A6 Quattro Sedan V8-4.2L (ART) (2000)
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Disconnect connector -2- for oxygen sensor after Three Way Catalytic Converter (TWC) and move wiring aside.
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Remove upper bolt between exhaust pipe and exhaust manifold.
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Disconnect connector for oxygen sensor on left side -arrow- and move wiring aside.
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From below loosen lower bolts -arrows- securing exhaust manifold to front exhaust pipe.
