A8L V8-4.2L (BFM) (2004)
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Unclip the hose - 2 -.
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Remove the air intake tube - arrows -.
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Disconnect the electrical connector - 1 - from the Mass Air Flow (MAF) sensor.
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Remove the air filter box - arrows -.
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Remove the bolts - 1 and 2 -.
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Reposition the crankshaft ventilation pipe clamps - arrows - and remove the pipe.