A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Disconnect wiring connectors from:
1. EVAP valve
2. Mass Air Flow sensor
3. Wastegate bypass regulator valve -N75-
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Disconnect hoses -4 to 7-.
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Disconnect hose to secondary air injection pump motor -8-.
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Move wiring clear.
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Unbolt air cleaner housing -9-.
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Remove air cleaner.
NOTE: Vacuum line to secondary air combination valve is clipped to underside of air intake hose.
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Remove bolts (arrows) securing turbocharger to catalytic converter.
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Lift out catalytic converter.
Installing
Install in reverse order, paying attention to the following:
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Grease threads of oxygen sensor only with hot bolt paste G 052 112 A3; paste must not be allowed to come into contact with slits in sensor body.
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Align exhaust system free of stress.
Tightening torques
Components
Nm