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The IAT sensor is in post IC piping. I don't see the point of having the IAT before the turbo. The air gets compressed, then cooled by the IC, if the ECU wants to know the IAT for anything useful it's got to take it after the IC. My experience has been that IAT sensors near or integrated with the MAF are mostly seen on N/A cars.
The cooled EGR does not affect the IAT readings as it's located right at the intake manifold.
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