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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> Exhaust System, Emission Controls 2.0L (DMSA) >> 26 Exhaust System, Emission Controls >> Emissions Control System >> Catalytic Converter, Removing And Installing >> Catalytic Converter, Removing And Installing, Catalytic Converter With Particulate Filter >> Removing

Catalytic Converter, Removing And Installing, Catalytic Converter With Particulate Filter: Removing

-- Remove the rear noise insulation. Refer to OVERVIEW - NOISE INSULATION .

GWWA26-12031Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Risk of injury due to flying soot particles.

Irritation and injury to skin and eyes possible.

- Wear protective eyewear.

- Wear safety gloves.

-- Loosen the screw-type clamp -arrow-.

TIP:

To loosen the screw-type clamp counter with two nuts on the threaded spindle and loosen these.

-- Remove the bolt -arrow- from the catalytic converter bracket.

GWWA26-12313Courtesy of AUDI OF AMERICA, LLC

-- Remove the turbocharger. Refer to TURBOCHARGER, REMOVING AND INSTALLING .

-- Open the heat shield boot.

GWWA19-13291Courtesy of AUDI OF AMERICA, LLC

-- Loosen the hose clamp -arrow- and remove the coolant hose.

-- Remove the nuts -arrows- and bolts -2- and remove the heat shield.

Fig 1: Heat Shield For Vehicles With Particulate Filter
GWWA15-12175Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1-.

GWWA26-12306Courtesy of AUDI OF AMERICA, LLC

-- Open the heat shield boot.

GWWA24-12174Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -2-.

-- Remove the bolt -1- and free up the Particulate Filter Differential Pressure Sensor -G1037-.

-- Remove the connector -2- for the Oxygen Sensor 1 After Catalytic Converter -GX7- -1- from the bracket and disconnect it.

GWWA24-11902Courtesy of AUDI OF AMERICA, LLC

-- Remove and disconnect the connector -2- for the Oxygen Sensor 1 Before Catalytic Converter -GX10- -1- from the bracket.

GWWA24-12166Courtesy of AUDI OF AMERICA, LLC

-- Remove the catalytic converter toward the front.