Right Primary Catalytic Converter: Removing

-- On a vehicle with air suspension, activate vehicle lift mode. Refer to VEHICLE LIFT MODE .

-- Pull rear engine cover off -arrows-.

Fig 1: Pulling Rear Engine Cover

Courtesy of AUDI OF AMERICA, LLC

-- Pull front engine cover off -arrows-.

Fig 2: Identifying Front Engine Cover, Electrical Connector, And Left Air Guide Hose

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect electrical connector -2- at Mass Airflow (MAF) sensor 2 -G246-.

Fig 3: Locating Electrical Connector, Air Guide Hose, And Retaining Clips

Courtesy of AUDI OF AMERICA, LLC

-- Remove left air guide hose -1- from air duct.

-- Release retaining clips -3- and remove upper left section of air filter housing.

-- Disconnect hose -1- to Secondary Air Injection (AIR) pump.

Fig 4: Identifying Hose To Secondary Air Injection Pump, Electrical Harness Connector, Right Air Guide Hose, And Retaining Clips

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect electrical harness connector -4- at MAF sensor -G70-.

-- Remove right air guide hose -3- from air duct.

-- Release retaining clips -2- and remove upper right section of air filter housing from lower part.

Vehicles with air suspension:

-- Press circlip -1- forward from hose coupling.

Fig 5: Circlip, Release Ring And Ventilation Hose

Courtesy of AUDI OF AMERICA, LLC

-- Press release ring -2- down -arrows- and remove vent hose -3- from upper section of air filter.

All Vehicles

-- Disconnect vacuum hose -2- to Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- by pressing release button.

Fig 6: Identifying Vacuum Hose To Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

Courtesy of AUDI OF AMERICA, LLC

-- Free up vacuum hose.

-- Disconnect electrical harness connector -2- from EVAP canister purge regulator valve 1 --.

Fig 7: Identifying Electrical Harness Connector And Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

Courtesy of AUDI OF AMERICA, LLC

-- Remove EVAP canister purge regulator valve 1 -- -1- from bracket and lay aside.

-- Disconnect the vacuum hose -4-.

Fig 8: Identifying Vacuum Hoses, Hose Clamp, Bolts, And Crankcase Ventilation Hose

Courtesy of AUDI OF AMERICA, LLC

-- Lay the air guide hose aside with the vacuum hose connected.

-- Loosen hose clamp -1- and remove bolts -3-.

-- Remove air guide pipe to right.

-- Remove electrical connectors -1- for Heated Oxygen Sensor (HO2S) -G39- and -2- for Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130- from bracket on right strut tower.

Fig 9: Identifying Electrical Connectors

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect electrical connections and free up electrical wiring to Heated Oxygen Sensor (HO2S) -G39- and O2S) after TWC -G130-.

-- Remove right front wheel.

-- Remove screws and remove front -1- and rear -2- noise insulation.

Fig 10: Identifying Front/Rear Noise Insulation

Courtesy of AUDI OF AMERICA, LLC

-- Remove bracket for noise insulation -arrows-.

Fig 11: Identifying Bracket For Noise Insulation

Courtesy of AUDI OF AMERICA, LLC

-- Separate exhaust system at clamping sleeve -2-.

Fig 12: Identifying Double Pipe Clamps Between Catalytic Converter/Front Muffler

Courtesy of AUDI OF AMERICA, LLC

-- Remove right main catalytic converter bracket bolts -1- and -2-.

Fig 13: Identifying Right Main Catalytic Converter Bracket Bolts And Nuts

Courtesy of AUDI OF AMERICA, LLC

-- Remove nuts -arrows- and remove right main catalytic converter.

-- Remove front driveshaft heat shield -arrows-.

Fig 14: Front Drive Shaft Heat Shield

Courtesy of AUDI OF AMERICA, LLC

-- Remove bolt -arrow- at right primary catalytic converter strap.

Fig 15: Identifying Bolt At Right Primary Catalytic Converter Strap

Courtesy of AUDI OF AMERICA, LLC

-- Remove nuts -1 to 3- and remove right primary catalytic converter.

Fig 16: Right Primary Catalytic Converter Falnge Nuts

Courtesy of AUDI OF AMERICA, LLC