S4 V8-4.2L (BHF) (2004)
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Remove cover - 1 - in engine compartment (left side).
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Clamp off coolant hose - 2 - using hose clamp 3094 and disconnect from coolant expansion tank.
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Seal connection using a plug that fits.
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Remove bolt from coolant reservoir - arrow -.
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Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom on expansion tank and set aside coolant expansion
tank with coolant hose - 1 - connected.
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Remove harness connectors - 1 to 4 - from bracket at left of bulkhead.
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Disconnect electrical harness connectors - 1 - and - 4 -.
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Remove bracket from bulkhead.
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Remove heat insulation sleeve on wiring harness and lay wiring harness clear.
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Move oxygen sensor wires downward and clear.
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Remove left front wheel.
