A8L Quattro Sedan V8-4.2L (BVJ) (2007)
Oxygen Sensor: Service and Repair
Oxygen Sensors, Cylinder Bank 2
Oxygen Sensors, Cylinder Bank 2
Special tools, testers and auxiliary items required
‹› Ring spanner 7-piece set (3337)
Removing
‹› All cable ties opened or cut off during engine removal must be reinstalled at the same locations during installation.
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Remove the rear engine cover.
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Remove the vacuum hoses - arrows - from the brake booster.
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Lay the vacuum lines aside.
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Disconnect the cable ties - 1 - and free up the rear engine wiring harness by pull the harness slightly to the right.
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Remove the affected electrical connector from the bracket and disconnect it.
3
To the Heated Oxygen Sensor (HO2S) 2
4
To the Oxygen Sensor (O2S) 2 behind Three Way Catalytic Converter (TWC)
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Free up the electrical wiring to the oxygen sensors.