A8L V8-4.2L (BFM) (2004)
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Disconnect the electrical connector - 2 - (black) for the Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130).
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Remove the bolt - 1 - for the exhaust pipe suspended mount.
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Remove the heat shield - 2 -.
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Free up the O2S behind TWC electrical wire.
‹› The flex joint in the front exhaust pipe must not be bent more than 10 degrees, otherwise it may be damaged.
