A4 Sedan V6-3.2L (BKH) (2007)
Oxygen Sensor: Service and Repair
Oxygen Sensor Before Catalytic Converter, Bank 2
Oxygen Sensor Before Catalytic Converter, Bank 2
Special tools, testers and auxiliary items required
‹› Ring Spanner 7-Piece Set for Oxygen Sensor (3337 )
Removing
‹› All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.
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Pull rear engine cover off - arrows -.
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Remove coolant expansion tank - arrow -.
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Disconnect electrical connection from engine coolant level warning switch (F66) at bottom of coolant reservoir and set aside coolant reservoir
with coolant hoses - 1 - and - 2 - connected.
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Disconnect the electrical harness connector - 2 - for heated oxygen sensor 2 (G108) and free up wire.