S6 V8-4.2L (BBD) (2004)
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Disconnect harness connector -3- from Mass Air Flow (MAF) sensor.
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Disengage EVAP canister valve -2- from air filter housing.
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Disconnect hose -1- from Secondary Air Injection (AIR) pump (turn toward left and pull off).
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Remove air guide hose from intake tube.
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Disconnect front right vacuum hose from engine.
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Remove bolt (arrow).
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Remove air filter housing with Mass Air Flow (MAF) sensor and air guide hose.
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Disconnect electrical harness connectors -1- and -3- for oxygen sensors and expose the wires.
NOTE: Secure a binding wire to connector for oxygen sensor behind catalytic converter to facilitate pulling in the wire during installation.
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Loosen upper bolt on connection of exhaust manifold/exhaust pipe.
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Loosen connecting bolts (arrows) at exhaust manifold/front exhaust pipe from below.
