A4 V6-3.0L (AVK) (2004)
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Unbolt bracket for ATF lines (arrow).
NOTE: Observe the rules of cleanliness for working on automatic transmissions.
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Place oil pan underneath.
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Remove bolt (arrow) and disconnect ATF lines from transmission.
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Tie up ATF lines off to side.
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Expose oxygen sensor wire.
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Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold.
NOTE: Illustration is shown with engine removed.
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Remove front exhaust pipe with catalytic converter.
Installing
Installation is the reverse of removal, noting the following.
NOTE:
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All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.
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Oxygen sensor threads are coated with an assembly paste. This paste must not get into the sensor openings.
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Replace gaskets and self-locking nuts.
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Install oxygen sensor.