Left front exhaust pipe with catalytic converter, removing and installing (vehicles with automatic transmission 01J): Removing

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Removing Rear Engine Cover

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Remove rear engine cover (arrows).

Fig 2: Removing Cover In Engine Compartment (Right Side)

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Remove cover -1- in engine compartment (right side).

Fig 3: Identifying Holding Plate, Intake Air Hose, Hose & Air Duct

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Remove bolts for holding plate -3- for solenoid valves (arrows).
Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
Remove hose -4- from air duct -2-.

Fig 4: Removing Bolt And Disconnect Air Duct At Throttle Valve Control Module

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Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
Disconnect hose -1- from air duct.

NOTE: Illustration shows the air guide from rear with the engine removed.

Fig 5: Removing Cover In Engine Compartment (Left Side)

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Remove cover -1- in engine compartment (left side).

Fig 6: Removing Coolant Hoses

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Remove coolant reservoir (arrow)
Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- at bottom of coolant reservoir.
Tie coolant reservoir with connected coolant hoses -1 to 3- to side.

Fig 7: Disconnecting Vacuum Hose To Brake Booster

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Disconnect vacuum hose to brake booster (arrows).
Remove heat shield for harness connectors at left of bulkhead, if installed.

Fig 8: Removing Harness Connectors From Bracket At Left Of Bulkhead

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Remove harness connectors -1 to 4- from bracket at left of bulkhead.
Disconnect electrical harness connectors -1- and -4-.
Move wires to oxygen sensors clear.

Fig 9: Unscrewing Oxygen Sensor Behind Catalytic Converter Using Special Tool 3337/7

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Unscrew oxygen sensor behind catalytic converter (arrow) using special tool 3337/7.

NOTE: Illustration is shown with engine removed.

Fig 10: Removing Nut For Left Exhaust Pipe/Exhaust Manifold

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Remove nut -2- for exhaust pipe/exhaust manifold which is accessible from top.

NOTE: Illustration is shown with engine removed.

Remove left front wheel.

Fig 11: Identifying Exhaust Pipe Fasteners

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For vehicles with auxiliary heater, remove bolts (arrows) for exhaust pipe of auxiliary heater on sound insulation.

Fig 12: Identifying Quick-Release Fasteners And Noise Insulation

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Remove bolts or release quick-release screws -1- and -2- and remove front sound insulation.
Remove quick-release screws -3- and remove rear sound insulation, if present.

Fig 13: Removing Bolts For Front Vehicle Floor Crossmember

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Remove bolts -1- through -4- and remove crossmember.

NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged..

Fig 14: Disconnecting Exhaust System At Double Clamps

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Disconnect exhaust system at both double clamps (arrows).

Fig 15: Removing VAG1359/2 Universal Mount From VAG1383A Engine/Transmission Jack And Inserting Piece Of Wood Instead

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Remove VAG1359/2 universal mount from VAG1383A engine/transmission jack and insert a piece of wood -1- instead.
Support rear crossmember using VAG1383A engine/transmission jack.

Fig 16: Removing Bolts & Slowly Release Rear Crossmember Using VAG1383A Engine/Transmission Jack