Front Exhaust Pipe With Catalytic Converter

Removing

-- Remove the air filter housing, refer to AIR FILTER HOUSING .

-- Disconnect the heated oxygen sensor connector -arrow- and free up the wire.

Fig 1: Disconnecting Heated Oxygen Sensor (HO2S) G39 Harness Connector

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-- From above, remove the front exhaust pipe to turbocharger nuts -arrows-.

Fig 2: Front Exhaust Pipe/Turbocharger Nuts

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With All Wheel Drive (AWD)

-- Disconnect the driveshaft from the bevel box and secure it to the right, refer to REMOVAL AND INSTALLATION , REMOVAL AND INSTALLATION or REMOVAL AND INSTALLATION .

Continuation for All

-- Remove the nuts accessible from below for the front exhaust pipe to turbocharger.

-- Remove the nuts -arrows- and slightly pull the vehicle floor cover downward.

Fig 3: Identifying Right Vehicle Floor Cover Nuts

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-- Disconnect the electrical connector -arrow- on the right side of the underbody.

Fig 4: Identifying Right Side Of The Vehicle Floor Electrical Connector

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-- Remove the electrical connector out of the bracket and free up the electrical wire to the oxygen sensor.

-- Remove the exhaust system suspended mount bolts -arrows-.

Fig 5: Exhaust System Bracket

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-- Remove the front tunnel brace nuts -arrows- and brace.

Fig 6: Front Cross Member

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CAUTION:

Danger of causing damage to the coupling elements.

-- Loosen the clamping sleeve -1- and push it rearward.

-- Remove the front exhaust pipe with catalytic converter.

Installing

Install in the reverse order of removal. Note the following:

Tightening Specifications

Component		Nm
Front tunnel brace to underbody nuts		25