S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Disconnect the Oxygen Sensor (O2S) 2 Heater ( Z28) for Heated Oxygen Sensor (HO2S) 2 (G108) electrical harness connector - 4 -.
Procedure for accessing Oxygen Sensor (O2S) Heater (Z19) electrical harness.
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Remove the cover on the right side of the engine compartment - 1 -.
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Remove the air intake duct - arrows -.
