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Overview - Emissions Control System

Fig 1: Exploded View Of Emissions Control System
GWWA26-11623Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
    • 20 Nm
  2. Bracket
    • Replace if damaged
  3. Catalytic Converter
  4. Bolt
    • 23 Nm
  5. Nut

    Tightening specification and sequence. Refer to Fig 3.

  6. Bracket
    • For catalytic converter
  7. Bracket
    • For catalytic converter
  8. Screw-Type Clamp
    • Replace after removing.
    • Tightening specification and sequence. Refer to Fig 3.
    • Installation position. Refer to Fig 2.
  9. Seal
    • Replace after removing.
  10. Turbocharger
  11. Nut

    Tightening specification and sequence. Refer to Fig 3.

  12. Clamping Sleeve
  13. Nut
    • 23 Nm

Installation Position of the Catalytic Converter Screw-Type Clamp 

Fig 2: Installed Location of the Catalytic Converter Screw Clamp
GWWA26-11274Courtesy of AUDI OF AMERICA, LLC

Catalytic Converter - Tightening Specification and Sequence 

Fig 3: Catalytic Converter - Tightening Sequence
GWWA26-10998Courtesy of AUDI OF AMERICA, LLC

-- Tighten the threaded connections in steps in the sequence shown:

Step Screw-Type Clamp/Nuts Tightening Specification
1. -1, 3 and 4- Install by hand all the way
  • It must be possible to slide the catalytic converter and bracket back and forth.
2. -2- Tighten the screw-type clamp to 15 Nm.
3. -1, 3 and 4- Tighten to 20 Nm