Front Exhaust Pipe With Catalytic Converters And Front Muffler

WARNING: This page is about a different variant/trim than selected.

Removing

Fig 1: Identifying Engine Cover

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-- Remove the heated oxygen sensor -G39-. Refer to Removal and Installation .

-- Remove the engine cover -arrows-.

Fig 2: Identifying Bolts -Arrows- And Air Guide

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-- Remove the bolts -arrows- and air guide.

-- Remove the coolant hose by loosening the hose clamp -1-.

Fig 3: Disconnecting Mass Air Flow Sensor

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-- Disconnect the connector -2- from the Mass Airflow (MAF) Sensor -G70-.

-- Detach upper section of air filter housing -arrow- and remove air filter insert.

-- Remove the bolts -arrows- and the lower section of the air filter housing.

Fig 4: Identifying Screws For Lower Portion Of Air Cleaner Housing

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-- Remove bolt -arrow-.

Fig 5: Identifying Air Guide Pipe

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-- Loosen the hose clamp -1- and lay the air guide pipe aside with the hose -2- connected.

NOTE:

Ignore -3-.

-- Remove the bolts -arrows- and nuts -1- and then remove the heat shield.

Fig 6: Locating Heat Shield Bolts

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-- Remove the nuts -arrows- on the front exhaust pipe/turbocharger connection from the top.

Fig 7: Front Exhaust Pipe/Turbocharger Nuts

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NOTE:

The illustration shows the installation position from below.

-- Mark position of flexible disc to bevel box flange for reinstallation.

-- Remove driveshaft flexible disc from bevel box -arrows- while counter holding on triangle flange with lever.

Fig 8: Driveshaft Flexible Disc

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CAUTION:

The shaft seal -arrow- in the driveshaft flange could be damaged.

Press driveshaft horizontally as far back and to right side of vehicle as possible.

Fig 9: Identifying Driveshaft Flange Shaft Seal

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-- Remove bolts -1- and -2- under the vehicle floor.

Fig 10: Identifying Retaining Screws And Cover

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-- Remove the cover from the oxygen sensor electrical connector bracket.

-- Remove the bolt -3- and free up the electrical wire to the oxygen sensor.

-- Remove the electrical connector -arrow- from the oxygen sensor after three way catalytic converter -G130- from the bracket and disconnect it.

Fig 11: Electrical Connector -Arrow-

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-- Remove the bolts -arrows-, exhaust system bracket and tunnel brace.

Fig 12: Identifying Crossbrace Bolts -Arrows-

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CAUTION:

Risk of damaging decoupling elements.

Do not bend decoupling element in front exhaust pipe more than 10°.

-- Disconnect the exhaust system at the clamping sleeve -arrows-.

Fig 13: Clamping Sleeve -Arrows-

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-- Remove the front exhaust pipe with the catalytic converter and front muffler.

Installing

For the correct tightening specifications, refer to MUFFLER OVERVIEW .

Installation is performed in reverse order of removal, noting the following.

NOTE:

Replace seals and self-locking nuts.

The hose supports, air guide pipes and hoses must be free of oil and grease before installing.

Secure all hose connections with hose clamps appropriate for the model.

-- Install exhaust system free of stress. Refer to EXHAUST SYSTEM, INSTALLING .