S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Disconnect connector - 4 -.
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Lay free Heated Oxygen sensor (HO2S) wiring downward.
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Remove right front wheel.
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Remove bolts - arrows - for exhaust pipe of auxiliary/additional heater at noise insulation, on vehicles with auxiliary heater.
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Unfasten quick-release fasteners - 1 -, remove bolts - 2 - and detach noise insulation.
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Remove holder screws for noise insulation - arrows -.
