A8L Quattro Sedan V8-4.2L (BVJ) (2007)
Oxygen Sensor: Service and Repair
Oxygen Sensors, Cylinder Bank 1
Oxygen Sensors, Cylinder Bank 1
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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Free up the fuel line and line to the Evaporative Emission (EVAP) canister on the air guide hose.
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Remove the vacuum line - 4 - at the air guide hose.
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Lay aside the air guide hose with the connected crankcase ventilation hose - 3 - by loosening the hose clamps - 2 - and - 5 -.
CAUTION!
Hose connector - 3 - must not be opened.
‹› Ignore - item 1 -.
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Remove the Secondary Air Injection (AIR) air guide hose by pressing the release buttons on the ends of the hose - 1 through 3 -.