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Home >> Audi >> 2019 >> RS 3 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Exhaust System, Emission Controls [DAZA,DNWA] (Servicing) >> 26 Exhaust System, Emission Controls >> Emissions Control System >> Catalytic Converter, Removing And Installing >> Removing

Catalytic Converter, Removing And Installing: Removing

-- Vehicle without particulate filter: remove the rear catalytic converter or exhaust pipe. Refer to REAR CATALYTIC CONVERTER/EXHAUST PIPE, REMOVING AND INSTALLING

-- Remove the driveshaft. Refer to appropriate service information. .

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

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

-- Remove the Heated Oxygen Sensor -G39-. Refer to HEATED OXYGEN SENSOR, REMOVING AND INSTALLING .

-- Remove the connector -1- for the Oxygen Sensor after Catalytic Converter -G130- 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 UNDERBODY TRIM PANELS, REMOVING AND INSTALLING .

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

Fig 2: Particulate Filter Differential Pressure Sensor -G1037- Tightening Specification
GWWA24-12009Courtesy of AUDI OF AMERICA, LLC

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

Fig 3: Particulate Filter Differential Pressure Sensor 2 -G1038- Tightening Specification
GWWA24-12008Courtesy 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: 

The bolt -2- is accessible from above over the air filter housing.

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

GWWA26-11879Courtesy of AUDI OF AMERICA, LLC

-- Remove the catalytic converter -2-.