S4 V8-4.2L (BHF) (2004)
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Remove bolt (arrow) at oil dipstick guide tube.
NOTE: Guide tube remains inserted in upper part of oil pan.
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Remove air filter cover -2-.
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Remove air guide -1-.
NOTE: To remove clips (arrows), use e.g. lever 80-200.
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Disconnect electrical harness connector -3- from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-(item -2-).
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Remove solenoid valve from bracket.
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Disconnect electrical harness connector -4- at Mass Air Flow (MAF) sensor -G70-.
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Rotate hose -1- to Secondary Air Injection (AIR) pump toward left and disconnect.
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Disconnect air guide hose -5- at Mass Air Flow (MAF) sensor -G70-.
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Remove bolt (arrow).
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Remove air filter housing with Mass Air Flow (MAF) sensor -G70-.