Front Exhaust Pipe With Catalytic Converter

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 Audi A3, 2012 Audi A3, 2011 Audi A3, 2010 Audi A3, and 2009 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Removing

-- Remove the cover for the air guide; to do so disengage the side clips -arrows-.

Fig 1: Air Duct Cover Slide Clips

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-- Unclip the lower air guide, to do so disengage the clips -arrows-.

Fig 2: Identifying Lower Air Guide Clips

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-- Remove the lower air guide together with the air guide hose.

-- Disconnect electrical connector -1- on mass air flow (MAF) sensor -G70-.

Fig 3: Air Flow Housing, Electrical Connector And Guide Hose

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-- Remove the air guide hose -2-.

-- Remove the bolt -4- and the air filter housing.

NOTE:

Ignore -3-.

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

Fig 4: Front Exhaust Pipe/Turbocharger Nuts

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All Wheel Drive (AWD)

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

Fig 5: Identifying Driveshaft Flexible Disc Bolts

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-- Remove the driveshaft flexible disc bolts -arrows- from the bevel box while counter holding at the triangular flange with a lever.

Fig 6: Identifying Sealing Ring In Driveshaft Flange

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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.

All Vehicles

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

-- Disconnect the connector on the heated oxygen sensor (HO2S) --. Refer to Removal and Installation .

-- Remove exhaust system bracket -arrows-.

Fig 7: Identifying Exhaust System Bracket

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-- Remove the front cross member for the vehicle floor -arrows-.

Fig 8: Identifying Front Cross Member

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CAUTION:

Risk of damaging decoupling elements.

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

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

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

Installing

Tightening specifications, refer to MUFFLER ASSEMBLY OVERVIEW .

Installation is in reverse order of removal, note the following:

NOTE:

Replace gaskets and self-locking nuts.

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