A3 Quattro L4-2.0L Turbo (CBFA) (2009)
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Unclip the lower air guide, to do so disengage the clips - arrows -.
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Remove lower air guide together with the air guide hose.
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Disconnect electrical connector - 1 - on Mass Air Flow (MAF) Sensor (G70).
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Remove air guide hose - 2 -.
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Remove bolt - 4 - and the air filter housing.