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Home >> Audi >> 2017 >> TT Quattro Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Exhaust System, Emission Controls [CNTC,CYFB] (1 Of 2) [Coupe]) >> 26 Exhaust System, Emission Controls >> Emissions Control System >> Overview - Emissions Control System

Overview - Emissions Control System

WARNING: This page is about a different variant/trim than selected.
Fig 1: Exploded View Of Emissions Control System
GWWA26-11623Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
    • 20 Nm
  2. Bracket
    • Replace if damaged
    • There are different versions. Refer to the Parts Information for the allocation.
  3. Catalytic Converter
  4. Bolt
    • 23 Nm
  5. Nut

    Tightening specification and sequence. Refer to Fig 4.

  6. Bracket
    • For catalytic converter
  7. Bracket
    • For catalytic converter
  8. Screw-Type Clamp
    • 15 Nm
    • Tightening specification and sequence. Refer to Fig 4.
    • Always replace after removing.
    • Installation position. Refer to Fig 3.
  9. Seal
    • Replace after removing.
  10. Turbocharger
  11. Nut

    Tightening specification and sequence. Refer to Fig 4.

  12. Front Clamping Sleeve
  13. Nut
    • 23 Nm

Installation Position for Front Clamping Sleeve

Fig 2: Installation Position For Front Clamping Sleeve
GWWA26-11280Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeve in the position shown.

Installation Position of the Catalytic Converter Screw-Type Clamp

Fig 3: Installed Location of the Catalytic Converter Screw Clamp
GWWA26-11274Courtesy of AUDI OF AMERICA, LLC

Catalytic Converter - Tightening Specification and Sequence

Fig 4: 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