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Overview - Emissions Control System, Vehicles With Emissions Control Module

Fig 1: Exploded View Of Emissions Control System (Vehicles With Emissions Control Module)
GWWA26-11228Courtesy of AUDI OF AMERICA, LLC
  1. Front Exhaust Pipe
  2. Screw-Type Clamp
    • Replace after removing
    • Installation position. Refer to Figure.
    • 7 Nm
  3. Seal
    • Replace after removing
    • Note the installation position. Refer to Figure.
  4. Bolt
    • Tightening specification and sequence. Refer to Figure.
  5. Seal
    • Replace after removing
  6. Screw-Type Clamp
    • Replace after removing
    • Tightening specification and sequence. Refer to Figure.
  7. EGR Cooler
  8. Bolt
    • Tightening specification and sequence. Refer to Figure.
  9. Bolt
    • Tightening specification and sequence. Refer to Figure.
  10. Bracket
    • For the EGR cooler
  11. Screw-Type Clamp
    • Replace after removing
    • Installation position. Refer to Fig 3.
  12. Bolt
    • Tightening specification and sequence. Refer to Fig 5.
  13. Turbocharger
  14. Seal
    • Replace after removing
    • Place on the catalytic converter.
  15. Bracket
    • For the emissions control module
    • with lifter
    • Preparing the lifter for installation. Refer to Installing - .
  16. Bolt

    Tightening specification and sequence. Refer to Fig 5.

    Fig 2: Emissions Control Module Bracket - Tightening Sequence
    GWWA21-10780Courtesy of AUDI OF AMERICA, LLC
  17. Bolt
    • Tightening specification and sequence. Refer to Figure.
  18. Bolt
    • 9 Nm
  19. Metering Tube
    • To the Differential Pressure Sensor -G505-
    • Depending on the version, there is an additional metering tube to the Exhaust Pressure Sensor 1 -G450-
    • Union nut tightening specification: 45 Nm
  20. Bolt
    • Tightening specification and sequence. Refer to Figure.
  21. Bolt
    • Tightening specification and sequence. Refer to Figure.
  22. Bracket
    • For the emissions control module
    • with lifters
    • Preparing the lifters for installation. Refer to Installing - .
  23. Bolt
    • Tightening specification and sequence. Refer to Figure.
  24. Emissions Control Module
  25. Bolt
    • Tightening specification and sequence. Refer to Figure.

Installation Position of Emissions Control Module Screw-Type Clamp 

Fig 3: Installed Location of the Emissions Control Module Screw Clamp
GWWA26-11282Courtesy of AUDI OF AMERICA, LLC

Emissions Control Module Bracket 2 - Tightening Specifications and Sequence 

Fig 4: Emissions Control Module Bracket 2 - Tightening Sequence
GWWA26-11287Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in steps according to the sequence:

Step Bolts Tightening Specification
1. -3- Install all the way by hand
2. -1- 20 Nm
3. -3- 20 Nm
Fig 5: Emissions Control Module Bracket - Tightening Sequence
GWWA21-10780Courtesy of AUDI OF AMERICA, LLC