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Home >> Audi >> 2017 >> A7 Quattro Competition >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Exhaust System & Emission Controls System (Service Information - 3.0L - CPNB)) >> 26 Exhaust System, Emission Controls >> Emissions Control >> Catalytic Converter, Removing And Installing >> Catalytic Converter, Removing And Installing, Vehicles With Two Turbochargers >> Removing

Catalytic Converter, Removing And Installing, Vehicles With Two Turbochargers: Removing

WARNING: This page is about a different car, the 2016 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:

When working on the whole exhaust system:

-- Remove the steering intermediate shaft from the steering gear and then push the splines into each other. Refer to STEERING COLUMN .

-- Remove the front exhaust pipe. Refer to EXHAUST PIPE, REMOVING AND INSTALLING, VEHICLES WITH TWO TURBOCHARGERS. .

-- Remove the heated oxygen sensor. Refer to HEATED OXYGEN SENSOR, REMOVING AND INSTALLING .

-- Remove the Exhaust Gas Temperature Sensor 2 -G448-. Refer to Exhaust Gas Temperature Sensor 2 -G448-, INSTALLING AND REMOVING, VEHICLES WITH TWO TURBOCHARGERS .

-- Remove the subframe crossbrace. Refer to SUBFRAME .

CAUTION:

The suspension components could be damaged.

  • Do not rest the vehicle on its wheels if the subframe mount, the steering gear or the subframe crossbrace are not installed correctly.

-- Remove bolts -arrows- and then remove the heat shield.

GWWA37-11167Courtesy of AUDI OF AMERICA, LLC

-- Remove the left longitudinal member bolts -arrows- and remove the heat shield -1-.

GWWA10-11377Courtesy of AUDI OF AMERICA, LLC

-- If equipped remove the bolts -arrows-.

GWWA19-11244Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1-, and set aside the Transmission Fluid Cooling Valve -N509- with the coolant hoses -2- still attached.

-- Remove the bolts and nuts -arrows-, and remove the heat shield -1-.

GWWA26-11177Courtesy of AUDI OF AMERICA, LLC

-- Remove the Exhaust Gas Temperature Sensor 3 -G495- -1- and pressure pipe -3- for the Differential Pressure Sensor -G505-.

GWWA26-11154Courtesy of AUDI OF AMERICA, LLC
NOTE:

Ignore item -2-.

Vehicles with an SCR System 

GWWA23-10825Courtesy of AUDI OF AMERICA, LLC

-- Remove the NOx Sensor -G295- -arrow- free up and set to the left side.

Continuation for All Vehicles 

GWWA26-11167Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows-.

-- Remove the bolts -1 and 2- and remove the bracket.

GWWA26-11155Courtesy of AUDI OF AMERICA, LLC

Vehicles with an SCR System 

GWWA10-10179Courtesy of AUDI OF AMERICA, LLC

-- Remove the left driveshaft cover -1- in the wheel housing.

-- Remove the bolts -arrows- and remove the left drive axle heat shield.

GWWA34-10397Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -1 and 2-. If required disengage the catalytic converter with a second technician from the turbocharger.

GWWA26-11578Courtesy of AUDI OF AMERICA, LLC

-- To improve the accessibility for the next step, push the catalytic converter to the side.

-- Remove the connection for the Catalytic Converter Heater 1 -Z119- and Catalytic Converter Heater 2 -Z120- with the : T40317  .

GWWA26-11583Courtesy of AUDI OF AMERICA, LLC

Continuation for All Vehicles 

-- Remove the catalytic converter.