -GX10-
   • Designation in the wiring diagram depends on the model
   • Removing and Installing. Refer to -item 5) Heated Oxygen Sensor -G39- with Oxygen Sensor Heater -Z19- or Oxygen Sensor 1 Before Catalytic Converter -GX10- .
6. Bolt
   • Tightening specification. Refer to -item 6) Bolt
7. Exhaust Pressure Sensor 1 -G450-
   • Removing and Installing. Refer to -item 7) Exhaust Pressure Sensor 1 -G450- .
8. Bolt
   • Refer to -item 8) Bolt
9. Pressure Lines
10. Heat Shield
11. Nut
    • Tightening specification. Refer to -item 11) Nut
12. Bolt
    • Tightening specification. Refer to -item 12) Bolt
13. Bolt
    • Tightening specification. Refer to -item 13) Bolt
14. Bolt
    • Tightening specification. Refer to -item 14) Bolt
15. Bolt
    • Tightening specification. Refer to -item 15) Bolt
16. Bracket
    • For the pressure line
17. Union Nut
    • Tightening specification. Refer to -item 17) Union Nut
18. Union Nut
    • Tightening specification. Refer to -item 18) Union Nut