A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Oxygen Sensor: Service and Repair
Oxygen Sensor After Catalytic Converter, Bank 2
Oxygen Sensor After Catalytic Converter, Bank 2
Special tools, testers and auxiliary items required
‹› Ring Spanner 7-Piece Set for Oxygen Sensor (3337 )
Removing
‹› All cable ties which are opened or cut open when removing, must be replaced in the same position when installing.
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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 - 1 - for oxygen sensor 2 after catalytic converter (G131) and free up the wiring.