S4 V8-4.2L (BHF) (2004)
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Unscrew fuel hose from connection on fuel rail pipe by counterholding using an open-end wrench at hexhead - 1 - and - 3 - and unscrewing union
nut - 2 -.
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Disconnect electrical harness connector - 2 - from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-.
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Disconnect electrical harness connector - 3 - at Mass Air Flow (MAF) Sensor -G70-.
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Disconnect hose - 1 - to Secondary Air Injection (AIR) pump.
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Disconnect air guide hose - 4 - at Mass Air Flow (MAF) Sensor -G70-.
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Move wiring harness clear at air filter housing.
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Remove clip and remove air filter housing with Mass Air Flow (MAF) Sensor -G70-.
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Disconnect vacuum hose - 1 -.
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Disconnect air guide hose - 2 - from Throttle Valve Control Module -J338-.
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Remove bolts - 5 - and - 6 - on right cylinder head.
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Disconnect electrical harness connectors - 1 to 4 -.
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Remove ignition coils - arrows -.
Note: Extractor T40039 can be used for ignition coil removal.