S4 V8-4.2L (BHF) (2004)
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Remove bolts - 1 - and - 2 -.
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Loosen hose clamps - arrows - and remove right coolant pipe from coolant hoses.
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Disconnect electrical harness connector - 2 - at Engine Coolant Temperature (ECT) Sensor -G2-/-G62-.
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Remove nut - 1 - and remove electrical wiring harness at rear coolant pipe.
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Remove bolts - 2 to 5 -.
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Remove rear coolant pipe.
Note: Disregard - item 1 - and - item 6 -.
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Remove mounting bolts - 1 to 4 - of combination valves for Secondary Air Injection (AIR) system.