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Home >> Audi >> 2024 >> S3 Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 152 (Exhaust System, Emission Controls (Servicing - 5-Cylinder 2.5L TFSI Engine)) >> 26 Exhaust System, Emission Controls >> Emissions Control System >> Catalytic Converter, Removing And Installing >> Removing

Catalytic Converter, Removing And Installing: Removing

WARNING: This page is about a different car, the 2024 Audi RS 3. However, it is still accessible from the selected car via links, so may be relevant.

-- Vehicle without particulate filter: remove the rear catalytic converter or exhaust pipe. Refer to Emissions Control System ; Rear Catalytic Converter/Exhaust Pipe, Removing and Installing.

-- Remove the driveshaft. Refer to DRIVESHAFT, REMOVING AND INSTALLING .

-- Lower the subframe. Refer to SUBFRAME, LOWERING .

-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING .

-- Remove the Oxygen Sensor 1 before Catalytic Converter -GX10-. Refer to HEATED OXYGEN SENSOR, REMOVING AND INSTALLING .

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

Fig 1: Disconnecting Heated Oxygen Sensor (HO2S) Electrical Harness Connector
GWWA24-10262Courtesy of AUDI OF AMERICA, LLC

-- Free up the wire to the heated oxygen sensor.

-- Remove the drive axle heat shield. Refer to DRIVE AXLE HEAT SHIELD, REMOVING AND INSTALLING .

Vehicles with a particulate filter:

GWWA26-12096Courtesy of AUDI OF AMERICA, LLC

-- Loosen the left and right center underbody trim panel from the inside and slightly lower. Refer to OVERVIEW - UNDERBODY TRIM PANELS .

-- Remove the left and right connector -1- from the bracket and free it up.

-- Disconnect the left and right connector -2- and free up the double exhaust gas temperature sensor.

-- Disconnect the connector -1- for the Particulate Filter Differential Pressure Sensor 2 -G1038-.

Fig 2: Particulate Filter Differential Pressure Sensor 2 -G1038-
GWWA24-12008Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -4- for the Particulate Filter Differential Pressure Sensor -G1037-.

Fig 3: Particulate Filter Differential Pressure Sensor -G1037-
GWWA24-12009Courtesy of AUDI OF AMERICA, LLC

All:

GWWA26-11834Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- and -2- and remove the heat shield -1- for the bevel box.

TIP:

If necessary, push the heat shield slightly to the side in order to remove the bolt -2- from above.

-- Loosen the screw-type clamp -3- and remove from the flange.

GWWA26-11879Courtesy of AUDI OF AMERICA, LLC

-- Remove the catalytic converter -2-.